Performance analysis of Pt/TiO2/C catalyst using a multi-scale and two-phase proton exchange membrane fuel cell model
We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite be...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Ghasemi, Masoomeh [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021transfer abstract |
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| Übergeordnetes Werk: |
Enthalten in: Computed tomographic morphometric analysis of lateral inclination C1 pedicle screw for atlantoaxial instability patients with a narrow C1 posterior arch - Zhang, Lei ELSEVIER, 2018, the journal of the International Society of Electrochemistry (ISE), New York, NY [u.a.] |
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| Übergeordnetes Werk: |
volume:366 ; year:2021 ; day:10 ; month:01 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.electacta.2020.137484 |
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| 520 | |a We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. | ||
| 520 | |a We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. | ||
| 700 | 1 | |a Choi, Jaeyoo |4 oth | |
| 700 | 1 | |a Ju, Hyunchul |4 oth | |
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10.1016/j.electacta.2020.137484 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001218.pica (DE-627)ELV052204928 (ELSEVIER)S0013-4686(20)31877-6 DE-627 ger DE-627 rakwb eng 610 VZ 44.00 bkl Ghasemi, Masoomeh verfasserin aut Performance analysis of Pt/TiO2/C catalyst using a multi-scale and two-phase proton exchange membrane fuel cell model 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. Choi, Jaeyoo oth Ju, Hyunchul oth Enthalten in Elsevier Zhang, Lei ELSEVIER Computed tomographic morphometric analysis of lateral inclination C1 pedicle screw for atlantoaxial instability patients with a narrow C1 posterior arch 2018 the journal of the International Society of Electrochemistry (ISE) New York, NY [u.a.] (DE-627)ELV001212419 volume:366 year:2021 day:10 month:01 pages:0 https://doi.org/10.1016/j.electacta.2020.137484 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.00 Medizin: Allgemeines VZ AR 366 2021 10 0110 0 |
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10.1016/j.electacta.2020.137484 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001218.pica (DE-627)ELV052204928 (ELSEVIER)S0013-4686(20)31877-6 DE-627 ger DE-627 rakwb eng 610 VZ 44.00 bkl Ghasemi, Masoomeh verfasserin aut Performance analysis of Pt/TiO2/C catalyst using a multi-scale and two-phase proton exchange membrane fuel cell model 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. Choi, Jaeyoo oth Ju, Hyunchul oth Enthalten in Elsevier Zhang, Lei ELSEVIER Computed tomographic morphometric analysis of lateral inclination C1 pedicle screw for atlantoaxial instability patients with a narrow C1 posterior arch 2018 the journal of the International Society of Electrochemistry (ISE) New York, NY [u.a.] (DE-627)ELV001212419 volume:366 year:2021 day:10 month:01 pages:0 https://doi.org/10.1016/j.electacta.2020.137484 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.00 Medizin: Allgemeines VZ AR 366 2021 10 0110 0 |
| allfields_unstemmed |
10.1016/j.electacta.2020.137484 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001218.pica (DE-627)ELV052204928 (ELSEVIER)S0013-4686(20)31877-6 DE-627 ger DE-627 rakwb eng 610 VZ 44.00 bkl Ghasemi, Masoomeh verfasserin aut Performance analysis of Pt/TiO2/C catalyst using a multi-scale and two-phase proton exchange membrane fuel cell model 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. Choi, Jaeyoo oth Ju, Hyunchul oth Enthalten in Elsevier Zhang, Lei ELSEVIER Computed tomographic morphometric analysis of lateral inclination C1 pedicle screw for atlantoaxial instability patients with a narrow C1 posterior arch 2018 the journal of the International Society of Electrochemistry (ISE) New York, NY [u.a.] (DE-627)ELV001212419 volume:366 year:2021 day:10 month:01 pages:0 https://doi.org/10.1016/j.electacta.2020.137484 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.00 Medizin: Allgemeines VZ AR 366 2021 10 0110 0 |
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10.1016/j.electacta.2020.137484 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001218.pica (DE-627)ELV052204928 (ELSEVIER)S0013-4686(20)31877-6 DE-627 ger DE-627 rakwb eng 610 VZ 44.00 bkl Ghasemi, Masoomeh verfasserin aut Performance analysis of Pt/TiO2/C catalyst using a multi-scale and two-phase proton exchange membrane fuel cell model 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. Choi, Jaeyoo oth Ju, Hyunchul oth Enthalten in Elsevier Zhang, Lei ELSEVIER Computed tomographic morphometric analysis of lateral inclination C1 pedicle screw for atlantoaxial instability patients with a narrow C1 posterior arch 2018 the journal of the International Society of Electrochemistry (ISE) New York, NY [u.a.] (DE-627)ELV001212419 volume:366 year:2021 day:10 month:01 pages:0 https://doi.org/10.1016/j.electacta.2020.137484 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.00 Medizin: Allgemeines VZ AR 366 2021 10 0110 0 |
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10.1016/j.electacta.2020.137484 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001218.pica (DE-627)ELV052204928 (ELSEVIER)S0013-4686(20)31877-6 DE-627 ger DE-627 rakwb eng 610 VZ 44.00 bkl Ghasemi, Masoomeh verfasserin aut Performance analysis of Pt/TiO2/C catalyst using a multi-scale and two-phase proton exchange membrane fuel cell model 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. Choi, Jaeyoo oth Ju, Hyunchul oth Enthalten in Elsevier Zhang, Lei ELSEVIER Computed tomographic morphometric analysis of lateral inclination C1 pedicle screw for atlantoaxial instability patients with a narrow C1 posterior arch 2018 the journal of the International Society of Electrochemistry (ISE) New York, NY [u.a.] (DE-627)ELV001212419 volume:366 year:2021 day:10 month:01 pages:0 https://doi.org/10.1016/j.electacta.2020.137484 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.00 Medizin: Allgemeines VZ AR 366 2021 10 0110 0 |
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Enthalten in Computed tomographic morphometric analysis of lateral inclination C1 pedicle screw for atlantoaxial instability patients with a narrow C1 posterior arch New York, NY [u.a.] volume:366 year:2021 day:10 month:01 pages:0 |
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Enthalten in Computed tomographic morphometric analysis of lateral inclination C1 pedicle screw for atlantoaxial instability patients with a narrow C1 posterior arch New York, NY [u.a.] volume:366 year:2021 day:10 month:01 pages:0 |
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Computed tomographic morphometric analysis of lateral inclination C1 pedicle screw for atlantoaxial instability patients with a narrow C1 posterior arch |
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In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. 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Performance analysis of Pt/TiO2/C catalyst using a multi-scale and two-phase proton exchange membrane fuel cell model |
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We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. |
| abstractGer |
We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. |
| abstract_unstemmed |
We present a detailed theoretical investigation into the effect of using titanium dioxide (TiO2) as support for Pt nanoparticles in proton-exchange membrane fuel cells (PEMFCs). In this context, TiO2 was exhibited excellent resistance towards carbon corrosion and Pt particle agglomeration despite being a semi-conductive metal with poor electric conductivity. The major focus of this study is on elucidating the merits and demerits of using a TiO2 support material in terms of PEMFC performance and durability. For the first time, the micro-scale catalyst model was improved and used to analyze the effects of electron transport in Pt/TiO2/C catalyst structure. The new model is coupled with a three-dimensional two-phase PEMFC model and multi-scale simulations are carried out for various PEMFCs, designed with both Pt/TiO2/C and traditional Pt/C catalysts, for comparison. The model predictions highlight that the suppression of Pt particle growth via the Pt/TiO2/C catalyst structure is clearly advantageous to maintain good catalyst performance during long-term PEMFC operations. However, the additional electronic ohmic loss by the TiO2 particles can be significant during high current density operations (e.g. 20 mV at 1.0 A/cm2). This study illustrates that the present multi-scale PEMFC model is a valuable instrument for designing and optimizing porous catalyst structures with various candidate catalyst support materials. |
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