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CoOx nanoparticle anchored on sulfonated-graphite as efficient water oxidation catalyst

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Abstract

Development of efficient, robust and earth-abundant water oxidation catalysts (WOCs) is extremely desirable for water splitting by electrolysis or photocatalysis. Herein, we report cobalt oxide nanoparticles anchored on the surface of sulfonated graphite (denoted as “CoOx@G-Ph-SN”) to exhibit unexpectedly efficient water oxidation activity with a turnover frequency (TOF) of 1.2 s−1; two or three orders of magnitude higher than most cobalt-based oxide WOCs reported so far. The CoOx@G-Ph-SN nanocomposite can be easily prepared by a soft hydrothermal route to have an average CoOx size below 2 nm. Additionally, the loading of CoOx@G-Ph-SN catalyst on the surface of a BiVO4 or Fe2O3 photoanode can boost remarkably the photoanode currents for robust photocatalytic water oxidation under visible light irradiation. Its excellent activity and photochemical stability for water oxidation suggest that this ultrasmall cobalt-based composite is a promising candidate for solar fuel production.

Graphical abstract: CoOx nanoparticle anchored on sulfonated-graphite as efficient water oxidation catalyst

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Publication details

The article was received on 20 Apr 2017, accepted on 24 Jun 2017 and first published on 26 Jun 2017


Article type: Edge Article
DOI: 10.1039/C7SC01756A
Citation: Chem. Sci., 2017, Advance Article
  • Open access: Creative Commons BY license
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    CoOx nanoparticle anchored on sulfonated-graphite as efficient water oxidation catalyst

    J. Guan, C. Ding, R. Chen, B. Huang, X. Zhang, F. Fan, F. Zhang and C. Li, Chem. Sci., 2017, Advance Article , DOI: 10.1039/C7SC01756A

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