Observing the Electrochemical Oxidation of Co Metal at the Solid/Liquid Interface Using Ambient Pressure X-ray Photoelectron Spectroscopy
Han, Yong1,2; Axnanda, Stephanus3; Crumlin, Ethan J.3; Chang, Rui1; Mao, Baohua1; Hussain, Zahid3; Ross, Philip N.4; Li, Yimin1,2; Liu, Zhi1,2
2018-01-18
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume122Issue:2Pages:666-671
Status已发表
DOI10.1021/acs.jpcb.7b05982
AbstractRecent 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.
Indexed BySCI ; EI
Language英语
Funding ProjectOffice of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy[DE-AC02-05CH11231]
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000423140600033
PublisherAMER CHEMICAL SOC
EI Accession Number20180404676026
EI KeywordsAlkalinity ; Cobalt ; Electrochemical oxidation ; Electrodes ; Electrolytes ; Oxidation ; Photoelectrons ; Photons ; Potash ; Potassium compounds ; Solutions
EI Classification NumberNonferrous 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 KeywordOXYGEN EVOLUTION REACTION ; NICKEL-HYDROXIDE ; COBALT OXIDE ; ALKALINE-SOLUTION ; PROTON DIFFUSION ; WATER ; CATALYSTS ; CO3O4 ; XPS ; REDUCTION
Original Document TypeArticle
Citation statistics
Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://kms.shanghaitech.edu.cn/handle/2MSLDSTB/16296
Collection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
Corresponding AuthorLi, Yimin; Liu, Zhi
Affiliation1.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
First Author AffilicationSchool of Physical Science and Technology
Corresponding Author AffilicationSchool of Physical Science and Technology
Recommended Citation
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.
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