Molecular Understanding of the Role of Catalyst Particle Arrangement in Local Mass Transport Resistance for Fuel Cells
Abstract Platinum (Pt) catalyst performance loss caused by a high local oxygen transport resistance is an urgent problem to be solved for proton exchange membrane fuel cells (PEMFCs). Rationally arranging Pt particles on carbon support is the primary approach for reducing mass transport resistance....
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202409755 |
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| author | Aoxin Ran Linhao Fan Chasen Tongsh Jiaqi Wang Zhengguo Qin Qing Du Meng Ni Kui Jiao |
| author_facet | Aoxin Ran Linhao Fan Chasen Tongsh Jiaqi Wang Zhengguo Qin Qing Du Meng Ni Kui Jiao |
| author_sort | Aoxin Ran |
| collection | DOAJ |
| description | Abstract Platinum (Pt) catalyst performance loss caused by a high local oxygen transport resistance is an urgent problem to be solved for proton exchange membrane fuel cells (PEMFCs). Rationally arranging Pt particles on carbon support is the primary approach for reducing mass transport resistance. Herein, using a unique method coupling Hybrid Reverse Monte Carlo, molecular dynamics simulations, and experimental measurements, a Pt particle arrangement strategy is proposed to reduce local oxygen transport resistance, based on a molecular‐level understanding of its impact. The densely arranged Pt particles with a small interparticle distance lead to the denser ionomer layer due to the co‐attraction effect, leading to a high local oxygen transport resistance. The nonuniformly arranged Pt particles with various interparticle distances cause the heterogeneous ionomer density, inducing the heterogeneous oxygen transport. Increasing the Pt‐Pt interparticle distance from 2 to 5 nm substantially reduces the local oxygen transport resistance by over 50%. The uniform arrangement of Pt particles makes the ionomer layer density more homogeneous, resulting in more uniform oxygen transport. Therefore, uniformly arranging Pt particles with an interparticle distance of >5 nm on carbon support is preferred for reducing local oxygen transport resistance and improving the homogeneity of oxygen transport. |
| format | Article |
| id | doaj-art-e3a9d3848c014ee3913ba062c11d1320 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-e3a9d3848c014ee3913ba062c11d13202025-02-04T13:14:54ZengWileyAdvanced Science2198-38442025-02-01125n/an/a10.1002/advs.202409755Molecular Understanding of the Role of Catalyst Particle Arrangement in Local Mass Transport Resistance for Fuel CellsAoxin Ran0Linhao Fan1Chasen Tongsh2Jiaqi Wang3Zhengguo Qin4Qing Du5Meng Ni6Kui Jiao7State Key Laboratory of Engines Tianjin University Tianjin 300200 ChinaState Key Laboratory of Engines Tianjin University Tianjin 300200 ChinaState Key Laboratory of Engines Tianjin University Tianjin 300200 ChinaState Key Laboratory of Engines Tianjin University Tianjin 300200 ChinaState Key Laboratory of Engines Tianjin University Tianjin 300200 ChinaState Key Laboratory of Engines Tianjin University Tianjin 300200 ChinaDepartment of Building and Real Estate Research Institute for Sustainable Urban Development (RISUD) & Research Institute for Smart Energy (RISE) Hong Kong Polytechnic University Hong Kong 100872 ChinaState Key Laboratory of Engines Tianjin University Tianjin 300200 ChinaAbstract Platinum (Pt) catalyst performance loss caused by a high local oxygen transport resistance is an urgent problem to be solved for proton exchange membrane fuel cells (PEMFCs). Rationally arranging Pt particles on carbon support is the primary approach for reducing mass transport resistance. Herein, using a unique method coupling Hybrid Reverse Monte Carlo, molecular dynamics simulations, and experimental measurements, a Pt particle arrangement strategy is proposed to reduce local oxygen transport resistance, based on a molecular‐level understanding of its impact. The densely arranged Pt particles with a small interparticle distance lead to the denser ionomer layer due to the co‐attraction effect, leading to a high local oxygen transport resistance. The nonuniformly arranged Pt particles with various interparticle distances cause the heterogeneous ionomer density, inducing the heterogeneous oxygen transport. Increasing the Pt‐Pt interparticle distance from 2 to 5 nm substantially reduces the local oxygen transport resistance by over 50%. The uniform arrangement of Pt particles makes the ionomer layer density more homogeneous, resulting in more uniform oxygen transport. Therefore, uniformly arranging Pt particles with an interparticle distance of >5 nm on carbon support is preferred for reducing local oxygen transport resistance and improving the homogeneity of oxygen transport.https://doi.org/10.1002/advs.202409755dispersityfuel cellsinterparticle distanceoxygen transportuniformity |
| spellingShingle | Aoxin Ran Linhao Fan Chasen Tongsh Jiaqi Wang Zhengguo Qin Qing Du Meng Ni Kui Jiao Molecular Understanding of the Role of Catalyst Particle Arrangement in Local Mass Transport Resistance for Fuel Cells Advanced Science dispersity fuel cells interparticle distance oxygen transport uniformity |
| title | Molecular Understanding of the Role of Catalyst Particle Arrangement in Local Mass Transport Resistance for Fuel Cells |
| title_full | Molecular Understanding of the Role of Catalyst Particle Arrangement in Local Mass Transport Resistance for Fuel Cells |
| title_fullStr | Molecular Understanding of the Role of Catalyst Particle Arrangement in Local Mass Transport Resistance for Fuel Cells |
| title_full_unstemmed | Molecular Understanding of the Role of Catalyst Particle Arrangement in Local Mass Transport Resistance for Fuel Cells |
| title_short | Molecular Understanding of the Role of Catalyst Particle Arrangement in Local Mass Transport Resistance for Fuel Cells |
| title_sort | molecular understanding of the role of catalyst particle arrangement in local mass transport resistance for fuel cells |
| topic | dispersity fuel cells interparticle distance oxygen transport uniformity |
| url | https://doi.org/10.1002/advs.202409755 |
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