A general approach to synthesise ultrathin NiM (M = Fe, Co, Mn) hydroxide nanosheets as high-performance low-cost electrocatalysts for overall water splitting
Xiuhui Sun a, Qi Shao a, Yecan Pi a , Jun Guob and Xiaoqing Huang*a（黄小青）
a College of Chemistry, Chemical Engineering and Materials Science, Soochow University, China
b Testing & Analysis Center, Soochow University, Suzhou 215123, China
Journal of Materials Chemistry A, 2017, 5, 7769–7775
Electrochemically splitting water into hydrogen (H2) and oxygen (O2) is a promising method for clean energy generation, while the absence of highly active, stable, low-cost and earth abundant catalysts greatly impedes its large-scale application. Herein, we report a general and robust approach for the controlled synthesis of a class of NiM (M = Fe, Co, Mn) hydroxide nanosheets (HNSs) that have ultrathin thicknesses of around 2 nm. Such unique structures enable the HNSs to have promising oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performances, with the NiFe HNSs being the best candidate. Given the well-defined electrochemical bifunctionality, a full alkaline electrolyzer was constructed using NiFe HNSs as both the cathodic and the anodic catalysts. It can realize overall water splitting with a current density of 10 mA cm−2 at 1.67 V and has remarkable durability for 12 h. This work opens a new avenue to approach water splitting catalysis using efficient low-cost Ni-based HNSs.
链接：http://pubs.rsc.org/en/content/articlelanding/2017/ta/c7ta02091k#!divAbstract