Observing the Electrochemical Oxidation of Co Metal at the Solid/Liquid Interface Using Ambient Pressure X-ray Photoelectron Spectroscopy

doi:10.1021/acs.jpcb.7b05982

	Observing the Electrochemical Oxidation of Co Metal at the Solid/Liquid Interface Using Ambient Pressure X-ray Photoelectron Spectroscopy
	Han, Yong1,2 ; Axnanda, Stephanus 3; Crumlin, Ethan J.3; Chang, Rui 1; Mao, Baohua 1; Hussain, Zahid 3; Ross, Philip N.4; Li, Yimin1,2 ; Liu, Zhi1,2
	2018-01-18
发表期刊	JOURNAL OF PHYSICAL CHEMISTRY B
ISSN	1520-6106
卷号	122 期号:2 页码:666-671
发表状态	已发表
DOI	10.1021/acs.jpcb.7b05982
摘要	Recent advances of ambient pressure X-ray photoelectron spectroscopy (AP-XPS) have enabled the chemical composition and the electrical potential profile at a liquid/electrode interface under electrochemical reaction conditions to be directly probed. In this work, we apply this operando technique to study the surface chemical composition evolution on a Co metal electrode in 0.1 M KOH aqueous solution under various electrical biases. It is found that an similar to 12.2 nm-thick layer of Co(OH)(2) forms at a potential of about -0.4 V-Ag/AgCl, and upon increasing the anodic potential to about +0.4 V-Ag/Cl, this layer is partially oxidized into cobalt oxyhydroxide (CoOOH). A CoOOH/Co(OH)(2) mixture layer is formed on the top of the electrode surface. Finally, the oxidized surface layer can be reduced to Co-0 at a cathodic potential of -1.35 V-Ag/Cl. These observations indicate that the ultrathin layer containing cobalt oxyhydroxide is the active phase for oxygen evolution reaction (OER) on a Co electrode in an alkaline electrolyte, consistent with previous studies.
收录类别	SCI ; SCIE ; EI
语种	英语
资助项目	Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy[DE-AC02-05CH11231]
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
WOS记录号	WOS:000423140600033
出版者	AMER CHEMICAL SOC
EI入藏号	20180404676026
EI主题词	Alkalinity ; Cobalt ; Electrochemical oxidation ; Electrodes ; Electrolytes ; Oxidation ; Photoelectrons ; Photons ; Potash ; Potassium compounds ; Solutions
EI分类号	Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Electric Batteries and Fuel Cells:702 ; Chemistry, General:801.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Atomic and Molecular Physics:931.3
WOS关键词	OXYGEN EVOLUTION REACTION ; NICKEL-HYDROXIDE ; COBALT OXIDE ; ALKALINE-SOLUTION ; PROTON DIFFUSION ; WATER ; CATALYSTS ; CO3O4 ; XPS ; REDUCTION
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/16296
专题	大科学中心_PI研究组_刘志组物质科学与技术学院物质科学与技术学院_特聘教授组_李毅敏组
通讯作者	Li, Yimin; Liu, Zhi
作者单位	1.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China 2.Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China 3.Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA 4.Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA
第一作者单位	物质科学与技术学院
通讯作者单位	物质科学与技术学院
推荐引用方式 GB/T 7714	Han, Yong,Axnanda, Stephanus,Crumlin, Ethan J.,et al. Observing the Electrochemical Oxidation of Co Metal at the Solid/Liquid Interface Using Ambient Pressure X-ray Photoelectron Spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2018,122(2):666-671.
APA	Han, Yong.,Axnanda, Stephanus.,Crumlin, Ethan J..,Chang, Rui.,Mao, Baohua.,...&Liu, Zhi.(2018).Observing the Electrochemical Oxidation of Co Metal at the Solid/Liquid Interface Using Ambient Pressure X-ray Photoelectron Spectroscopy.JOURNAL OF PHYSICAL CHEMISTRY B,122(2),666-671.
MLA	Han, Yong,et al."Observing the Electrochemical Oxidation of Co Metal at the Solid/Liquid Interface Using Ambient Pressure X-ray Photoelectron Spectroscopy".JOURNAL OF PHYSICAL CHEMISTRY B 122.2(2018):666-671.