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题名: Zinc-cobalt oxides as efficient water oxidation catalysts: the promotion effect of ZnO
作者: Rong, Feng1, 2;  Zhao, Jiao1;  Su, Panpan1, 2;  Yao, Yi1, 2;  Li, Mingrun1;  Yang, Qihua1;  Li, Can1
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2015
DOI: 10.1039/c4ta06527a
卷: 3, 期:7, 页:4010-4017
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Energy & Fuels ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Materials Science
英文摘要: Herein, 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.
关键词[WOS]: RAY-ABSORPTION SPECTROSCOPY ;  OXYGEN EVOLUTION REACTION ;  LAYERED DOUBLE HYDROXIDE ;  PHOTOSYSTEM-II ;  METAL-OXIDES ;  NANOPARTICLES ;  CO ;  LIGHT ;  NI ;  ELECTROCATALYST
语种: 英语
WOS记录号: WOS:000349447200094
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145943
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.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:
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.
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