Jump to main content
Jump to site search


Solar-light-driven non-bias photoelectrolysis for bleach production from sea water and atmospheric oxygen

Author affiliations

Abstract

Non-bias production of a bleach aqueous solution was successfully demonstrated using a solar-driven photoelectrochemical cell consisting of a metal-oxide-semiconductor photoanode and Pt-based cathode. Both hypochlorous acid (HClO) and hypobromous acid (HBrO) were generated via two-electron oxidation of chloride (Cl) and bromide (Br) at the photoanode. The faradaic efficiency for HBrO production gradually improved with increasing Br concentration in the electrolyte solution. Although a certain amount of HBrO was produced from a 1 mM NaBr aqueous solution, the co-existence of Cl drastically enhanced the amount of HBrO produced from the dilute Br solution. The use of a gas diffusion electrode (GDE) composed of a Pt/carbon catalyst layer for efficient 4-electron O2 reduction enabled us to achieve the anodic photocurrent derived from the oxidation of Cl and Br under AM-1.5 simulated solar light irradiation. Moreover, we successfully accomplished convenient and simple production of aqueous bleach from artificial sea water via irradiating the photoanode with simulated solar light without applying external bias.

Graphical abstract: Solar-light-driven non-bias photoelectrolysis for bleach production from sea water and atmospheric oxygen

Back to tab navigation

Supplementary files

Publication details

The article was received on 24 Jul 2019, accepted on 19 Sep 2019 and first published on 20 Sep 2019


Article type: Paper
DOI: 10.1039/C9SE00557A
Sustainable Energy Fuels, 2019, Advance Article

  •   Request permissions

    Solar-light-driven non-bias photoelectrolysis for bleach production from sea water and atmospheric oxygen

    S. Iguchi, H. Tateno, S. Takasugi, Y. Miseki and K. Sayama, Sustainable Energy Fuels, 2019, Advance Article , DOI: 10.1039/C9SE00557A

Search articles by author

Spotlight

Advertisements