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Clarifying the critical roles of iron in boosting oxygen reduction: Single Fe atoms anchored on carbon vacancies as efficient active sites

Tan, Feng1,2; Li, Wei1,2; Wang, Jingsong1; Min, Chungang2; Li, Zhanping3; Zhang, Bingsen4; Zheng, Xusheng5; Li, Lina6; Zhang, Longzhou7; Zhou, Liexing2; Shi, Qingnan1; Yang, Xikun1,2
Corresponding AuthorYang, Xikun(yxk630@hotmail.com)
2022-05-15
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume305Pages:11
AbstractDue to highly heterogeneity of pyrolyzed transition metal-nitrogen-carbon (M-N-C) catalyst, elucidating mechanisms of roles of metal in enhancing oxygen reduction reaction (ORR) is challenging. Here, we design a surface structurally-defined precursor with Fe-N coordination to atomically disperse iron (Fe) on N-doped carbon hollow microspheres surface (NHMs@Fe) by pyrolysis of the precursor. The obtained NHMs@Fe catalyst exhibits a high ORR activity comparable to commercial Pt/C catalyst. The detailed analyses confirmed that (i) Fe atoms are uniformly distributed on N-poor carbon surface, and (ii) the designed Fe-N-x coordination are destroyed and don't convert into Fe-N-x active sites after thermal activation. We find that single Fe atoms produced by carbothermal reduction are directly trapped into adjacent carbon vacancies generated by the removal of N to create active sites for ORR. This work not only reveals the origin of activity of Fe-N-C catalyst but also opens an avenue for preparation of high-performance M-N-C catalysts.
KeywordStructurally-defined precursor Single iron atom Carbon vacancy Catalytic active site Oxygen reduction reaction
Funding OrganizationNational Natural Science Foundation of China
DOI10.1016/j.apcatb.2021.121035
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[21363012] ; National Natural Science Foundation of China[51374117] ; National Natural Science Foundation of China[11764026]
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS IDWOS:000783081100005
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/172828
Collection中国科学院金属研究所
Corresponding AuthorYang, Xikun
Affiliation1.Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China
2.Kunming Univ Sci & Technol, Res Ctr Anal & Measurement, Kunming 650093, Yunnan, Peoples R China
3.Tsinghua Univ, Anal Ctr, Beijing 100080, Peoples R China
4.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
5.Univ Sci & Technol China, Natl Synchrotron Radiat Lab NSRL, Hefei 230029, Peoples R China
6.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
7.Yunnan Univ, Fac Mat Sci & Engn, Kunming 650091, Yunnan, Peoples R China
Recommended Citation
GB/T 7714
Tan, Feng,Li, Wei,Wang, Jingsong,et al.

Clarifying the critical roles of iron in boosting oxygen reduction: Single Fe atoms anchored on carbon vacancies as efficient active sites

[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2022,305:11.
APA Tan, Feng.,Li, Wei.,Wang, Jingsong.,Min, Chungang.,Li, Zhanping.,...&Yang, Xikun.(2022).

Clarifying the critical roles of iron in boosting oxygen reduction: Single Fe atoms anchored on carbon vacancies as efficient active sites

.APPLIED CATALYSIS B-ENVIRONMENTAL,305,11.
MLA Tan, Feng,et al."

Clarifying the critical roles of iron in boosting oxygen reduction: Single Fe atoms anchored on carbon vacancies as efficient active sites

".APPLIED CATALYSIS B-ENVIRONMENTAL 305(2022):11.
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