Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts

Zheng Chen, Zhiyao Duan, Zhiliang Wang, Xiaoyan Liu, Lin Gu, Fuxiang Zhang, Michel Dupuis, Can Li

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

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. 2 nm) is reported as a WOC with a turnover frequency up to 8.6 s−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.

Original languageEnglish
Pages (from-to)3641-3645
Number of pages5
JournalChemCatChem
Volume9
Issue number19
DOIs
Publication statusPublished - Oct 10 2017

Fingerprint

cobalt oxides
Cobalt
Nanoparticles
catalysts
Oxidation
nanoparticles
oxidation
Catalysts
Oxides
Water
water
chemical fuels
cobalt
fuel production
2,2'-Dipyridyl
X ray absorption spectroscopy
photosynthesis
Photosynthesis
atomic structure
absorption spectroscopy

Keywords

  • amorphous materials
  • cobalt
  • oxidation
  • water chemistry
  • X-ray absorption spectroscopy

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

Cite this

Chen, Z., Duan, Z., Wang, Z., Liu, X., Gu, L., Zhang, F., ... Li, C. (2017). Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts. ChemCatChem, 9(19), 3641-3645. https://doi.org/10.1002/cctc.201700882

Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts. / Chen, Zheng; Duan, Zhiyao; Wang, Zhiliang; Liu, Xiaoyan; Gu, Lin; Zhang, Fuxiang; Dupuis, Michel; Li, Can.

In: ChemCatChem, Vol. 9, No. 19, 10.10.2017, p. 3641-3645.

Research output: Contribution to journalArticle

Chen, Z, Duan, Z, Wang, Z, Liu, X, Gu, L, Zhang, F, Dupuis, M & Li, C 2017, 'Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts', ChemCatChem, vol. 9, no. 19, pp. 3641-3645. https://doi.org/10.1002/cctc.201700882
Chen Z, Duan Z, Wang Z, Liu X, Gu L, Zhang F et al. Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts. ChemCatChem. 2017 Oct 10;9(19):3641-3645. https://doi.org/10.1002/cctc.201700882
Chen, Zheng ; Duan, Zhiyao ; Wang, Zhiliang ; Liu, Xiaoyan ; Gu, Lin ; Zhang, Fuxiang ; Dupuis, Michel ; Li, Can. / Amorphous Cobalt Oxide Nanoparticles as Active Water-Oxidation Catalysts. In: ChemCatChem. 2017 ; Vol. 9, No. 19. pp. 3641-3645.
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