Revealing the effects of oxygen defects on the electro-catalytic activity of nickel oxide

Low-cost transition metal oxides (TMO) has received extensive attention as new-generation oxygen evolution reaction (OER) catalysts. In recent years, introducing oxygen defects via various strategies emerged as an efficient way to increase electro-catalytic activity of TMO. Despite many successful examples, the physical and chemical origin of such enhanced OER activity induced by oxygen defects is still not well understood. In this work, we...