Tuning the apparent hydrogen binding energy to achieve high-performance Ni-based hydrogen oxidation reaction catalyst.

ABSTRACT: High-performance platinum-group-metal-free alkaline hydrogen oxidation reaction catalysts are essential for the hydroxide exchange membrane fuel cells, which generally require high Pt loadings on the anode. Herein, we report a highly active hydrogen oxidation reaction catalyst, NiCuCr, indicated by the hydroxide exchange membrane fuel cell with a high peak power density of 577 mW cm^-2 (18 times as high as the Ni/C anode) and a stability of more than 150 h (a degradation rate slower by 7 times than the Ni/C anode). The spectroscopies demonstrate that the alloy effect from Cu weakens the hydrogen binding, and the surface Cr₂O₃ species enhance the interfacial water binding. Both effects bring an optimized apparent hydrogen binding energy and thus lead to the h

SUBMITTER: Wang X 

PROVIDER: S-EPMC10850486 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature