Bimetallic Boron Phosphide Ni‐2Fe‐BP as an Active Water‐Splitting Catalyst

Abstract The increasing development of hydrogen energy requires us to continuously update the technology of hydrogen production and promote the more rapid development of hydrogen energy. Among them, the electrolysis of water to produce hydrogen is the current research hotspot. In this paper, a simple synthesis method is used to prepare amorphous nano‐scale monometallic Ni and bimetallic Ni, Fe boron phosphides, which are used as electrocatalysts to catalyze water splitting. We explored the best ratio of B to P in monometallic boron phosphides, and the optimal ratio of Ni and Fe in the bimetallic boron phosphide. It shows that when the ratio of B to P is 1 : 5 and the iron content is 0.2 in the Ni‐Fe‐BP, the catalytic performance of the material is optimal. It shows outstanding performance of 310 mV overpotential at a current density of 20 mA cm −2 , and its hydrogen evolution reaction overpotential is only 258 mV, which is better than noble metal materials. At the same time, it maintains excellent stability for 12 h at a constant potential. This work provides a better choice for subsequent research on non‐precious metal catalyst materials.