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Issue 7, 2018
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Modification of BiVO4/WO3 composite photoelectrodes with Al2O3via chemical vapor deposition for highly efficient oxidative H2O2 production from H2O

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Abstract

The modification of a BiVO4/WO3 photoelectrode with Al2O3 by a chemical vapor deposition (CVD) method significantly improved the faradaic efficiency for H2O2 production (FE(H2O2)) in the photoelectrochemical oxidation of H2O. The faradaic efficiency after passing 0.9 C (after photoirradiation for 15 min using simulated solar light) was 80% using a 2.0 M KHCO3 aqueous solution as an electrolyte. The initial FE(H2O2) (<0.02 C) was almost 100% on the Al2O3/BiVO4/WO3 photoelectrode. The thin Al2O3 layer prevents the oxidative decomposition of the produced H2O2 into O2. The applied bias photon to current efficiency (ABPE) was 2.57% based on H2O2 and O2 production on the photoanode and H2 production on a Pt cathode. Solar light driven simultaneous H2O2 production at the anode for H2O oxidation and the cathode for O2 reduction was also achieved by combining a noble-metal-free biomass-derived carbon cathode without applying any external bias.

Graphical abstract: Modification of BiVO4/WO3 composite photoelectrodes with Al2O3via chemical vapor deposition for highly efficient oxidative H2O2 production from H2O

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Publication details

The article was received on 14 Feb 2018, accepted on 14 May 2018 and first published on 04 Jun 2018


Article type: Paper
DOI: 10.1039/C8SE00070K
Citation: Sustainable Energy Fuels, 2018,2, 1621-1629
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    Modification of BiVO4/WO3 composite photoelectrodes with Al2O3via chemical vapor deposition for highly efficient oxidative H2O2 production from H2O

    Y. Miyase, S. Takasugi, S. Iguchi, Y. Miseki, T. Gunji, K. Sasaki, E. Fujita and K. Sayama, Sustainable Energy Fuels, 2018, 2, 1621
    DOI: 10.1039/C8SE00070K

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