Metal-support interaction boosts the stability of Ni-based electrocatalysts for alkaline hydrogen oxidation.

ABSTRACT: Ni-based hydrogen oxidation reaction (HOR) electrocatalysts are promising anode materials for the anion exchange membrane fuel cells (AEMFCs), but their application is hindered by their inherent instability for practical operations. Here, we report a TiO₂ supported Ni₄Mo (Ni₄Mo/TiO₂) catalyst that can effectively catalyze HOR in alkaline electrolyte with a mass activity of 10.1 ± 0.9 A g^-1_Ni and remain active even up to 1.2 V. The Ni₄Mo/TiO₂ anode AEMFC delivers a peak power density of 520 mW cm^-2 and durability at 400 mA cm^-2 for nearly 100 h. The origin for the enhanced activity and stability is attributed to the down-shifted d band center, caused by the efficient charge transfer

SUBMITTER: Tian X 

PROVIDER: S-EPMC10762024 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature