DOI: 10.1016/j.scib.2020.09.037
论文题名: Anomalous self-optimization of sulfate ions for boosted oxygen evolution reaction
作者: Cao D. ; Moses O.A. ; Sheng B. ; Chen S. ; Pan H. ; Wu L. ; Shou H. ; Xu W. ; Li D. ; Zheng L. ; Chu S. ; Hu C. ; Liu D. ; Wei S. ; Zheng X. ; Qi Z. ; Wu X. ; Zhang J. ; Song L.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期: 6 起始页码: 553
结束页码: 561
语种: 英语
中文关键词: Anionic self-optimization (ASO)
; Differential X-ray absorption fine structure (Δ-XAFS) spectrum
; Operando synchrotron radiation Fourier transform infrared (SR-FTIR) spectroscopy
; Oxygen evolution reaction (OER)
; Synchrotron radiation photoelectron spectroscopy (SRPES) depth detection
英文关键词: Absorption spectroscopy
; Catalysts
; Energy conversion
; Fourier transform infrared spectroscopy
; Ions
; Nickel compounds
; Nickel metallography
; Oxygen
; Photoelectron spectroscopy
; Sulfur compounds
; Synchrotron radiation
; Synchrotrons
; X ray absorption
; Electrocatalytic performance
; Energy conversion and storages
; Fourier transform infra reds
; Oxygen evolution reaction (oer)
; Synchrotron radiation photoelectron spectroscopy
; Thermodynamic and kinetic process
; Thermodynamically stable
; X ray absorption fine structures
; Oxygen evolution reaction
英文摘要: Broadly, the oxygen evolution reaction (OER) has been deeply understood as a significant part of energy conversion and storage. Nevertheless, the anions in the OER catalysts have been neglected for various reasons such as inactive sites, dissolution, and oxidation, amongst others. Herein, we applied a model catalyst s-Ni(OH)2 to track the anionic behavior in the catalyst during the electrochemical process to fill this gap. The advanced operando synchrotron radiation Fourier transform infrared (SR-FTIR) spectroscopy, synchrotron radiation photoelectron spectroscopy (SRPES) depth detection and differential X-ray absorption fine structure (Δ-XAFS) spectrum jointly point out that some oxidized sulfur species (SO42−) will self-optimize new Ni–S bonds during OER process. Such amazing anionic self-optimization (ASO) behavior has never been observed in the OER process. Subsequently, the optimization-derived component shows a significantly improved electrocatalytic performance (activity, stability, etc.) compared to reference catalyst Ni(OH)2. Theoretical calculation further suggests that the ASO process indeed derives a thermodynamically stable structure of the OER catalyst, and then gives its superb catalytic performance by optimizing the thermodynamic and kinetic processes in the OER, respectively. This work demonstrates the vital role of anions in the electrochemical process, which will open up new perspectives for understanding OER and provide some new ideas in related fields (especially catalysis and chemistry). © 2020 Science China Press Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170199
Appears in Collections: 气候变化与战略
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作者单位: National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026, China; Hefei National Laboratory for Physical Sciences at the Microscales, Department of Materials Sciences and Engineering, University of Science and Technology of China, Hefei, 230026, China; Institute of Amorphous Matter Science, School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
Recommended Citation:
Cao D.,Moses O.A.,Sheng B.,et al. Anomalous self-optimization of sulfate ions for boosted oxygen evolution reaction[J]. Science Bulletin,2021-01-01,66(6)