Enhancement of surface exchange and oxygen diffusion of Sr
The mechanism of interaction between gaseous oxygen and the Sr1.95Fe1.4Ni0.1Mo0.5O6–δ promising material for cathodes of SOFC has been investigated by two isotopic methods: the pulse isotope exchange and the oxygen isotope exchange with the gas phase analysis, making it possible to obtain and compar...
Ausführliche Beschreibung
Autor*in: |
Porotnikova, N.M. [verfasserIn] Khodimchuk, A.V. [verfasserIn] Zakharov, D.M. [verfasserIn] Bogdanovich, N.M. [verfasserIn] Osinkin, D.A. [verfasserIn] |
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Format: |
E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2022 |
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Schlagwörter: |
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Übergeordnetes Werk: |
Enthalten in: Applied surface science - Amsterdam : Elsevier, 1985, 613 |
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Übergeordnetes Werk: |
volume:613 |
DOI / URN: |
10.1016/j.apsusc.2022.156015 |
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Katalog-ID: |
ELV00902607X |
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245 | 1 | 0 | |a Enhancement of surface exchange and oxygen diffusion of Sr |
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520 | |a The mechanism of interaction between gaseous oxygen and the Sr1.95Fe1.4Ni0.1Mo0.5O6–δ promising material for cathodes of SOFC has been investigated by two isotopic methods: the pulse isotope exchange and the oxygen isotope exchange with the gas phase analysis, making it possible to obtain and compare the kinetic parameters under equilibrium conditions and the mixture gas carrier flow under the sample, which extends understanding of processes and makes experimental conditions of the second case closer to real operating conditions of electrode material. The time dependences of changes in 16O2, 16O18O and 18O2 over the sample allowed us to calculate the concentration of 18O labeled oxygen (α) at the temperatures ranging from 300 to 800 °C. The oxygen exchange rate (r H, atom/(cm2 × s)), the oxygen diffusion coefficient (D, cm2/s), the corresponding rates of elementary processes of dissociative adsorption (r a, atom/(cm2 × s)) and oxygen incorporation in the lattice (r i, atom/(cm2 × s)) are calculated. The results of two independent isotopic methods were analyzed and revealed a good agreement of the obtained data. The effect of modifying Sr2Fe1.5Mo0.5O6–δ by introducing deficiency in the Sr-sublattice and Ni-doping in the Fe-sublattice on the kinetic parameters is discussed. | ||
650 | 4 | |a A-site deficiency | |
650 | 4 | |a Fe-site substitution | |
650 | 4 | |a Oxygen transport | |
650 | 4 | |a Rate-determining step | |
650 | 4 | |a Oxygen diffusion | |
650 | 4 | |a Sr | |
700 | 1 | |a Khodimchuk, A.V. |e verfasserin |4 aut | |
700 | 1 | |a Zakharov, D.M. |e verfasserin |0 (orcid)0000-0002-6881-6802 |4 aut | |
700 | 1 | |a Bogdanovich, N.M. |e verfasserin |0 (orcid)0000-0002-8284-5562 |4 aut | |
700 | 1 | |a Osinkin, D.A. |e verfasserin |0 (orcid)0000-0001-6396-8551 |4 aut | |
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2022 |
allfields |
10.1016/j.apsusc.2022.156015 doi (DE-627)ELV00902607X (ELSEVIER)S0169-4332(22)03543-7 DE-627 ger DE-627 rda eng 670 530 660 VZ 33.68 bkl 35.18 bkl 52.78 bkl Porotnikova, N.M. verfasserin (orcid)0000-0001-5284-4553 aut Enhancement of surface exchange and oxygen diffusion of Sr 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The mechanism of interaction between gaseous oxygen and the Sr1.95Fe1.4Ni0.1Mo0.5O6–δ promising material for cathodes of SOFC has been investigated by two isotopic methods: the pulse isotope exchange and the oxygen isotope exchange with the gas phase analysis, making it possible to obtain and compare the kinetic parameters under equilibrium conditions and the mixture gas carrier flow under the sample, which extends understanding of processes and makes experimental conditions of the second case closer to real operating conditions of electrode material. The time dependences of changes in 16O2, 16O18O and 18O2 over the sample allowed us to calculate the concentration of 18O labeled oxygen (α) at the temperatures ranging from 300 to 800 °C. The oxygen exchange rate (r H, atom/(cm2 × s)), the oxygen diffusion coefficient (D, cm2/s), the corresponding rates of elementary processes of dissociative adsorption (r a, atom/(cm2 × s)) and oxygen incorporation in the lattice (r i, atom/(cm2 × s)) are calculated. The results of two independent isotopic methods were analyzed and revealed a good agreement of the obtained data. The effect of modifying Sr2Fe1.5Mo0.5O6–δ by introducing deficiency in the Sr-sublattice and Ni-doping in the Fe-sublattice on the kinetic parameters is discussed. A-site deficiency Fe-site substitution Oxygen transport Rate-determining step Oxygen diffusion Sr Khodimchuk, A.V. verfasserin aut Zakharov, D.M. verfasserin (orcid)0000-0002-6881-6802 aut Bogdanovich, N.M. verfasserin (orcid)0000-0002-8284-5562 aut Osinkin, D.A. verfasserin (orcid)0000-0001-6396-8551 aut Enthalten in Applied surface science Amsterdam : Elsevier, 1985 613 Online-Ressource (DE-627)312151128 (DE-600)2002520-8 (DE-576)094476985 nnns volume:613 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 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_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 33.68 Oberflächen Dünne Schichten Grenzflächen Physik VZ 35.18 Kolloidchemie Grenzflächenchemie VZ 52.78 Oberflächentechnik Wärmebehandlung VZ AR 613 |
spelling |
10.1016/j.apsusc.2022.156015 doi (DE-627)ELV00902607X (ELSEVIER)S0169-4332(22)03543-7 DE-627 ger DE-627 rda eng 670 530 660 VZ 33.68 bkl 35.18 bkl 52.78 bkl Porotnikova, N.M. verfasserin (orcid)0000-0001-5284-4553 aut Enhancement of surface exchange and oxygen diffusion of Sr 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The mechanism of interaction between gaseous oxygen and the Sr1.95Fe1.4Ni0.1Mo0.5O6–δ promising material for cathodes of SOFC has been investigated by two isotopic methods: the pulse isotope exchange and the oxygen isotope exchange with the gas phase analysis, making it possible to obtain and compare the kinetic parameters under equilibrium conditions and the mixture gas carrier flow under the sample, which extends understanding of processes and makes experimental conditions of the second case closer to real operating conditions of electrode material. The time dependences of changes in 16O2, 16O18O and 18O2 over the sample allowed us to calculate the concentration of 18O labeled oxygen (α) at the temperatures ranging from 300 to 800 °C. The oxygen exchange rate (r H, atom/(cm2 × s)), the oxygen diffusion coefficient (D, cm2/s), the corresponding rates of elementary processes of dissociative adsorption (r a, atom/(cm2 × s)) and oxygen incorporation in the lattice (r i, atom/(cm2 × s)) are calculated. The results of two independent isotopic methods were analyzed and revealed a good agreement of the obtained data. The effect of modifying Sr2Fe1.5Mo0.5O6–δ by introducing deficiency in the Sr-sublattice and Ni-doping in the Fe-sublattice on the kinetic parameters is discussed. A-site deficiency Fe-site substitution Oxygen transport Rate-determining step Oxygen diffusion Sr Khodimchuk, A.V. verfasserin aut Zakharov, D.M. verfasserin (orcid)0000-0002-6881-6802 aut Bogdanovich, N.M. verfasserin (orcid)0000-0002-8284-5562 aut Osinkin, D.A. verfasserin (orcid)0000-0001-6396-8551 aut Enthalten in Applied surface science Amsterdam : Elsevier, 1985 613 Online-Ressource (DE-627)312151128 (DE-600)2002520-8 (DE-576)094476985 nnns volume:613 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 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_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 33.68 Oberflächen Dünne Schichten Grenzflächen Physik VZ 35.18 Kolloidchemie Grenzflächenchemie VZ 52.78 Oberflächentechnik Wärmebehandlung VZ AR 613 |
allfields_unstemmed |
10.1016/j.apsusc.2022.156015 doi (DE-627)ELV00902607X (ELSEVIER)S0169-4332(22)03543-7 DE-627 ger DE-627 rda eng 670 530 660 VZ 33.68 bkl 35.18 bkl 52.78 bkl Porotnikova, N.M. verfasserin (orcid)0000-0001-5284-4553 aut Enhancement of surface exchange and oxygen diffusion of Sr 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The mechanism of interaction between gaseous oxygen and the Sr1.95Fe1.4Ni0.1Mo0.5O6–δ promising material for cathodes of SOFC has been investigated by two isotopic methods: the pulse isotope exchange and the oxygen isotope exchange with the gas phase analysis, making it possible to obtain and compare the kinetic parameters under equilibrium conditions and the mixture gas carrier flow under the sample, which extends understanding of processes and makes experimental conditions of the second case closer to real operating conditions of electrode material. The time dependences of changes in 16O2, 16O18O and 18O2 over the sample allowed us to calculate the concentration of 18O labeled oxygen (α) at the temperatures ranging from 300 to 800 °C. The oxygen exchange rate (r H, atom/(cm2 × s)), the oxygen diffusion coefficient (D, cm2/s), the corresponding rates of elementary processes of dissociative adsorption (r a, atom/(cm2 × s)) and oxygen incorporation in the lattice (r i, atom/(cm2 × s)) are calculated. The results of two independent isotopic methods were analyzed and revealed a good agreement of the obtained data. The effect of modifying Sr2Fe1.5Mo0.5O6–δ by introducing deficiency in the Sr-sublattice and Ni-doping in the Fe-sublattice on the kinetic parameters is discussed. A-site deficiency Fe-site substitution Oxygen transport Rate-determining step Oxygen diffusion Sr Khodimchuk, A.V. verfasserin aut Zakharov, D.M. verfasserin (orcid)0000-0002-6881-6802 aut Bogdanovich, N.M. verfasserin (orcid)0000-0002-8284-5562 aut Osinkin, D.A. verfasserin (orcid)0000-0001-6396-8551 aut Enthalten in Applied surface science Amsterdam : Elsevier, 1985 613 Online-Ressource (DE-627)312151128 (DE-600)2002520-8 (DE-576)094476985 nnns volume:613 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 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_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 33.68 Oberflächen Dünne Schichten Grenzflächen Physik VZ 35.18 Kolloidchemie Grenzflächenchemie VZ 52.78 Oberflächentechnik Wärmebehandlung VZ AR 613 |
allfieldsGer |
10.1016/j.apsusc.2022.156015 doi (DE-627)ELV00902607X (ELSEVIER)S0169-4332(22)03543-7 DE-627 ger DE-627 rda eng 670 530 660 VZ 33.68 bkl 35.18 bkl 52.78 bkl Porotnikova, N.M. verfasserin (orcid)0000-0001-5284-4553 aut Enhancement of surface exchange and oxygen diffusion of Sr 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The mechanism of interaction between gaseous oxygen and the Sr1.95Fe1.4Ni0.1Mo0.5O6–δ promising material for cathodes of SOFC has been investigated by two isotopic methods: the pulse isotope exchange and the oxygen isotope exchange with the gas phase analysis, making it possible to obtain and compare the kinetic parameters under equilibrium conditions and the mixture gas carrier flow under the sample, which extends understanding of processes and makes experimental conditions of the second case closer to real operating conditions of electrode material. The time dependences of changes in 16O2, 16O18O and 18O2 over the sample allowed us to calculate the concentration of 18O labeled oxygen (α) at the temperatures ranging from 300 to 800 °C. The oxygen exchange rate (r H, atom/(cm2 × s)), the oxygen diffusion coefficient (D, cm2/s), the corresponding rates of elementary processes of dissociative adsorption (r a, atom/(cm2 × s)) and oxygen incorporation in the lattice (r i, atom/(cm2 × s)) are calculated. The results of two independent isotopic methods were analyzed and revealed a good agreement of the obtained data. The effect of modifying Sr2Fe1.5Mo0.5O6–δ by introducing deficiency in the Sr-sublattice and Ni-doping in the Fe-sublattice on the kinetic parameters is discussed. A-site deficiency Fe-site substitution Oxygen transport Rate-determining step Oxygen diffusion Sr Khodimchuk, A.V. verfasserin aut Zakharov, D.M. verfasserin (orcid)0000-0002-6881-6802 aut Bogdanovich, N.M. verfasserin (orcid)0000-0002-8284-5562 aut Osinkin, D.A. verfasserin (orcid)0000-0001-6396-8551 aut Enthalten in Applied surface science Amsterdam : Elsevier, 1985 613 Online-Ressource (DE-627)312151128 (DE-600)2002520-8 (DE-576)094476985 nnns volume:613 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 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_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 33.68 Oberflächen Dünne Schichten Grenzflächen Physik VZ 35.18 Kolloidchemie Grenzflächenchemie VZ 52.78 Oberflächentechnik Wärmebehandlung VZ AR 613 |
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10.1016/j.apsusc.2022.156015 doi (DE-627)ELV00902607X (ELSEVIER)S0169-4332(22)03543-7 DE-627 ger DE-627 rda eng 670 530 660 VZ 33.68 bkl 35.18 bkl 52.78 bkl Porotnikova, N.M. verfasserin (orcid)0000-0001-5284-4553 aut Enhancement of surface exchange and oxygen diffusion of Sr 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The mechanism of interaction between gaseous oxygen and the Sr1.95Fe1.4Ni0.1Mo0.5O6–δ promising material for cathodes of SOFC has been investigated by two isotopic methods: the pulse isotope exchange and the oxygen isotope exchange with the gas phase analysis, making it possible to obtain and compare the kinetic parameters under equilibrium conditions and the mixture gas carrier flow under the sample, which extends understanding of processes and makes experimental conditions of the second case closer to real operating conditions of electrode material. The time dependences of changes in 16O2, 16O18O and 18O2 over the sample allowed us to calculate the concentration of 18O labeled oxygen (α) at the temperatures ranging from 300 to 800 °C. The oxygen exchange rate (r H, atom/(cm2 × s)), the oxygen diffusion coefficient (D, cm2/s), the corresponding rates of elementary processes of dissociative adsorption (r a, atom/(cm2 × s)) and oxygen incorporation in the lattice (r i, atom/(cm2 × s)) are calculated. The results of two independent isotopic methods were analyzed and revealed a good agreement of the obtained data. The effect of modifying Sr2Fe1.5Mo0.5O6–δ by introducing deficiency in the Sr-sublattice and Ni-doping in the Fe-sublattice on the kinetic parameters is discussed. A-site deficiency Fe-site substitution Oxygen transport Rate-determining step Oxygen diffusion Sr Khodimchuk, A.V. verfasserin aut Zakharov, D.M. verfasserin (orcid)0000-0002-6881-6802 aut Bogdanovich, N.M. verfasserin (orcid)0000-0002-8284-5562 aut Osinkin, D.A. verfasserin (orcid)0000-0001-6396-8551 aut Enthalten in Applied surface science Amsterdam : Elsevier, 1985 613 Online-Ressource (DE-627)312151128 (DE-600)2002520-8 (DE-576)094476985 nnns volume:613 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 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_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 33.68 Oberflächen Dünne Schichten Grenzflächen Physik VZ 35.18 Kolloidchemie Grenzflächenchemie VZ 52.78 Oberflächentechnik Wärmebehandlung VZ AR 613 |
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Porotnikova, N.M. @@aut@@ Khodimchuk, A.V. @@aut@@ Zakharov, D.M. @@aut@@ Bogdanovich, N.M. @@aut@@ Osinkin, D.A. @@aut@@ |
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enhancement of surface exchange and oxygen diffusion of sr |
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Enhancement of surface exchange and oxygen diffusion of Sr |
abstract |
The mechanism of interaction between gaseous oxygen and the Sr1.95Fe1.4Ni0.1Mo0.5O6–δ promising material for cathodes of SOFC has been investigated by two isotopic methods: the pulse isotope exchange and the oxygen isotope exchange with the gas phase analysis, making it possible to obtain and compare the kinetic parameters under equilibrium conditions and the mixture gas carrier flow under the sample, which extends understanding of processes and makes experimental conditions of the second case closer to real operating conditions of electrode material. The time dependences of changes in 16O2, 16O18O and 18O2 over the sample allowed us to calculate the concentration of 18O labeled oxygen (α) at the temperatures ranging from 300 to 800 °C. The oxygen exchange rate (r H, atom/(cm2 × s)), the oxygen diffusion coefficient (D, cm2/s), the corresponding rates of elementary processes of dissociative adsorption (r a, atom/(cm2 × s)) and oxygen incorporation in the lattice (r i, atom/(cm2 × s)) are calculated. The results of two independent isotopic methods were analyzed and revealed a good agreement of the obtained data. The effect of modifying Sr2Fe1.5Mo0.5O6–δ by introducing deficiency in the Sr-sublattice and Ni-doping in the Fe-sublattice on the kinetic parameters is discussed. |
abstractGer |
The mechanism of interaction between gaseous oxygen and the Sr1.95Fe1.4Ni0.1Mo0.5O6–δ promising material for cathodes of SOFC has been investigated by two isotopic methods: the pulse isotope exchange and the oxygen isotope exchange with the gas phase analysis, making it possible to obtain and compare the kinetic parameters under equilibrium conditions and the mixture gas carrier flow under the sample, which extends understanding of processes and makes experimental conditions of the second case closer to real operating conditions of electrode material. The time dependences of changes in 16O2, 16O18O and 18O2 over the sample allowed us to calculate the concentration of 18O labeled oxygen (α) at the temperatures ranging from 300 to 800 °C. The oxygen exchange rate (r H, atom/(cm2 × s)), the oxygen diffusion coefficient (D, cm2/s), the corresponding rates of elementary processes of dissociative adsorption (r a, atom/(cm2 × s)) and oxygen incorporation in the lattice (r i, atom/(cm2 × s)) are calculated. The results of two independent isotopic methods were analyzed and revealed a good agreement of the obtained data. The effect of modifying Sr2Fe1.5Mo0.5O6–δ by introducing deficiency in the Sr-sublattice and Ni-doping in the Fe-sublattice on the kinetic parameters is discussed. |
abstract_unstemmed |
The mechanism of interaction between gaseous oxygen and the Sr1.95Fe1.4Ni0.1Mo0.5O6–δ promising material for cathodes of SOFC has been investigated by two isotopic methods: the pulse isotope exchange and the oxygen isotope exchange with the gas phase analysis, making it possible to obtain and compare the kinetic parameters under equilibrium conditions and the mixture gas carrier flow under the sample, which extends understanding of processes and makes experimental conditions of the second case closer to real operating conditions of electrode material. The time dependences of changes in 16O2, 16O18O and 18O2 over the sample allowed us to calculate the concentration of 18O labeled oxygen (α) at the temperatures ranging from 300 to 800 °C. The oxygen exchange rate (r H, atom/(cm2 × s)), the oxygen diffusion coefficient (D, cm2/s), the corresponding rates of elementary processes of dissociative adsorption (r a, atom/(cm2 × s)) and oxygen incorporation in the lattice (r i, atom/(cm2 × s)) are calculated. The results of two independent isotopic methods were analyzed and revealed a good agreement of the obtained data. The effect of modifying Sr2Fe1.5Mo0.5O6–δ by introducing deficiency in the Sr-sublattice and Ni-doping in the Fe-sublattice on the kinetic parameters is discussed. |
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score |
7.4003057 |