Impact of ionomer adsorption on alkaline hydrogen oxidation activity and fuel cell performance
Journal Article
·
· Current Opinion in Electrochemistry
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)
The adsorption of the ionomer components significantly impacts the activity of hydrogen oxidation reaction (HOR) catalysts under high pH conditions. Two specific adsorptions, i.e., (i) cation-hydroxide-water co-adsorption and (ii) phenyl group adsorption, on the surface of platinum group metal HOR catalysts were identified as the performance-limiting factors for anion-exchange membrane fuel cells (AEMFCs). Here, we review the main characteristics of the surface adsorptions, their impact on the performance of HOR half-cell and AEMFC, and the mitigation strategies. This review emphasizes important aspects in the design of electrocatalysts and ionomers for improved AEMFC performance.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Program (EE-3F)
- Grant/Contract Number:
- 89233218CNA000001; AC02-05CH11231; AC52-06NA25396
- OSTI ID:
- 1484662
- Report Number(s):
- LA-UR-18-28281
- Journal Information:
- Current Opinion in Electrochemistry, Journal Name: Current Opinion in Electrochemistry Vol. 12; ISSN 2451-9103
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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