期刊
ACS CATALYSIS
卷 8, 期 10, 页码 9429-9439出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.8b03227
关键词
anion exchange membrane fuel cells; hydrogen oxidation catalyst; palladium; hydrogen absorption; phenyl adsorption; cation adsorption; catalyst-ionomer interface
资金
- U.S. Department of Energy (US DOE), Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (FCTO) [DE-ACS2-06NA25396]
- US DOE, ARPA-E [IONICS DE-AR0000769]
- Nancy & Stephan Grand Technion Energy Program (GTEP)
- European Union's Horizon 2020 research and innovation program [721065]
- Ministry of Science, Technology & Space of Israel [3-12940, 3-12948]
- Israel Science Foundation (ISF) [1481/17]
- Israeli Committee of High Education
- Israeli Prime Minister office via the INREP project
- Israel Innovation Authority through the KAMIN program [60503]
- Ministry of National Infrastructure, Energy and Water Resources of Israel [3-13671]
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
Material interactions at the polymer electrolytes-catalyst interface play a significant role in the catalytic efficiency of alkaline anion-exchange membrane fuel cells (AEMFCs). In this work, the surface adsorption behaviors of the cation-hydroxide-water and phenyl groups of polymer electrolytes on Pd- and Pt-based catalysts are investigated using two Pd-based hydrogen oxidation catalysts-Pd/C and Pd/C-CeO2- and two Pt-based catalysts-Pt/C and Pt-Ru/C. The rotating disk electrode study and complementary density functional theory calculations indicate that relatively low coadsorption of cation-hydroxide-water of the Pd-based catalysts enhances the hydrogen oxidation activity, yet substantial hydrogenation of the surface adsorbed phenyl groups reduces the hydrogen oxidation activity. The adsorption-driven interfacial behaviors of the Pd- and Pt-based catalysts correlate well with the AEMFC performance and short-term stability. This study gives insight into the potential use of non-Pt hydrogen oxidation reaction catalysts that have different surface adsorption characteristics in advanced AEMFCs.
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