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The large-scale synthesis of efficient nonprecious bifunctional electrocatalysts for overall water splitting is a great challenge for future renewable energy conversion systems. Herein, Ni_2P nanosheet arrays directly grown on three-dimensional(3 D) Ni foam(Ni P/NF) are fabricated by hydrothermal treatment of metallic Ni foam with H_2O_2 solution and subsequent phosphidation with NaH_2PO_2. The Ni P/NF as electrocatalyst exhibits superior activities for both hydrogen evolution reaction(HER) and oxygen evolution reaction(OER). Most importantly, employing both as the cathode and anode for an alkaline water electrolyzer, Ni P/NF only requires a cell voltage of 1.63 V to reach a current density of 10 mV cm~(-2), together with stronger durability. Preliminary catalytic information suggests that the tailored 3 D superstructure and integrated electrode configurations afford improved active sties and enhanced electron/mass transfer,responding for the outstanding activity and stability.
The large-scale synthesis of efficient nonprecious bifunctional electrocatalysts for overall water splitting is a great challenge for future renewable energy conversion systems. Herein, Ni_2P nanosheet arrays directly grown on three-dimensional (3 D) Ni foam (Ni P / NF) are fabricated by hydrothermal treatment of metallic Ni foam with H 2 O 2 solution and subsequent phosphidation with NaH 2 PO 2. The Ni P / NF as electrocatalyst development superior activities for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Mostly both, employing both as the cathode and anode for an alkaline water electrolyzer, Ni P / NF only requires a cell voltage of 1.63 V to reach a current density of 10 mV cm -2, together with highly durability. Preliminary catalytic information suggests that the tailored 3 D superstructure and integrated electrode configurations afford improved active sties and enhanced electron / mass transfer, responding for the outstanding activity and stability.