ORR and OER of Co-N codoped carbon-based electrocatalysts enhanced by boundary layer oxygen molecules transfer

doi:10.1016/j.carbon.2020.10.075

	ORR and OER of Co-N codoped carbon-based electrocatalysts enhanced by boundary layer oxygen molecules transfer
	Zhang, Jintao 1,2; Zhang, Tong 2,3; Ma, Jing 1; Wang, Zhi 2; Liu, Junhao 2; Gong, Xuzhong 2,3
刊名	CARBON
	2021-02-01
卷号	172 页码:556-568
关键词	Carbon-based electrocatalysts Coal tar pitch Mass transfer ORR and OER Point discharge effect
ISSN号	0008-6223
DOI	10.1016/j.carbon.2020.10.075
英文摘要	Two-step carbonization method was reported to synthesize Co-N doped coal tar pitch (CTP) carbon-based electrocatalysts with hierarchical pore structure, high local order degree and efficient Co-N-x active structure simultaneously. The synergistic effect of the carbon substrate with highly ordered structure and the Co-N-x active sites realized the "Point discharge effect". The pi-pi interactions from the CTP aromatic ring sheets and Co-N-x promoted the adsorption and dissociation of oxygen molecules, respectively. The increased diffusion coefficient (D-0) indicated the mass transfer of oxygen molecules in the boundary layer was enhanced during the ORR process. Thanks to excellent structural characteristics, ACTP(5)@Co,N-800 exhibited better ORR performance than commercial Pt/C catalyst under alkaline conditions, and the OER activity was improved simultaneously. This work demonstrated a simple and practical strategy for the development of advanced carbon-based electrocatalysts, and also provided novel insights from kinetics perspectives for improving electrocatalytic efficiency. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	Natural Science Foundation of China[21878299] ; National Key R&D Program of China[2018YFE0183600]
WOS关键词	METAL-FREE ELECTROCATALYSTS ; ORDERED MESOPOROUS CARBONS ; REDUCTION REACTION ; ACTIVE-SITES ; KOH ACTIVATION ; TAR PITCH ; HYDROGEN EVOLUTION ; POROUS CARBONS ; ORGANIC FRAMEWORKS ; WATER OXIDATION
WOS研究方向	Chemistry ; Materials Science
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000600356800004
资助机构	Natural Science Foundation of China ; National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/42873]
专题	中国科学院过程工程研究所
通讯作者	Ma, Jing; Wang, Zhi; Gong, Xuzhong
作者单位	1.Taiyuan Univ Technol, Inst New Carbon Mat, Taiyuan 030024, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jintao,Zhang, Tong,Ma, Jing,et al. ORR and OER of Co-N codoped carbon-based electrocatalysts enhanced by boundary layer oxygen molecules transfer[J]. CARBON,2021,172:556-568.
APA	Zhang, Jintao,Zhang, Tong,Ma, Jing,Wang, Zhi,Liu, Junhao,&Gong, Xuzhong.(2021).ORR and OER of Co-N codoped carbon-based electrocatalysts enhanced by boundary layer oxygen molecules transfer.CARBON,172,556-568.
MLA	Zhang, Jintao,et al."ORR and OER of Co-N codoped carbon-based electrocatalysts enhanced by boundary layer oxygen molecules transfer".CARBON 172(2021):556-568.