Heterogeneous Cu1.92S@Cu3P/Ni2P nanospheres on nickel foam for effective electrocatalytic oxygen evolution reaction

The design and exploration of highly efficient and economical electrocatalysts for large-scale hydrogen generation from electrochemical water splitting is of great importance towards hydrogen economy. Herein, we have synthesized heterogeneous Cu1.92S@Cu3P/Ni2P nanospheres on nickel foam, which exhibits excellent OER activity in alkaline solution. When used as an anode, the overpotential of Cu1.92S@Cu3P/Ni2P at the current density of 10 mA cm-2 is only 211 mV, with a good stability (24 h). The heterogeneous Cu1.92S@Cu3P/Ni2P nanospheres has synergistic modulation of electronic structure, abundant active sites and fast electron transfer rate, which contributes to its high OER activity.