Hierarchically Porous Ni3S2 Nanorod Array Foam as Highly Efficient Electrocatalyst for Hydrogen Evolution Reaction and Oxygen Evolution Reaction

• DOI: 10.1016/j.electacta.2015.05.186
• Publication Date: 2015-06-04T02:39:39Z
• Authors: Canbin Ouyang; Xin Wang; Chen Wang; Xiaoxu Zhang; Jianghong Wu; Zhaoling Ma; Shuo Dou; Shuangyin Wang
• Keywords: Oxygen evolution; Nanorod

Abstract It is highly challenging but imperative to develop highly efficient, low-cost and environmentally friendly bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Herein, we successfully prepared hierarchically porous Ni 3 S 2 nanorod array foam through a simple hydrothermal process assisted by the pretreatment with HCl. The resulting hierarchically porous Ni 3 S 2 nanostructures exhibits excellent catalytic activity and stability towards both HER and OER with low overpotential of 200 mV and 217 mV at current density of 10 mA cm −2 for HER and OER, respectively, which are among the best non-noble metal HER/OER electrocatalysts reported in literatures. The as-prepared bifunctional electrocatalyst for both HER and OER could act as the promising electrode materials for water splitting.