Heterostructure Mos 2 /Nis Supported on 3d Nano-Porous Ni as High-Efficient Electrocatalysts for Overall Water Splitting

Abstract

A non-precious metal electrocatalyst with high efficiency has a great effect on sustainable hydrogen production during the operation of overall water splitting. Herein, a heterostructure MoS2/NiS/Ni has been grown on 3D nano-porous Ni for the first time via one-pot de-alloying combined hydrothermal synthesis. The as-prepared MoS2/NiS/Ni presents low overpotentials of 108 mV (η10) for HER and 283 mV (η50) for OER. When assembled for overall water splitting, quite a low output potential difference of 1.547 V at 50 m A cm-2 and a prominent durability for 12 h were presented. Such remarkable performance of MoS2/NiS/Ni was attributed to the high catalytic activity of MoS2/NiS and a fast charge transfer between np-Ni. It provides a possibility for the development of non-precious metal electrocatalysts in the field of chemistry energy.

Keywords: electrocatalysts, de-alloying, heterostructure, MoS2/NiS, overall water splitting