Efficient electrochemical water splitting catalyzed by electrodeposited NiFe nanosheets film

Cost-effective bifunctional oxygen- and hydrogen-evolving electrocatalysts made from earth-abundant elements are crucial for efficient water splitting. In this communication, we report a versatile and one-step electrodeposition of NiFe nanosheets film on Ni foam (NiFe/NF) as a bifunctional catalytic material with high activity and stability for overall water splitting in basic electrolytes. The two-electrode electrolyzer using NiFe/NF as both anode and cathode can afford current density of 10 mA cm−2 at a cell voltage of 1.64 V, which stimulates the design and development of transition metal alloy nanostructures as attractive bifunctional catalysts for electrochemical production of hydrogen fuels.