Issue 1, 2018

Efficient hypochlorous acid (HClO) production via photoelectrochemical solar energy conversion using a BiVO4-based photoanode

Abstract

A BiVO4/WO3/FTO (FTO: fluorine doped tin oxide coated glass) multilayer photoelectrode was found to be suitable for photoelectrochemical oxidative hypochlorous acid (HClO) production from chloride ions (Cl). HClO was efficiently produced in the electrolyte solution by irradiating the BiVO4/WO3/FTO photoanode with simulated solar light. It was expected that Cl would be oxidized to chlorine (Cl2) by the photogenerated holes on the BiVO4, and then converted to HClO via the disproportionation reaction in an aqueous electrolyte solution. For the first 100 s, the current efficiency for HClO production was 97%, indicating that the photogenerated hole oxidized Cl with high selectivity in preference to H2O. Moreover, the BiVO4/WO3/FTO multilayer photoanode enabled us to achieve significant diminution of the external bias required for HClO production under solar light irradiation.

Graphical abstract: Efficient hypochlorous acid (HClO) production via photoelectrochemical solar energy conversion using a BiVO4-based photoanode

Supplementary files

Article information

Article type
Paper
Submitted
16 Gwen. 2017
Accepted
11 Here 2017
First published
11 Here 2017

Sustainable Energy Fuels, 2018,2, 155-162

Efficient hypochlorous acid (HClO) production via photoelectrochemical solar energy conversion using a BiVO4-based photoanode

S. Iguchi, Y. Miseki and K. Sayama, Sustainable Energy Fuels, 2018, 2, 155 DOI: 10.1039/C7SE00453B

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