Operando X-ray spectroscopic tracking of self-reconstruction for anchored nanoparticles as high-performance electrocatalysts towards oxygen evolution

doi:10.1039/c8ee00773j

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Operando X-ray spectroscopic tracking of self-reconstruction for anchored nanoparticles as high-performance electrocatalysts towards oxygen evolution
	Song, SZ ; Zhou, J ; Su, XZ ; Wang, Y ; Li, J ; Zhang, LJ ; Xiao, GP ; Guan, CZ ; Liu, RD ; Chen, SG
刊名	ENERGY & ENVIRONMENTAL SCIENCE
	2018
卷号	11 期号:10 页码:2945-2953
关键词	WATER OXIDATION CATALYSTS ABSORPTION SPECTROSCOPY PEROVSKITE SURFACE TRANSITION OXIDES FE CHALLENGES NANOSHEETS STABILITY
ISSN号	1754-5692
DOI	10.1039/c8ee00773j
文献子类	期刊论文
英文摘要	Exploring high-performance electrocatalysts for the oxygen evolution reaction (OER) is pivotal for renewable energy storage and conversion. The surface self-reconstruction during the OER is considered as the key of highly active catalysts, whereas identifying the local electronic and geometric structure of the reconstruction-derived components is challenging. Herein, an in situ exsolution method towards the typical LaCo0.8Fe0.2O3- perovskite is developed to obtain a new type of lanthana-anchored CoFe catalyst. The optimized catalyst exhibits a low overpotential of 293 mV to reach the current density of 10 mA cm(-2) in 0.1 M KOH. Most importantly, operando X-ray absorption spectroscopy (XAS) measurements demonstrate that the CoFe species in the catalyst are nearly transformed into unique (Co/Fe)O(OH) with a definite coordination-unsaturated structure under electrochemical conditions, which actually contributes to this superior performance. Moreover, the presence of the lanthana support promotes this transformation. Our work not only suggests a facile reconstructive strategy to dramatically enhance the OER activity of perovskite oxides in alkaline media, but also unravels the fine structure of true active sites through operando X-ray spectroscopic tracking.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31051]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Song, SZ,Zhou, J,Su, XZ,et al. Operando X-ray spectroscopic tracking of self-reconstruction for anchored nanoparticles as high-performance electrocatalysts towards oxygen evolution[J]. ENERGY & ENVIRONMENTAL SCIENCE,2018,11(10):2945-2953.
APA	Song, SZ.,Zhou, J.,Su, XZ.,Wang, Y.,Li, J.,...&Wang, JQ.(2018).Operando X-ray spectroscopic tracking of self-reconstruction for anchored nanoparticles as high-performance electrocatalysts towards oxygen evolution.ENERGY & ENVIRONMENTAL SCIENCE,11(10),2945-2953.
MLA	Song, SZ,et al."Operando X-ray spectroscopic tracking of self-reconstruction for anchored nanoparticles as high-performance electrocatalysts towards oxygen evolution".ENERGY & ENVIRONMENTAL SCIENCE 11.10(2018):2945-2953.