Heterostructured Mo‐Doped CoP on MXene Supports Enhanced the Alkaline Hydrogen Evolution Activity

Abstract

The development of safe, efficient, and non-noble-metal electrocatalysts is a promising approach for hydrogen energy production. However, due to low electrical conductivity and weak stability, non-noble metal catalysts for HER are significantly limited in practice. Here, a method for low-cost catalysts was reported for synthesizing Mo-CoP/Ti 3 C 2 T x composites in which Mo-doped CoP materials were facilely grown on the surface of Ti 3 C 2 T x MXene. The introduction of MXene and the doping of Mo promoted electron transfer and increased the active sites compared with CoP. As HER electrocatalysts, the Mo-CoP/Ti 3 C 2 T x materials exhibited a good HER activity with a low overpotential of only 117 mV. What's more, these catalysts had shown excellent electron conductivity, fast catalytic dynamics, and a boosted electrochemical active surface. Suitable synthetic ratios were obtained by optimizing the MXene substrate and the Mo doping amount. This work provided a new guide for the design and exploration of MXene based electrocatalysts.