Influence of Ionomer Content in Pt/mesoporous SnO2 Electrodes on PEM Fuel Cell Performance
The search for more durable supports for oxygen reduction reaction (ORR) catalyst is a topic of increasing importance in the development of polymer electrolyte fuel cells (PEFCs). Recently, tin oxide (SnO _2 ) supports have garnered attention because of their high oxidative stability. However, impro...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
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| Series: | ECS Advances |
| Subjects: | |
| Online Access: | https://doi.org/10.1149/2754-2734/adb31b |
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| Summary: | The search for more durable supports for oxygen reduction reaction (ORR) catalyst is a topic of increasing importance in the development of polymer electrolyte fuel cells (PEFCs). Recently, tin oxide (SnO _2 ) supports have garnered attention because of their high oxidative stability. However, improving their cell performance, particularly under wet conditions, remains a challenge before their successful deployment. Herein, we expand on our previous work on carbon-free mesoporous SnO _2 -based catalyst supports and investigate the effects of ionomer content on ORR performance and cathode catalyst layer (CCL) structure. Optimization of the ionomer content resulted in a more uniform ionomer distribution and alleviation of CCL flooding and a 2-fold increase in catalytic activity under wet conditions. As a result, the mesoporous SnO _2 -based catalyst supports exhibited comparable performance to solid-core carbon supports under both wet and dry conditions. Finally, we present a summary of our progress on the development of mesoporous SnO _2 -based catalyst support and highlight critical areas of improvements needed towards their future deployment. |
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| ISSN: | 2754-2734 |