期刊
ACS APPLIED NANO MATERIALS
卷 4, 期 11, 页码 11473-11479出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c02893
关键词
Ni3N; Mo4+/6+ species; hydrogen oxidation reaction; alkaline polymer electrolyte fuel cells; enhanced hydroxyl adsorption
资金
- National Natural Science Foundation of China [22075238, 21805232, 21890752, 21731005, 21721001]
- Science and Technology Projects of Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM) [RD2020020101]
- Natural Science Foundation of Jiangxi Province of China [20192ACBL20047]
- China Postdoctoral Science Foundation [2018M632583]
- Tencent Foundation
An improved alkaline polymer electrolyte fuel cell (APEFC) with a Mo-decorated Ni3N anode has been demonstrated in this study, achieving a power density of up to 180 mW/cm(2) at 70 degrees C. The presence of Mo species in both +4 and +6 valences on the surface of nanoscale Ni3N is crucial for hydroxyl adsorption, facilitating the Volmer step and enhancing APEFC performance. This work offers a promising approach for exploring PGM-free APEFC electrocatalysts.
The sluggish hydrogen oxidation reaction of abundant-platinum group metal (PGM)-free catalysts under alkaline conditions has hindered the possibility of alkaline polymer electrolyte fuel cells (APEFCs). Here we show an improved APEFC with a Mo-decorated Ni3N anode, exhibiting a power density up to 180 mW/cm(2) at 70 degrees C. Mo species on the surface of nanoscale Ni3N were found in the form of both +4 and +6 valences, key for the hydroxyl adsorption. Furthermore, the improved APEFC performance contributed to an enhanced hydroxyl adsorption on Mo4+/6+ species to facilitate the Volmer step. This work has demonstrated a promising approach for exploring PGM-free APEFC electrocatalysts.
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