Electrodeposition Synthesis of Highly Efficient CoMoCu Catalyst for Hydrogen Evolution Reaction

Abstract Co-based derivatives have been proved as high-active electrochemical water splitting catalysts. In this study, a highly efficient CoMoCu catalyst for hydrogen evolution reaction (HER) was prepared by doping trace Mo and Cu into Co through a simple one-step electrodeposition method. The structural and chemical modification toward CoMoCu led by Cu doping was studied, and a series of characterization methods were utilized to reveal its mechanism. Compared with bimetallic CoMo and CoCu, the CoMoCu exhibits outstanding activity for the HER in 0.5 M H 2 SO 4 .