气候变化领域集成服务门户(CCPortal): Operando X-ray spectroscopy visualizing the chameleon-like structural reconstruction on an oxygen evolution electrocatalyst

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DOI	10.1039/d0ee02276d
	Operando X-ray spectroscopy visualizing the chameleon-like structural reconstruction on an oxygen evolution electrocatalyst
	Cao D.; Liu D.; Chen S.; Moses O.A.; Chen X.; Xu W.; Wu C.; Zheng L.; Chu S.; Jiang H.; Wang C.; Ge B.; Wu X.; Zhang J.; Song L.
发表日期	2021
ISSN	17545692
起始页码	906
结束页码	915
卷号	14 期号:2
英文摘要	The ambiguous mechanism of electrocatalysts for the oxygen evolution reaction (OER) greatly hinders their industrial applications toward renewable and clean energy conversion. Here, we elaborately prepared a cobalt sulfide catalyst to perform a comprehensive study of the OER performance under neutral/alkaline conditions. The combination of synchrotron-based operando X-ray spectroscopic investigations and electron microscopy observations captured a chameleon-like structural self-optimization on the cobalt sulfide oxygen evolution electrocatalyst in both neutral and alkaline electrolytes. Driven by the actual working conditions (pH gradient, electrical potential, etc.), distinct catalytic sites could be activated dramatically. In particular, the CoOOH supported on a single-walled carbon nanotube (CoOOH-SWCNT) with residual S species was identified as the true catalyst under alkaline conditions rather than the entirely transformed CoOOH-SWCNT, while the oxygenated CoS-SWCNT (O-CoS-SWCNT) was formed as the true catalyst under neutral conditions. Undoubtedly, such a mechanism of opening different locks with different keys and its microstructural advantages together guarantee the high catalytic activity in different electrolytes. This work provides a promising catalyst as well as sheds light on the very essence of the structural self-optimization process of catalysts. It makes a significant contribution to the advancement of OER relevant studies in the future while providing new ideas for the fields of chemistry and catalysis. © The Royal Society of Chemistry.
英文关键词	Alkalinity; Catalyst activity; Cobalt metallography; Electrocatalysts; Electrolytes; Energy conversion; Oxygen; Oxygen evolution reaction; Single-walled carbon nanotubes (SWCN); Structural optimization; Sulfur compounds; X ray spectroscopy; Alkaline conditions; Alkaline electrolytes; Electrical potential; Neutral conditions; Oxygen evolution reaction (oer); Spectroscopic investigations; Structural reconstruction; Sulfide catalysts; Cobalt compounds; alkalinity; carbon nanotube; catalysis; catalyst; chemical reaction; electrolyte; oxygen; X-ray spectroscopy
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190789
作者单位	National Synchrotron Radiation Laboratory, Hefei National Laboratory for Physical Sciences at the Microscales, Synergetic Innovation of Quantum Information and Quantum Technology, Cas Key Laboratory of Materials for Energy Conversion, Cas Center for Excellence in Nanoscience, Department of Materials Sciences and Engineering, University of Science and Technology of China, Hefei Anhui, 230026, China; School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; Institute of Physical Science and Information Technology, Anhui University, Hefei, 230601, China; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing, 100190, China
推荐引用方式 GB/T 7714	Cao D.,Liu D.,Chen S.,et al. Operando X-ray spectroscopy visualizing the chameleon-like structural reconstruction on an oxygen evolution electrocatalyst[J],2021,14(2).
APA	Cao D..,Liu D..,Chen S..,Moses O.A..,Chen X..,...&Song L..(2021).Operando X-ray spectroscopy visualizing the chameleon-like structural reconstruction on an oxygen evolution electrocatalyst.Energy & Environmental Science,14(2).
MLA	Cao D.,et al."Operando X-ray spectroscopy visualizing the chameleon-like structural reconstruction on an oxygen evolution electrocatalyst".Energy & Environmental Science 14.2(2021).