One-Compartment Hydrogen Peroxide-Photofuel Cell Using TiO2 Photoanode and Prussian Blue Cathode. Issue 5 (28th March 2018)

• Record Type: Journal Article
• Authors: Akita, Atsunobu; Masuda, Takumi; Fujiwara, Keigo; Fujishima, Musashi; Tada, Hiroaki
• Is Part Of: Journal of the Electrochemical Society. Volume 165:Issue 5(2018)
• Page Start: F300
• Page End: F304
• Publication Date: 2018-03-28
• Subjects: Hydrogen peroxide -- Photocatalyst -- Photofuel cell; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0591805jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : We have studied the factors affecting the performances of one-compartment hydrogen peroxide photofuel cell (H2 O2 -PFC) consisting of TiO2 photoanode, cathode, and an aqueous electrolyte solution. As the photoanode, a dense TiO2 film was formed on fluorine-doped tin oxide by a dip-coating method (d-TiO2 /FTO) with the thickness controlled below ∼0.5 μm, and a mesoporous TiO2 nanocrystalline film with a thickness of 3.6 μm was coated on FTO (mp-TiO2 /FTO) by a doctor blade method. The d-TiO2 /FTO provides performances superior to mp-TiO2 /FTO in spite that the decrease in the surface area. Building a compact TiO2 underlayer by a spray method (d-TiO2 /s-TiO2 /FTO) results in further improvement of the cell performances. On the other hand, the replacement of glassy carbon cathode by Prussian Blue-electrodeposited FTO drastically increases the cell performances due to its excellent electrocatalytic activity for the H2 O2 reduction. A one-compartment H2 O2 -PFC with the structure of d-TiO2 /s-TiO2 /FTO (photoanode) | 0.1 M NaClO4 and 0.1 M H2 O2 (pH 3, electrolyte solution) | PB/FTO (cathode) exhibits short-circuit current ( J sc ) of 1.57 mA cm −2 and open-circuit voltage ( V oc ) of 787 mV.