典型文献
In situ revealing the reconstruction behavior of monolayer rocksalt CoO nanosheet as water oxidation catalyst
文献摘要：
The reconstruction during oxygen evolution reaction(OER)significantly affects the electronic and local geometry structure of metal sites in electrocatalyst.Compared with well-investigated cobalt-based mate-rials,the reconstruction of rocksalt CoO with purely Co2+in octahedral(Oh)coordination has not been revealed in detail.Herein,monolayer CoO supported on reduced graphene oxide(rGO)was synthesized via a one-pot hydrothermal strategy with calcinating in Ar atmosphere.The structure evolution of two-dimension(2D)CoO/rGO during OER was revealed by in situ X-ray absorption spectroscopy(XAS).The transition from CoO toward Co3O4 already occurred at open circuit potential,further enhanced at 1.23 V(vs.RHE).The CoOx(OH)y was determined as the active phase at 1.53 V,displaying a tetrahedral Co coordination defective spinel Co3O4 with the Co-O shell that featured the(oxy)hydroxide,not the stan-dard CoOOH.After OER,the irreversible transition from CoO to Co3O4 was observed.In contrast,in situ Raman spectra revealed a reversible amorphization process on Co3O4/rGO under operation conditions.Furthermore,this study indicated that the reconstruction behavior could be more effectively revealed by XAS using 2D materials.
文献关键词：
中图分类号：
作者姓名：
Weiqi Guo;Haolin Luo;Dongxu Fang;Zhi Jiang;Jiasheng Chi;Wenfeng Shangguan
作者机构：
Research Center for Combustion and Environment Technology,Shanghai Jiao Tong University,Shanghai 200240,China;Center of Hydrogen Science,Shanghai Jiao Tong University,Shanghai 200240,China
文献出处：
引用格式：
[1]Weiqi Guo;Haolin Luo;Dongxu Fang;Zhi Jiang;Jiasheng Chi;Wenfeng Shangguan-.In situ revealing the reconstruction behavior of monolayer rocksalt CoO nanosheet as water oxidation catalyst)[J].能源化学,2022(07):373-381
A类：
rocksalt,Co2+in
B类：
In,situ,revealing,reconstruction,behavior,monolayer,nanosheet,water,oxidation,during,oxygen,evolution,reaction,OER,significantly,affects,electronic,local,geometry,structure,metal,sites,electrocatalyst,Compared,well,investigated,cobalt,purely,octahedral,Oh,coordination,not,been,revealed,detail,Herein,supported,reduced,graphene,rGO,was,synthesized,via,one,hydrothermal,strategy,calcinating,Ar,atmosphere,two,dimension,2D,by,ray,absorption,spectroscopy,XAS,transition,from,toward,Co3O4,already,occurred,open,circuit,potential,further,enhanced,RHE,CoOx,determined,active,phase,displaying,tetrahedral,defective,spinel,shell,that,featured,hydroxide,stan,dard,CoOOH,After,irreversible,observed,contrast,Raman,spectra,amorphization,process,under,operation,conditions,Furthermore,this,study,indicated,could,effectively,using,materials
AB值：
0.579298
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