Ce‐Induced Differentiated Regulation of Co Sites via Gradient Orbital Coupling for Bifunctional Water‐Splitting Reactions

Abstract Rare‐earth (RE) elements have emerged as crucial promoters to regulate the electrocatalysis of transition metals (TM), but knowledge about the RE‐enhanced mechanism of TM in electrocatalysis is limited. Herein, an array‐like Ce‐CoP catalyst is constructed to explore the origin and distinction of the Ce‐induced enhanced mechanism of Co sites in both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Compared with individual CoP, the developed Ce‐CoP exhibits superior bifunctional electrocatalytic activity with the overpotentials of 81 and 240 mV at 10 mA cm −2 , respectively for HER and OER, with excellent electrocatalytic stability. Theoretical calculations show that the…

• NN
  National Natural Science Foundation of China

  Awards: 22109073, 22072067
• NS
  Natural Science Foundation of Jiangsu Province

  Award: BK20221321