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Title: Co,N-codoped graphene as efficient electrocatalyst for hydrogen evolution reaction: Insight into the active centre

Abstract

Co and N co-doped carbon (CNC) material is one of the most promising precious-metal-free catalyst forhydrogen evolution reaction (HER), however, widespread application of CNC will require continuousinnovation and optimization of fabrication to maximize electrocatalytic performance, which is always achallenge. Herein, two types of three-dimensional (3D) graphene materials synthesized by one-step ofsimultaneous doping (Co,N/3DG-1) and two-step of sequential doping (Co,N/3DG-2) respectively, areevaluated and correlated their electrocatalytic activity for HER with experimental parameters. The resultsindicate that Co,N/3DG-2 exhibits significantly better electrocatalytic activity than Co,N/3DG-1. Thestructure analysis reveals that Co,N/3DG-2 has more moderate Co-N coordinated number than Co,N/3DG-1. Density functional theor y calculations unravels that the equilibrium C and N around Co atomis more favorable to the adsorption and desorption of hydrogen. The results shed new light on therational design of dual hetero-atom co-doped carbon materials, which may be applicable to other energyconversion and storage systems.

Authors:
 [1];  [2]; ORCiD logo [1];  [2];  [1];  [1];  [1];  [2]
  1. Changzhou University, Changzhou (China). Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering
  2. Georgia Institute of Technology, Atlanta, GA (United States). School of Materials Science and Engineering
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory, Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC).
Sponsoring Org.:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
OSTI Identifier:
1463692
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 363; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Wang, Shumin, Zhang, Lei, Qin, Yong, Ding, Dong, Bu, Yunfei, Chu, Fuqiang, Kong, Yong, and Liu, Meilin. Co,N-codoped graphene as efficient electrocatalyst for hydrogen evolution reaction: Insight into the active centre. United States: N. p., 2017. Web. doi:10.1016/j.jpowsour.2017.07.107.
Wang, Shumin, Zhang, Lei, Qin, Yong, Ding, Dong, Bu, Yunfei, Chu, Fuqiang, Kong, Yong, & Liu, Meilin. Co,N-codoped graphene as efficient electrocatalyst for hydrogen evolution reaction: Insight into the active centre. United States. doi:10.1016/j.jpowsour.2017.07.107.
Wang, Shumin, Zhang, Lei, Qin, Yong, Ding, Dong, Bu, Yunfei, Chu, Fuqiang, Kong, Yong, and Liu, Meilin. Fri . "Co,N-codoped graphene as efficient electrocatalyst for hydrogen evolution reaction: Insight into the active centre". United States. doi:10.1016/j.jpowsour.2017.07.107.
@article{osti_1463692,
title = {Co,N-codoped graphene as efficient electrocatalyst for hydrogen evolution reaction: Insight into the active centre},
author = {Wang, Shumin and Zhang, Lei and Qin, Yong and Ding, Dong and Bu, Yunfei and Chu, Fuqiang and Kong, Yong and Liu, Meilin},
abstractNote = {Co and N co-doped carbon (CNC) material is one of the most promising precious-metal-free catalyst forhydrogen evolution reaction (HER), however, widespread application of CNC will require continuousinnovation and optimization of fabrication to maximize electrocatalytic performance, which is always achallenge. Herein, two types of three-dimensional (3D) graphene materials synthesized by one-step ofsimultaneous doping (Co,N/3DG-1) and two-step of sequential doping (Co,N/3DG-2) respectively, areevaluated and correlated their electrocatalytic activity for HER with experimental parameters. The resultsindicate that Co,N/3DG-2 exhibits significantly better electrocatalytic activity than Co,N/3DG-1. Thestructure analysis reveals that Co,N/3DG-2 has more moderate Co-N coordinated number than Co,N/3DG-1. Density functional theor y calculations unravels that the equilibrium C and N around Co atomis more favorable to the adsorption and desorption of hydrogen. The results shed new light on therational design of dual hetero-atom co-doped carbon materials, which may be applicable to other energyconversion and storage systems.},
doi = {10.1016/j.jpowsour.2017.07.107},
journal = {Journal of Power Sources},
issn = {0378-7753},
number = C,
volume = 363,
place = {United States},
year = {2017},
month = {9}
}