The OER performance of Nickel (oxy)hydroxide strongly depends on electrolyte cations. Here, we reveal a clear activity order of KOH > NaOH > LiOH with decreasing activation energies. Larger cations promote *OH adsorption and Ni 2+ oxidation, weakening Ni-O bonds and lowering reaction barriers, improving the OER performance.
Y. Wei, L. Li, M. Fan, J. Xiong, W. Li and C. HAN, Chem. Commun., 2026, Accepted Manuscript , DOI: 10.1039/D6CC01254J
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