Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts
Chen, Zheng1,2; Duan, Zhiyao3,4; Wang, Zhiliang1,2; Liu, Xiaoyan1,2; Gu, Lin5; Zhang, Fuxiang1,2; Dupuis, Michel6,7; Li, Can1,2
KeywordAmorphous Materials Cobalt Oxidation Water Chemistry X-ray Absorption Spectroscopy
Source PublicationCHEMCATCHEM
Indexed BySCI
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
AbstractArtificial 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.
WOS IDWOS:000412656600005
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Document Type期刊论文
Affiliation1.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
GB/T 7714
Chen, Zheng,Duan, Zhiyao,Wang, Zhiliang,et al. Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts[J]. CHEMCATCHEM,2017,9(19):3641-3645.
APA Chen, Zheng.,Duan, Zhiyao.,Wang, Zhiliang.,Liu, Xiaoyan.,Gu, Lin.,...&Li, Can.(2017).Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts.CHEMCATCHEM,9(19),3641-3645.
MLA Chen, Zheng,et al."Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts".CHEMCATCHEM 9.19(2017):3641-3645.
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