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Polyoxometalates Covalent Combined with Graphitic Carbon Nitride for Photocatalytic Hydrogen Peroxide Production

Abstract

The polyoxometalate (POM) cluster of [SiW11O39]8- (SiW11) with photoreductiveability has been successfully covalent combined with the graphitic carbon nitride (g-C3N4) through the organic linker strategy. The hybrid catalyst of g-C3N4-SiW11 exhibits efficient catalytic performance (15.2 μmol•h-1) for photocatalytic H2O2 production in the presence of methanol and can stabilize the formed H2O2 under sunlight irradiation (AM 1.5 filter). The Koutecky-Levich plot obtained from electrochemical rotating disk electrode (RDE) analysis of oxygen reduction reaction (ORR) for g-C3N4-SiW11 reveals the value of electron transfer during the ORR process is 2.76. Combing the electron spin resonance (ESR), Koutecky-Levich plots, O2 temperature programmed desorption (O2-TPD) and density functional theory (DFT) calculation results, the enhanced O2 adsorption of g-C3N4-SiW11 can promote the two-electron reduction of O2 to H2O2.

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Publication details

The article was received on 08 Jan 2018, accepted on 13 Feb 2018 and first published on 13 Feb 2018


Article type: Paper
DOI: 10.1039/C8CY00043C
Citation: Catal. Sci. Technol., 2018, Accepted Manuscript
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    Polyoxometalates Covalent Combined with Graphitic Carbon Nitride for Photocatalytic Hydrogen Peroxide Production

    S. zhao, X. Zhao, S. Ouyang and Y. Zhu, Catal. Sci. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C8CY00043C

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