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Zinc-cobalt oxides as efficient water oxidation catalysts: the promotion effect of ZnO
Rong, Feng1,2; Zhao, Jiao1; Su, Panpan1,2; Yao, Yi1,2; Li, Mingrun1; Yang, Qihua1; Li, Can1
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
2015
DOI10.1039/c4ta06527a
Volume3Issue:7Pages:4010-4017
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS KeywordRAY-ABSORPTION SPECTROSCOPY ; OXYGEN EVOLUTION REACTION ; LAYERED DOUBLE HYDROXIDE ; PHOTOSYSTEM-II ; METAL-OXIDES ; NANOPARTICLES ; CO ; LIGHT ; NI ; ELECTROCATALYST
AbstractHerein, we report the promotion effect of ZnO in water oxidation catalyzed by Co. Zinc-cobalt oxides-ZnCoxOy were prepared via the calcination of Zn-Cox-coordination polymers. The results of XRD, Co Kedge XANES and EXAFS show that the Co/Zn ratio greatly affected the oxidation state of Co and local structure of the ZnCoxOy oxides. With a Co/Zn ratio higher than 3.0, Zn(II) prefers to substitute in the lattice of Co3O4. The integrated ZnO and Co3O4 composites were formed at a Co/Zn ratio less than 2.0. The HR-TEM images show that ZnO and Co3O4 compactly contact to form the interfaces in the composites. In both the chemical water oxidation and the visible-light-driven photocatalytic water oxidation ([Ru(bpy)3](2+)-persulfate system), Zn substituted in the spinel structured Co3O4 oxide cannot significantly improve the water oxidation activity and only the integrated ZnO and Co3O4 composites afford much higher TOFs than Co3O4. This suggests the existence of the cooperation effect between ZnO (water adsorption site) and Co3O4 (water oxidation site). Our results provide a facile approach to design composite catalysts for the water oxidation reaction.
Language英语
WOS IDWOS:000349447200094
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/145943
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Rong, Feng,Zhao, Jiao,Su, Panpan,et al. Zinc-cobalt oxides as efficient water oxidation catalysts: the promotion effect of ZnO[J]. JOURNAL OF MATERIALS CHEMISTRY A,2015,3(7):4010-4017.
APA Rong, Feng.,Zhao, Jiao.,Su, Panpan.,Yao, Yi.,Li, Mingrun.,...&Li, Can.(2015).Zinc-cobalt oxides as efficient water oxidation catalysts: the promotion effect of ZnO.JOURNAL OF MATERIALS CHEMISTRY A,3(7),4010-4017.
MLA Rong, Feng,et al."Zinc-cobalt oxides as efficient water oxidation catalysts: the promotion effect of ZnO".JOURNAL OF MATERIALS CHEMISTRY A 3.7(2015):4010-4017.
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