CAS OpenIR
ORR and OER of Co-N codoped carbon-based electrocatalysts enhanced by boundary layer oxygen molecules transfer
Zhang, Jintao1,2; Zhang, Tong2,3; Ma, Jing1; Wang, Zhi2; Liu, Junhao2; Gong, Xuzhong2,3
2021-02-01
Source PublicationCARBON
ISSN0008-6223
Volume172Pages:556-568
AbstractTwo-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.
KeywordCarbon-based electrocatalysts Coal tar pitch Mass transfer ORR and OER Point discharge effect
DOI10.1016/j.carbon.2020.10.075
Language英语
WOS KeywordMETAL-FREE ELECTROCATALYSTS ; ORDERED MESOPOROUS CARBONS ; REDUCTION REACTION ; ACTIVE-SITES ; KOH ACTIVATION ; TAR PITCH ; HYDROGEN EVOLUTION ; POROUS CARBONS ; ORGANIC FRAMEWORKS ; WATER OXIDATION
Funding ProjectNatural Science Foundation of China[21878299] ; National Key R&D Program of China[2018YFE0183600]
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
Funding OrganizationNatural Science Foundation of China ; National Key R&D Program of China
WOS IDWOS:000600356800004
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/42874
Collection中国科学院过程工程研究所
Corresponding AuthorMa, Jing; Wang, Zhi; Gong, Xuzhong
Affiliation1.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
Recommended Citation
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.
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