期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 42, 期 10, 页码 7241-7245出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2016.11.002
关键词
Catalyst layer; Pt gradient distribution; Pore structure gradient distribution; PEMFC
资金
- National Science and Technology Support Project of China [2015BAG06B00]
- PetroChina Innovation Foundation [2016D-5007-0501]
- Fundamental Research Funds for the Central Universities of China at Tongji University [1600219253, 1700219105]
The catalyst layer is a key component in the proton exchange membrane fuel cell (PEMFC) for it is where the conversion of fuel into electricity takes place. Traditionally, electrocatalyst is uniformly distributed in the catalyst layers of the membrane electrode assembly (MEA) and the high Pt consumption in catalyst layers blocks the widely use of PEMFC. Here we proposed a Pt content and pore structure gradient distributed, two-layer catalyst layer for PEMFC to improve the MEA performance. Energy-dispersive X-ray (EDX) spectroscopy results show Pt nanoparticles gradient distributed on the vertical direction of catalyst layer. The pore size in the Pt poor layer is larger than that in the Pt rich layer, and this structure can improve the Pt utilization and enhance the mass transfer in the catalyst layer. The single cell test result shows this new MEA has a better performance (11%) than the traditional MEA. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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