Co0.4Fe1.6P electrocatalysts through Mo ion doping strategies for stable alkaline water splitting

Abstract

The exploration of highly active and durable transition metal phosphide (TMP) electrocatalysts is important for the development of green and sustainable energy technology. However, the poor stability and expensive prices of the catalysts restrict their applications in electrolysis of water. Doping metal atoms can improve the total performance of TMPs. Herein, we prepare several Mo doped Co_0.4Fe_1.6P materials through a one-step hydrothermal route. The Mo-Co_0.4Fe_1.6P-5% sample exhibits 73 mV@10 mA cm⁻² and 260 mV@50 mA cm⁻² for the HER and OER, respectively. Moreover, it delivers 1.787 V at 100 mA cm⁻² for electrolysis of water. The catalysts also present a cycle life of 300 h. A facile approach to engineer high-performance non-precious metal electrocatalysts toward efficient water splitting is demonstrated.