Surface Adsorption Affects the Performance of Alkaline Anion-Exchange Membrane Fuel Cells
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Chemical and Biological Engineering. Center for Micro-Engineered Materials (CMEM); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Chemistry and Chemical Biology
- Inst. of Chemistry of Organometallic Compounds (CNR-ICCOM), Florence (Italy)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Materials Science and Engineering Center
- Technion−Israel Inst. of Technology, Haifa (Israel). The Wolfson Dept. of Chemical Engineering
Material interactions at the polymer electrolytes–catalyst interface play a significant role in the catalytic efficiency of alkaline anion-exchange membrane fuel cells (AEMFCs). 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. Finally, this study gives insight into the potential use of non-Pt hydrogen oxidation reaction catalysts that have different surface adsorption characteristics in advanced AEMFCs.
- Research Organization:
- Los Alamos National Laboratory (LANL)
- Sponsoring Organization:
- European Union (EU); Israel Innovation Authority; Israel Science Foundation (ISF); Ministry of National Infrastructures, Energy and Water Resources (Israel); Ministry of Science, Technology and Space (Israel); Nancy and Stephen Grand Technion Energy Program (GTEP) (Israel); USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F); USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231; AC52-06NA25396; AR0000769
- OSTI ID:
- 1475341
- Report Number(s):
- LA-UR-18-23616
- Journal Information:
- ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 10 Vol. 8; ISSN 2155-5435
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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