Heterogeneous Cu _1.92S@Cu ₃p/Ni ₂P Nanospheres on Nickel Foam for Efficient Electrocatalytic Oxygen Evolution Reaction

Abstract

The design of highly efficient and inexpensive electrocatalysts for water splitting to produce hydrogen is of great importance for hydrogen economy. Herein, we have synthesized heterogeneous Cu_1.92S@Cu₃p/Ni₂P nanospheres on nickel foam, which exhibits excellent OER activity in alkaline solution. When the current density is 10 mA cm-2, the overpotential of Cu_1.92S@Cu₃p/Ni₂P is only 211 mV. The heterogeneous Cu_1.92S@Cu₃p/Ni₂P nanospheres has synergistic modulation of electronic structure, abundant active sites and fast electron transfer rate, which contributes to its high OER activity.

Keywords: heterogeneous, nanospheres, OER, overpotential, alkaline solution