Dual-modulation of phase and electronic structure in hierarchical Ni3Fe/Ni3FeN catalyst by Mo-doping to achieve efficient oxygen evolution reaction

Among the groups of excellent electrode materials reported, Ni-Fe based catalyst is a topic of significant current interest for electrochemical water splitting. Furthermore, hierarchical structures are widely used in heterogeneous catalysis in various catalytic processes. A novel hybrid of Mo-doped Ni 3 Fe/Ni 3 FeN nanocatalyst was designed by using a facile method in this study. The Mo-Ni 3 Fe/Ni 3 FeN catalyst exhibits an outstanding catalytic performance for oxygen evolution reaction, as indicated by an ultralow overpotential of 240 mV at 10 mA·cm −2 and a small Tafel slope of 47 mV·dec −1 . This study provides an idea for the development of new eletrocatalysts with more electron transfer channels and higher electrocatalytic performance.