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It is of significant importance to develop effective non-noble-metal catalysts for hydrogen evolution electrocatalysis under basic conditions. In this study, we demonstrate the facile construction of a Ni 2 P–CeO 2 interface based on the central point that low-temperature phosphidation of the NiO–CeO 2 precursor only converts NiO into Ni 2 P selectively. The resulting Ni 2 P–CeO 2 nanosheet array on Ti mesh behaves as a durable catalyst for alkaline hydrogen evolution reaction (HER) electrocatalysis, and it can reach 20 mA cm –2 at an overpotential of 84 mV in 1.0 M KOH, outperforming all reported Ni phosphide HER catalysts. Density functional theory calculations reveal that the Ni 2 P–CeO 2 interface can promote water dissociation and optimize hydrogen adsorption free energy.
Zhang et al. (Tue,) studied this question.