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题名: Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts
作者: Chen, Zheng1, 2;  Duan, Zhiyao3, 4;  Wang, Zhiliang1, 2;  Liu, Xiaoyan1, 2;  Gu, Lin5;  Zhang, Fuxiang1, 2;  Dupuis, Michel6, 7;  Li, Can1, 2
关键词: amorphous materials ;  cobalt ;  oxidation ;  water chemistry ;  X-ray absorption spectroscopy
刊名: CHEMCATCHEM
发表日期: 2017-10-10
DOI: 10.1002/cctc.201700882
卷: 9, 期:19, 页:3641-3645
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Artificial photosynthesis requires the practical use of efficient, robust, and economical water-oxidation catalysts (WOCs) for chemical-fuel production. The synthesis of amorphous cobalt oxide nanoparticles (ca. 2nm) is reported as a WOC with a turnover frequency up to 8.6s(-1) in the photocatalytic Ru(bpy)(3)(2+)-Na2S2O8 system (bpy=2,2-bipyridyl). This activity is unprecedented in heterogeneous cobalt-based WOCs and is even comparable to that of a state-of-the-art homogeneous cobalt-based polyoxometalate catalyst. With the help of experimental and computational X-ray absorption spectroscopy, the atomic structure of the synthesized amorphous cobalt oxide nanoparticles was characterized, and it consists of a one-dimensional chain of dimeric edge-sharing CoO6 octahedra. Theoretical calculations suggest that this structure was able to promote O-O bond coupling, unlike crystalline cobalt oxide WOCs, which led to the enhanced water-oxidation activity.
关键词[WOS]: OXYGEN REDUCTION ;  EVOLUTION ;  PHOTOSYNTHESIS ;  PERSULFATE ;  CHALLENGES ;  EFFICIENT ;  HEMATITE
语种: 英语
WOS记录号: WOS:000412656600005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150053
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 Natl Lab Clean Energy, State Key Lab Catalysis, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Texas Austin, Dept Chem, Austin, TX 78712 USA
4.Univ Texas Austin, Inst Computat & Engn Sci, Austin, TX 78712 USA
5.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
6.Univ Buffalo State Univ New York, Dept Chem & Biol Engn, Buffalo, NY 14260 USA
7.Univ Buffalo State Univ New York, Computat & Data Enabled Sci & Engn Program, Buffalo, NY 14260 USA

Recommended Citation:
Chen, Zheng,Duan, Zhiyao,Wang, Zhiliang,et al. Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts[J]. CHEMCATCHEM,2017,9(19):3641-3645.
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