Title: Impact of ionomer adsorption on alkaline hydrogen oxidation activity and fuel cell performance

Journal Article · · Current Opinion in Electrochemistry

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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