Preparations and Electrochemical Properties of Co@NC Nanocomposites Based on ZIF-67

Authors

Xiao-li TAN, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027;
Deng-hong HE, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027;
Xing-wang ZHANG, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027;Quzhou Research Institute, Zhejiang University, Quzhou, Zhejiang, 324000;Follow

Corresponding Author

Xing-wang ZHANG(xwzhang@zju.edu.cn)

Abstract

It is necessary to develop an inexpensive catalyst for the replacement of precious metal catalysts (such as RuO₂, IrO₂). In this article, the metal organic framework ZIF-67 was synthesized by solvothermal method at room temperature, and then the high temperature carbonization was used to prepare the nitrogen-doped carbon-based composite material Co@NC with the Co nanoparticle inside. The effects of the carbonization temperature on surface morphology, chemcial composition and electrocatalytic property were investigated. Most importantly, the Co@NC catalyst with the best morphology and structure was synthesized, and its catalytic activity and stability toward oxygen evolution reaction (OER) were studied under alkaline conditions. Electrochemical test results showed that the Co@NC catalyst prepared at 700 ℃ had higher OER catalytic activity and excellent stability. It only required an overpotential of 266 mV for reaching the current density of 10 mA·cm^-2, with good stability over 40 h.

Graphical Abstract

Keywords

ZIF-67, Co@NC, nanocomposites, electrocatalytic properties

DOI Link

https://doi.org/10.13208/j.electrochem.181146

Publication Date

2019-10-28

Online Available Date

2019-10-28

Revised Date

2019-08-10

Received Date

2019-05-06

Recommended Citation

Xiao-li TAN, Deng-hong HE, Xing-wang ZHANG. Preparations and Electrochemical Properties of Co@NC Nanocomposites Based on ZIF-67[J]. Journal of Electrochemistry, 2019 , 25(5): 601-607.
DOI: 10.13208/j.electrochem.181146
Available at: https://jelectrochem.xmu.edu.cn/journal/vol25/iss5/8