期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 87, 期 -, 页码 86-90出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2018.01.004
关键词
Hydrogen; Fuel cell; Ionomer Thin-film; Confinement; Platinum Interface
资金
- National Science Foundation [DGE-1106400]
- Fuel Cell Performance and Durability Consortium, by the Fuel Cell Technologies Office, Office of Energy Efficiency and Renewable Energy, of the U.S. Department of Energy [DE-AC02-05CH11231]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- Army Research Office at the Department of Defense [AWD00000675]
Local gas transport limitation attributed to the ionomer thin-film in the catalyst layer is a major deterrent to widespread commercialization of polymer-electrolyte fuel cells. So far functionality and limitations of these thin-films have been assumed identical in the anode and cathode. In this study, Nafion ionomer thin-films on platinum(Pt) support were exposed to H-2 and air as model schemes, mimicking anode and cathode catalyst layers. Findings indicate decreased swelling, increased densification of ionomer matrix, and increased humidity-induced aging rates in reducing environment, compared to oxidizing and inert environments. Observed phenomenon could be related to underlying Pt-gas interaction dictating Pt-ionomer behavior. Presented results could have significant implications about the disparate behavior of ionomer thin-film in anode and cathode catalyst layers.
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