Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients
Abstract The effects of Co alloying to Pt catalyst and Nafion pretreatment by $ NaClO_{4} $ solution on the rate-determining step (RDS) of oxygen reduction at Nafion-impregnated Pt-dispersed carbon (Pt/C) electrode were investigated as a function of the potential step ΔE employing potentiostatic cur...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Lee, Sung-Jai [verfasserIn] Pyun, Su-Il [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2009 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Journal of solid state electrochemistry - Berlin : Springer, 1997, 14(2009), 5 vom: 07. Mai, Seite 775-786 |
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| Übergeordnetes Werk: |
volume:14 ; year:2009 ; number:5 ; day:07 ; month:05 ; pages:775-786 |
| Links: |
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| DOI / URN: |
10.1007/s10008-009-0854-x |
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| Katalog-ID: |
SPR007964072 |
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| 245 | 1 | 0 | |a Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients |
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| 520 | |a Abstract The effects of Co alloying to Pt catalyst and Nafion pretreatment by $ NaClO_{4} $ solution on the rate-determining step (RDS) of oxygen reduction at Nafion-impregnated Pt-dispersed carbon (Pt/C) electrode were investigated as a function of the potential step ΔE employing potentiostatic current transient (PCT) technique. For this purpose, the cathodic PCTs were measured on the pure Nafion-impregnated and partially $ Na^{+} $-doped Nafion-impregnated Pt/C and PtCo/C electrodes in an oxygen-saturated 1 M $ H_{2} %$ SO_{4} $ solution and analyzed. From the shape of the cathodic PCTs and the dependence of the instantaneous current on the value of ΔE, it was confirmed that oxygen reduction at the pure Nafion-impregnated electrodes is controlled by charge transfer at the electrode surface mixed with oxygen diffusion in the solution below the transition potential step |ΔEtr| in absolute value, whereas oxygen reduction is purely governed by oxygen diffusion above |ΔEtr|. On the other hand, the RDS of oxygen reduction at the partially $ Na^{+} $-doped Nafion-impregnated electrodes below |ΔEtr| is charge transfer coupled with proton migration, whereas above |ΔEtr|, it becomes proton migration in the Nafion electrolyte instead of oxygen diffusion. Consequently, it is expected in real fuel cell system that the cell performance is improved by Co alloying since the electrode reaches the maximum diffusion (migration) current even at small value of |ΔE|, whereas the cell performance is aggravated by Nafion pretreatment due to the decrease in the maximum diffusion (migration) current. | ||
| 650 | 4 | |a Oxygen reduction |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Change in rate-determining step |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Pt-dispersed carbon |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a PtCo-dispersed carbon |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Partially Na |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a -doped Nafion |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Pyun, Su-Il |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Journal of solid state electrochemistry |d Berlin : Springer, 1997 |g 14(2009), 5 vom: 07. Mai, Seite 775-786 |w (DE-627)271175400 |w (DE-600)1478940-1 |x 1433-0768 |7 nnns |
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10.1007/s10008-009-0854-x doi (DE-627)SPR007964072 (SPR)s10008-009-0854-x-e DE-627 ger DE-627 rakwb eng 540 ASE 35.14 bkl 35.90 bkl Lee, Sung-Jai verfasserin aut Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The effects of Co alloying to Pt catalyst and Nafion pretreatment by $ NaClO_{4} $ solution on the rate-determining step (RDS) of oxygen reduction at Nafion-impregnated Pt-dispersed carbon (Pt/C) electrode were investigated as a function of the potential step ΔE employing potentiostatic current transient (PCT) technique. For this purpose, the cathodic PCTs were measured on the pure Nafion-impregnated and partially $ Na^{+} $-doped Nafion-impregnated Pt/C and PtCo/C electrodes in an oxygen-saturated 1 M $ H_{2} %$ SO_{4} $ solution and analyzed. From the shape of the cathodic PCTs and the dependence of the instantaneous current on the value of ΔE, it was confirmed that oxygen reduction at the pure Nafion-impregnated electrodes is controlled by charge transfer at the electrode surface mixed with oxygen diffusion in the solution below the transition potential step |ΔEtr| in absolute value, whereas oxygen reduction is purely governed by oxygen diffusion above |ΔEtr|. On the other hand, the RDS of oxygen reduction at the partially $ Na^{+} $-doped Nafion-impregnated electrodes below |ΔEtr| is charge transfer coupled with proton migration, whereas above |ΔEtr|, it becomes proton migration in the Nafion electrolyte instead of oxygen diffusion. Consequently, it is expected in real fuel cell system that the cell performance is improved by Co alloying since the electrode reaches the maximum diffusion (migration) current even at small value of |ΔE|, whereas the cell performance is aggravated by Nafion pretreatment due to the decrease in the maximum diffusion (migration) current. Oxygen reduction (dpeaa)DE-He213 Change in rate-determining step (dpeaa)DE-He213 Pt-dispersed carbon (dpeaa)DE-He213 PtCo-dispersed carbon (dpeaa)DE-He213 Partially Na (dpeaa)DE-He213 -doped Nafion (dpeaa)DE-He213 Pyun, Su-Il verfasserin aut Enthalten in Journal of solid state electrochemistry Berlin : Springer, 1997 14(2009), 5 vom: 07. Mai, Seite 775-786 (DE-627)271175400 (DE-600)1478940-1 1433-0768 nnns volume:14 year:2009 number:5 day:07 month:05 pages:775-786 https://dx.doi.org/10.1007/s10008-009-0854-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 35.14 ASE 35.90 ASE AR 14 2009 5 07 05 775-786 |
| spelling |
10.1007/s10008-009-0854-x doi (DE-627)SPR007964072 (SPR)s10008-009-0854-x-e DE-627 ger DE-627 rakwb eng 540 ASE 35.14 bkl 35.90 bkl Lee, Sung-Jai verfasserin aut Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The effects of Co alloying to Pt catalyst and Nafion pretreatment by $ NaClO_{4} $ solution on the rate-determining step (RDS) of oxygen reduction at Nafion-impregnated Pt-dispersed carbon (Pt/C) electrode were investigated as a function of the potential step ΔE employing potentiostatic current transient (PCT) technique. For this purpose, the cathodic PCTs were measured on the pure Nafion-impregnated and partially $ Na^{+} $-doped Nafion-impregnated Pt/C and PtCo/C electrodes in an oxygen-saturated 1 M $ H_{2} %$ SO_{4} $ solution and analyzed. From the shape of the cathodic PCTs and the dependence of the instantaneous current on the value of ΔE, it was confirmed that oxygen reduction at the pure Nafion-impregnated electrodes is controlled by charge transfer at the electrode surface mixed with oxygen diffusion in the solution below the transition potential step |ΔEtr| in absolute value, whereas oxygen reduction is purely governed by oxygen diffusion above |ΔEtr|. On the other hand, the RDS of oxygen reduction at the partially $ Na^{+} $-doped Nafion-impregnated electrodes below |ΔEtr| is charge transfer coupled with proton migration, whereas above |ΔEtr|, it becomes proton migration in the Nafion electrolyte instead of oxygen diffusion. Consequently, it is expected in real fuel cell system that the cell performance is improved by Co alloying since the electrode reaches the maximum diffusion (migration) current even at small value of |ΔE|, whereas the cell performance is aggravated by Nafion pretreatment due to the decrease in the maximum diffusion (migration) current. Oxygen reduction (dpeaa)DE-He213 Change in rate-determining step (dpeaa)DE-He213 Pt-dispersed carbon (dpeaa)DE-He213 PtCo-dispersed carbon (dpeaa)DE-He213 Partially Na (dpeaa)DE-He213 -doped Nafion (dpeaa)DE-He213 Pyun, Su-Il verfasserin aut Enthalten in Journal of solid state electrochemistry Berlin : Springer, 1997 14(2009), 5 vom: 07. Mai, Seite 775-786 (DE-627)271175400 (DE-600)1478940-1 1433-0768 nnns volume:14 year:2009 number:5 day:07 month:05 pages:775-786 https://dx.doi.org/10.1007/s10008-009-0854-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 35.14 ASE 35.90 ASE AR 14 2009 5 07 05 775-786 |
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10.1007/s10008-009-0854-x doi (DE-627)SPR007964072 (SPR)s10008-009-0854-x-e DE-627 ger DE-627 rakwb eng 540 ASE 35.14 bkl 35.90 bkl Lee, Sung-Jai verfasserin aut Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The effects of Co alloying to Pt catalyst and Nafion pretreatment by $ NaClO_{4} $ solution on the rate-determining step (RDS) of oxygen reduction at Nafion-impregnated Pt-dispersed carbon (Pt/C) electrode were investigated as a function of the potential step ΔE employing potentiostatic current transient (PCT) technique. For this purpose, the cathodic PCTs were measured on the pure Nafion-impregnated and partially $ Na^{+} $-doped Nafion-impregnated Pt/C and PtCo/C electrodes in an oxygen-saturated 1 M $ H_{2} %$ SO_{4} $ solution and analyzed. From the shape of the cathodic PCTs and the dependence of the instantaneous current on the value of ΔE, it was confirmed that oxygen reduction at the pure Nafion-impregnated electrodes is controlled by charge transfer at the electrode surface mixed with oxygen diffusion in the solution below the transition potential step |ΔEtr| in absolute value, whereas oxygen reduction is purely governed by oxygen diffusion above |ΔEtr|. On the other hand, the RDS of oxygen reduction at the partially $ Na^{+} $-doped Nafion-impregnated electrodes below |ΔEtr| is charge transfer coupled with proton migration, whereas above |ΔEtr|, it becomes proton migration in the Nafion electrolyte instead of oxygen diffusion. Consequently, it is expected in real fuel cell system that the cell performance is improved by Co alloying since the electrode reaches the maximum diffusion (migration) current even at small value of |ΔE|, whereas the cell performance is aggravated by Nafion pretreatment due to the decrease in the maximum diffusion (migration) current. Oxygen reduction (dpeaa)DE-He213 Change in rate-determining step (dpeaa)DE-He213 Pt-dispersed carbon (dpeaa)DE-He213 PtCo-dispersed carbon (dpeaa)DE-He213 Partially Na (dpeaa)DE-He213 -doped Nafion (dpeaa)DE-He213 Pyun, Su-Il verfasserin aut Enthalten in Journal of solid state electrochemistry Berlin : Springer, 1997 14(2009), 5 vom: 07. Mai, Seite 775-786 (DE-627)271175400 (DE-600)1478940-1 1433-0768 nnns volume:14 year:2009 number:5 day:07 month:05 pages:775-786 https://dx.doi.org/10.1007/s10008-009-0854-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 35.14 ASE 35.90 ASE AR 14 2009 5 07 05 775-786 |
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10.1007/s10008-009-0854-x doi (DE-627)SPR007964072 (SPR)s10008-009-0854-x-e DE-627 ger DE-627 rakwb eng 540 ASE 35.14 bkl 35.90 bkl Lee, Sung-Jai verfasserin aut Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The effects of Co alloying to Pt catalyst and Nafion pretreatment by $ NaClO_{4} $ solution on the rate-determining step (RDS) of oxygen reduction at Nafion-impregnated Pt-dispersed carbon (Pt/C) electrode were investigated as a function of the potential step ΔE employing potentiostatic current transient (PCT) technique. For this purpose, the cathodic PCTs were measured on the pure Nafion-impregnated and partially $ Na^{+} $-doped Nafion-impregnated Pt/C and PtCo/C electrodes in an oxygen-saturated 1 M $ H_{2} %$ SO_{4} $ solution and analyzed. From the shape of the cathodic PCTs and the dependence of the instantaneous current on the value of ΔE, it was confirmed that oxygen reduction at the pure Nafion-impregnated electrodes is controlled by charge transfer at the electrode surface mixed with oxygen diffusion in the solution below the transition potential step |ΔEtr| in absolute value, whereas oxygen reduction is purely governed by oxygen diffusion above |ΔEtr|. On the other hand, the RDS of oxygen reduction at the partially $ Na^{+} $-doped Nafion-impregnated electrodes below |ΔEtr| is charge transfer coupled with proton migration, whereas above |ΔEtr|, it becomes proton migration in the Nafion electrolyte instead of oxygen diffusion. Consequently, it is expected in real fuel cell system that the cell performance is improved by Co alloying since the electrode reaches the maximum diffusion (migration) current even at small value of |ΔE|, whereas the cell performance is aggravated by Nafion pretreatment due to the decrease in the maximum diffusion (migration) current. Oxygen reduction (dpeaa)DE-He213 Change in rate-determining step (dpeaa)DE-He213 Pt-dispersed carbon (dpeaa)DE-He213 PtCo-dispersed carbon (dpeaa)DE-He213 Partially Na (dpeaa)DE-He213 -doped Nafion (dpeaa)DE-He213 Pyun, Su-Il verfasserin aut Enthalten in Journal of solid state electrochemistry Berlin : Springer, 1997 14(2009), 5 vom: 07. Mai, Seite 775-786 (DE-627)271175400 (DE-600)1478940-1 1433-0768 nnns volume:14 year:2009 number:5 day:07 month:05 pages:775-786 https://dx.doi.org/10.1007/s10008-009-0854-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 35.14 ASE 35.90 ASE AR 14 2009 5 07 05 775-786 |
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10.1007/s10008-009-0854-x doi (DE-627)SPR007964072 (SPR)s10008-009-0854-x-e DE-627 ger DE-627 rakwb eng 540 ASE 35.14 bkl 35.90 bkl Lee, Sung-Jai verfasserin aut Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The effects of Co alloying to Pt catalyst and Nafion pretreatment by $ NaClO_{4} $ solution on the rate-determining step (RDS) of oxygen reduction at Nafion-impregnated Pt-dispersed carbon (Pt/C) electrode were investigated as a function of the potential step ΔE employing potentiostatic current transient (PCT) technique. For this purpose, the cathodic PCTs were measured on the pure Nafion-impregnated and partially $ Na^{+} $-doped Nafion-impregnated Pt/C and PtCo/C electrodes in an oxygen-saturated 1 M $ H_{2} %$ SO_{4} $ solution and analyzed. From the shape of the cathodic PCTs and the dependence of the instantaneous current on the value of ΔE, it was confirmed that oxygen reduction at the pure Nafion-impregnated electrodes is controlled by charge transfer at the electrode surface mixed with oxygen diffusion in the solution below the transition potential step |ΔEtr| in absolute value, whereas oxygen reduction is purely governed by oxygen diffusion above |ΔEtr|. On the other hand, the RDS of oxygen reduction at the partially $ Na^{+} $-doped Nafion-impregnated electrodes below |ΔEtr| is charge transfer coupled with proton migration, whereas above |ΔEtr|, it becomes proton migration in the Nafion electrolyte instead of oxygen diffusion. Consequently, it is expected in real fuel cell system that the cell performance is improved by Co alloying since the electrode reaches the maximum diffusion (migration) current even at small value of |ΔE|, whereas the cell performance is aggravated by Nafion pretreatment due to the decrease in the maximum diffusion (migration) current. Oxygen reduction (dpeaa)DE-He213 Change in rate-determining step (dpeaa)DE-He213 Pt-dispersed carbon (dpeaa)DE-He213 PtCo-dispersed carbon (dpeaa)DE-He213 Partially Na (dpeaa)DE-He213 -doped Nafion (dpeaa)DE-He213 Pyun, Su-Il verfasserin aut Enthalten in Journal of solid state electrochemistry Berlin : Springer, 1997 14(2009), 5 vom: 07. Mai, Seite 775-786 (DE-627)271175400 (DE-600)1478940-1 1433-0768 nnns volume:14 year:2009 number:5 day:07 month:05 pages:775-786 https://dx.doi.org/10.1007/s10008-009-0854-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 35.14 ASE 35.90 ASE AR 14 2009 5 07 05 775-786 |
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English |
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Enthalten in Journal of solid state electrochemistry 14(2009), 5 vom: 07. Mai, Seite 775-786 volume:14 year:2009 number:5 day:07 month:05 pages:775-786 |
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Enthalten in Journal of solid state electrochemistry 14(2009), 5 vom: 07. Mai, Seite 775-786 volume:14 year:2009 number:5 day:07 month:05 pages:775-786 |
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Oxygen reduction Change in rate-determining step Pt-dispersed carbon PtCo-dispersed carbon Partially Na -doped Nafion |
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Journal of solid state electrochemistry |
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Lee, Sung-Jai @@aut@@ Pyun, Su-Il @@aut@@ |
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2009-05-07T00:00:00Z |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">SPR007964072</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230520004712.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">201005s2009 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/s10008-009-0854-x</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)SPR007964072</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(SPR)s10008-009-0854-x-e</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">540</subfield><subfield code="q">ASE</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">35.14</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">35.90</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Lee, Sung-Jai</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2009</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract The effects of Co alloying to Pt catalyst and Nafion pretreatment by $ NaClO_{4} $ solution on the rate-determining step (RDS) of oxygen reduction at Nafion-impregnated Pt-dispersed carbon (Pt/C) electrode were investigated as a function of the potential step ΔE employing potentiostatic current transient (PCT) technique. For this purpose, the cathodic PCTs were measured on the pure Nafion-impregnated and partially $ Na^{+} $-doped Nafion-impregnated Pt/C and PtCo/C electrodes in an oxygen-saturated 1 M $ H_{2} %$ SO_{4} $ solution and analyzed. From the shape of the cathodic PCTs and the dependence of the instantaneous current on the value of ΔE, it was confirmed that oxygen reduction at the pure Nafion-impregnated electrodes is controlled by charge transfer at the electrode surface mixed with oxygen diffusion in the solution below the transition potential step |ΔEtr| in absolute value, whereas oxygen reduction is purely governed by oxygen diffusion above |ΔEtr|. On the other hand, the RDS of oxygen reduction at the partially $ Na^{+} $-doped Nafion-impregnated electrodes below |ΔEtr| is charge transfer coupled with proton migration, whereas above |ΔEtr|, it becomes proton migration in the Nafion electrolyte instead of oxygen diffusion. Consequently, it is expected in real fuel cell system that the cell performance is improved by Co alloying since the electrode reaches the maximum diffusion (migration) current even at small value of |ΔE|, whereas the cell performance is aggravated by Nafion pretreatment due to the decrease in the maximum diffusion (migration) current.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Oxygen reduction</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Change in rate-determining step</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Pt-dispersed carbon</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">PtCo-dispersed carbon</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Partially Na</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">-doped Nafion</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Pyun, Su-Il</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Journal of solid state electrochemistry</subfield><subfield code="d">Berlin : Springer, 1997</subfield><subfield code="g">14(2009), 5 vom: 07. 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|
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Lee, Sung-Jai |
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Lee, Sung-Jai ddc 540 bkl 35.14 bkl 35.90 misc Oxygen reduction misc Change in rate-determining step misc Pt-dispersed carbon misc PtCo-dispersed carbon misc Partially Na misc -doped Nafion Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients |
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540 ASE 35.14 bkl 35.90 bkl Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients Oxygen reduction (dpeaa)DE-He213 Change in rate-determining step (dpeaa)DE-He213 Pt-dispersed carbon (dpeaa)DE-He213 PtCo-dispersed carbon (dpeaa)DE-He213 Partially Na (dpeaa)DE-He213 -doped Nafion (dpeaa)DE-He213 |
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ddc 540 bkl 35.14 bkl 35.90 misc Oxygen reduction misc Change in rate-determining step misc Pt-dispersed carbon misc PtCo-dispersed carbon misc Partially Na misc -doped Nafion |
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ddc 540 bkl 35.14 bkl 35.90 misc Oxygen reduction misc Change in rate-determining step misc Pt-dispersed carbon misc PtCo-dispersed carbon misc Partially Na misc -doped Nafion |
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Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients |
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Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients |
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Lee, Sung-Jai |
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Lee, Sung-Jai |
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10.1007/s10008-009-0854-x |
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verfasserin |
| title_sort |
kinetics of mixed-controlled oxygen reduction at nafion-impregnated pt-alloy-dispersed carbon electrode by analysis of cathodic current transients |
| title_auth |
Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients |
| abstract |
Abstract The effects of Co alloying to Pt catalyst and Nafion pretreatment by $ NaClO_{4} $ solution on the rate-determining step (RDS) of oxygen reduction at Nafion-impregnated Pt-dispersed carbon (Pt/C) electrode were investigated as a function of the potential step ΔE employing potentiostatic current transient (PCT) technique. For this purpose, the cathodic PCTs were measured on the pure Nafion-impregnated and partially $ Na^{+} $-doped Nafion-impregnated Pt/C and PtCo/C electrodes in an oxygen-saturated 1 M $ H_{2} %$ SO_{4} $ solution and analyzed. From the shape of the cathodic PCTs and the dependence of the instantaneous current on the value of ΔE, it was confirmed that oxygen reduction at the pure Nafion-impregnated electrodes is controlled by charge transfer at the electrode surface mixed with oxygen diffusion in the solution below the transition potential step |ΔEtr| in absolute value, whereas oxygen reduction is purely governed by oxygen diffusion above |ΔEtr|. On the other hand, the RDS of oxygen reduction at the partially $ Na^{+} $-doped Nafion-impregnated electrodes below |ΔEtr| is charge transfer coupled with proton migration, whereas above |ΔEtr|, it becomes proton migration in the Nafion electrolyte instead of oxygen diffusion. Consequently, it is expected in real fuel cell system that the cell performance is improved by Co alloying since the electrode reaches the maximum diffusion (migration) current even at small value of |ΔE|, whereas the cell performance is aggravated by Nafion pretreatment due to the decrease in the maximum diffusion (migration) current. |
| abstractGer |
Abstract The effects of Co alloying to Pt catalyst and Nafion pretreatment by $ NaClO_{4} $ solution on the rate-determining step (RDS) of oxygen reduction at Nafion-impregnated Pt-dispersed carbon (Pt/C) electrode were investigated as a function of the potential step ΔE employing potentiostatic current transient (PCT) technique. For this purpose, the cathodic PCTs were measured on the pure Nafion-impregnated and partially $ Na^{+} $-doped Nafion-impregnated Pt/C and PtCo/C electrodes in an oxygen-saturated 1 M $ H_{2} %$ SO_{4} $ solution and analyzed. From the shape of the cathodic PCTs and the dependence of the instantaneous current on the value of ΔE, it was confirmed that oxygen reduction at the pure Nafion-impregnated electrodes is controlled by charge transfer at the electrode surface mixed with oxygen diffusion in the solution below the transition potential step |ΔEtr| in absolute value, whereas oxygen reduction is purely governed by oxygen diffusion above |ΔEtr|. On the other hand, the RDS of oxygen reduction at the partially $ Na^{+} $-doped Nafion-impregnated electrodes below |ΔEtr| is charge transfer coupled with proton migration, whereas above |ΔEtr|, it becomes proton migration in the Nafion electrolyte instead of oxygen diffusion. Consequently, it is expected in real fuel cell system that the cell performance is improved by Co alloying since the electrode reaches the maximum diffusion (migration) current even at small value of |ΔE|, whereas the cell performance is aggravated by Nafion pretreatment due to the decrease in the maximum diffusion (migration) current. |
| abstract_unstemmed |
Abstract The effects of Co alloying to Pt catalyst and Nafion pretreatment by $ NaClO_{4} $ solution on the rate-determining step (RDS) of oxygen reduction at Nafion-impregnated Pt-dispersed carbon (Pt/C) electrode were investigated as a function of the potential step ΔE employing potentiostatic current transient (PCT) technique. For this purpose, the cathodic PCTs were measured on the pure Nafion-impregnated and partially $ Na^{+} $-doped Nafion-impregnated Pt/C and PtCo/C electrodes in an oxygen-saturated 1 M $ H_{2} %$ SO_{4} $ solution and analyzed. From the shape of the cathodic PCTs and the dependence of the instantaneous current on the value of ΔE, it was confirmed that oxygen reduction at the pure Nafion-impregnated electrodes is controlled by charge transfer at the electrode surface mixed with oxygen diffusion in the solution below the transition potential step |ΔEtr| in absolute value, whereas oxygen reduction is purely governed by oxygen diffusion above |ΔEtr|. On the other hand, the RDS of oxygen reduction at the partially $ Na^{+} $-doped Nafion-impregnated electrodes below |ΔEtr| is charge transfer coupled with proton migration, whereas above |ΔEtr|, it becomes proton migration in the Nafion electrolyte instead of oxygen diffusion. Consequently, it is expected in real fuel cell system that the cell performance is improved by Co alloying since the electrode reaches the maximum diffusion (migration) current even at small value of |ΔE|, whereas the cell performance is aggravated by Nafion pretreatment due to the decrease in the maximum diffusion (migration) current. |
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5 |
| title_short |
Kinetics of mixed-controlled oxygen reduction at nafion-impregnated Pt-alloy-dispersed carbon electrode by analysis of cathodic current transients |
| url |
https://dx.doi.org/10.1007/s10008-009-0854-x |
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Pyun, Su-Il |
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2024-07-03T16:24:59.276Z |
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| score |
7.4011555 |