IHEP OpenIR  > 北京同步辐射装置
Unique Coordination Structure of Cobalt Single-Atom Catalyst Supported on Dopant-Free Carbon
BSRF用户
2021
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
EISSN1932-7455
Volume125Issue:12Pages:6735--6742
SubtypeArticle
AbstractMetal single-atom catalysts (SACs) supported on doped-carbon materials have attracted extensive attention for the electrocatalytic oxygen reduction reaction (ORR); however, dopant-free carbon supported metal SACs are rather scarcely studied because they are expected to aggregate under harsh catalytic conditions. In this work, we report the successful synthesis of porous carbon-anchored cobalt SACs. The atomic dispersion of the as-synthesized catalyst is confirmed by high-angle annular dark-field scanning transmission electron microscopy and X-ray absorption fine structure spectra. This atomically dispersed catalyst is identified to be in a Co-C-4 structure with weakly adsorbed O-2 molecules under ambient conditions. It exhibits remarkable reaction activity and superb stability toward the ORR reaction, with the Co-C-4 units being the active sites. Theoretical calculations unravel that the stability of the Co-C-4 unit is reinforced by the d-p hybridization between Co and coordinated C atoms that allows for substantial charge transfer from Co to C. This work may offer new insights into rational design and synthesis of carbon-based metal SACs for electrochemical applications.
DOI10.1021/acs.jpcc.1c01910
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000636924700023
ItemNoBSRF00825
beamline1W1B
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/293593
Collection北京同步辐射装置
Recommended Citation
GB/T 7714
BSRF用户. Unique Coordination Structure of Cobalt Single-Atom Catalyst Supported on Dopant-Free Carbon[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2021,125(12):6735--6742.
APA BSRF用户.(2021).Unique Coordination Structure of Cobalt Single-Atom Catalyst Supported on Dopant-Free Carbon.JOURNAL OF PHYSICAL CHEMISTRY C,125(12),6735--6742.
MLA BSRF用户."Unique Coordination Structure of Cobalt Single-Atom Catalyst Supported on Dopant-Free Carbon".JOURNAL OF PHYSICAL CHEMISTRY C 125.12(2021):6735--6742.
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