Hollow Cobalt-Based Bimetallic Sulfide Polyhedra for Efficient All-pH-Value Electrochemical and Photocatalytic Hydrogen Evolution

Journal of the American Chemical Society
Zhen-Feng HuangJi-Jun Zou

Abstract

The development of highly active, universal, and stable inexpensive electrocatalysts/cocatalysts for hydrogen evolution reaction (HER) by morphology and structure modulations remains a great challenge. Herein, a simple self-template strategy was developed to synthesize hollow Co-based bimetallic sulfide (MxCo3-xS4, M = Zn, Ni, and Cu) polyhedra with superior HER activity and stability. Homogenous bimetallic metal-organic frameworks are transformed to hollow bimetallic sulfides by solvothermal sulfidation and thermal annealing. Electrochemical measurements and density functional theory computations show that the combination of hollow structure and homoincorporation of a second metal significantly enhances the HER activity of Co3S4. Specifically, the homogeneous doping in Co3S4 lattice optimizes the Gibbs free energy for H* adsorption and improves the electrical conductivity. Impressively, hollow Zn0.30Co2.70S4 exhibits electrocatalytic HER activity better than most of the reported nobel-metal-free electrocatalysts over a wide pH range, with overpotentials of 80, 90, and 85 mV at 10 mA cm(-2) and 129, 144, and 136 mV at 100 mA cm(-2) in 0.5 M H2SO4, 0.1 M phosphate buffer, and 1 M KOH, respectively. It also exhibits photocatalyti...Continue Reading

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Citations

Sep 23, 2016·ACS Applied Materials & Interfaces·Bing MaShuang-Quan Zang
Oct 5, 2016·ACS Applied Materials & Interfaces·Jing YuVinayak P Dravid
Oct 25, 2016·Journal of the American Chemical Society·Jie YinShouheng Sun
Nov 12, 2016·Journal of Colloid and Interface Science·Jingjing Zheng, Zhengbo Jiao
Mar 21, 2017·Journal of the American Chemical Society·Ekaterina A DolgopolovaNatalia B Shustova
May 26, 2017·Journal of the American Chemical Society·Jiashen MengLiqiang Mai
Jul 14, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·You-Zhu YuGuo-Dong Feng
Apr 25, 2018·Chemistry : a European Journal·Qi ShaoXiaoqing Huang
Oct 16, 2018·Chemistry : a European Journal·Zuozhong LiangRui Cao
Mar 13, 2019·Angewandte Chemie·Xiaoyan LiJohn B Goodenough
Apr 11, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Yilei LiXiaohong Li
May 2, 2019·Chemical Communications : Chem Comm·Mathias SmialkowskiUlf-Peter Apfel
Aug 21, 2019·Chemistry, an Asian Journal·Juan LiuRoland A Fischer

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