Issue 3, 2022

Seamless separation of OHad and Had on a Ni–O catalyst toward exceptional alkaline hydrogen evolution

Abstract

Seamless separation of intermediates (OHad and Had) to different active sites at the atomic scale is realized on a Ni–O catalyst that is functionalized with low-coordinated oxygen and abundant vacancies. During alkaline hydrogen evolution reaction (HER), the former enables active states for Had adsorption/desorption; meanwhile, nearby Niδ+ vacancies allow an optimal interaction with OHad. Consequently, such a synergistic action significantly expedites water dissociation and HER kinetics on the Ni–O catalyst with exceptional activity approaching that of the benchmark platinum electrocatalyst. This work presents a significant advance and offers new insights in designing non-precious metal oxides toward alkaline HER.

Graphical abstract: Seamless separation of OHad and Had on a Ni–O catalyst toward exceptional alkaline hydrogen evolution

Supplementary files

Article information

Article type
Communication
Submitted
25 Aug 2021
Accepted
16 Dec 2021
First published
16 Dec 2021

J. Mater. Chem. A, 2022,10, 1278-1283

Seamless separation of OHad and Had on a Ni–O catalyst toward exceptional alkaline hydrogen evolution

J. Li, D. Chu, D. R. Baker and R. Jiang, J. Mater. Chem. A, 2022, 10, 1278 DOI: 10.1039/D1TA07303F

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