Low-coordinated surface nickel oxide as electrocatalyst for efficient water oxidation

• DOI: 10.1016/j.jcat.2023.115278
• Publication Date: 2023-12-24T22:24:27Z
• Authors: Jiayun Zhang; Bing-Jian Su; Kuang-Hsu Wu; Qingbing Xia; Ruth Knibbe; Ian Gentle
• Keywords: Oxygen evolution

Ni-based compounds represent promising candidates as high-performance electrocatalysts for the oxygen evolution reaction (OER) in alkaline media. Here, a new Ni oxide electrocatalyst developed via simple electrodeposition method is reported, exhibiting enhanced catalytic activity OER. Structural and analysis of fresh post-reaction samples reveals that Ni2+ center has low coordination with pyramidal symmetry (NiO5). The bulk metallic readily undergoes oxidation under OER conditions to generate more low-coordinated high-valence state (Ni3+) species, thereby facilitating reaction. This study provides insight into active structure offers pathway design development cost-effective applications