期刊
JOURNAL OF POWER SOURCES
卷 263, 期 -, 页码 163-174出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.04.020
关键词
Nanostructured thin film; NSTF; Catalyst layers; PEM-FC; Automotive fuel cells; STXM
资金
- NSERC (Canada) through Discovery and Collaborative Research and Development
- Canada Research Chairs Program
- Catalysis Research for Polymer Electrolyte Fuel Cells (CaRPE-FC) network
- Canada Foundation for Innovation (CFI)
- NSERC
- Canadian Institutes of Health Research
- National Research Council (NRC)
- University of Saskatchewan
- Director, Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences Division of the U.S. Department of Energy [DE-AC02-05CH11231]
Scanning transmission X-ray microscopy (STXM) has been applied to characterize nano structured thin film (NSTF) catalysts implemented as electrode materials in proton-exchange-membrane (PEM) fuel cells. STXM is used to study all chemical constituents at various stages in the fabrication process, from the perylene red (PR149) starting material, through the formation of the uncoated perylene whiskers, their coated form with Pt-based catalyst, and toward the NSTF anode fully integrated into the catalyst coated membrane (CCM). CCM samples were examined prior to operational testing and after several different accelerated testing protocols: start-up/shut-down (SU/SD), and reversal tests. It was found that, while the perylene support material is present in the pre-test samples, it was completely absent in the post-test samples. We attribute this loss of perylene material to the presence of cracks in the catalyst combined with intensive hydrogenation processes happening at the anode during operation. Despite the loss of the perylene support, the platinum shells forming the NSTF anode catalyst layer performed well during the tests. (C) 2014 Elsevier B.V. All rights reserved.
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