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Authors

Zheng-ling DI, College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, PR China;Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment, Tangshan 063009, PR China;
Jing ZHU, College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, PR China;Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment, Tangshan 063009, PR China;
Lei DAI, College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, PR China;Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment, Tangshan 063009, PR China;Follow
Wei MENG, College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, PR China;Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment, Tangshan 063009, PR China;
Yue-hua LI, College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, PR China;Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment, Tangshan 063009, PR China;
Zhang-xing HE, College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, PR China;Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment, Tangshan 063009, PR China;
Ling WANG, College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, PR China;Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment, Tangshan 063009, PR China;

Corresponding Author

Lei DAI(dailei_b@163.com)

Abstract

Nitrogen-doped porous carbon materials are considered as one of the most promising catalysts for oxygen reduction reaction (ORR). Herein, in order to further improve the activity of the nitrogen-doped porous carbon, Ag/Co bimetal is embedded into nitrogendoped porous carbon to form Ag/Co-embedded nitrogen-doped porous carbon material (AgCo@NC). The AgCo@NC was derived by the wet impregnation of Ag+ into ZIF-67 precursor, followed by chemical reduction and a subsequent pyrolysis process under Ar atmosphere at different temperatures (500 ℃, 600 ℃, 700 ℃). The morphologic characterization shows that the Ag/Co nanoparticles were successfully embedded in the mesoporous carbon framework with abundant nitrogen atoms. The electrochemical test results indicate that the AgCo@NC-600 catalyst exhibited the higher onset potential and half-wave potential than thods of others and Pt/C in alkaline media. Furthermore, the AgCo@NC and Co@NC also displayed the higher methanol-tolerance performance than commercial Pt/C.

Graphical Abstract

Keywords

oxygen reduction reaction, ZIF-67, N-doped porous carbon, Ag nanoparticles

Publication Date

2019-12-28

Online Available Date

2018-10-25

Revised Date

2018-08-28

Received Date

2018-07-27

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