Methanol Photoelectrooxidation on Hematite Films Modified with TiO2, Bi, and Co

Photoelectrocatalytic oxidation of methanol was studied on thin-film nanocrystalline hematite electrodes prepared by the sol–gel method and doped by TiO 2 , Bi, and Co. The modification of hematite is shown to lead to its transformation into a material demonstrating high activity in the photoelectro...

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Bibliographic Details
Published in:Russian journal of electrochemistry 2022-08, Vol.58 (8), p.667-675
Main Authors: Grinberg, V. A., Emets, V. V., Mayorova, N. A., Averin, A. A., Tsodikov, M. V., Maslov, D. A.
Format: Article
Language:English
Subjects:
Bismuth
Chemistry
Chemistry and Materials Science
Electrochemistry
Hematite
Methanol
Oxidation
Photoelectric effect
Physical Chemistry
Pollutants
Sol-gel processes
Thin films
Titanium dioxide
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Summary:Photoelectrocatalytic oxidation of methanol was studied on thin-film nanocrystalline hematite electrodes prepared by the sol–gel method and doped by TiO 2 , Bi, and Co. The modification of hematite is shown to lead to its transformation into a material demonstrating high activity in the photoelectrochemical process of methanol oxidation under illumination in the visible range of the spectrum. According to the data of photocurrent modulation spectroscopy, this is due to a decrease in the rate of recombination of electron–hole pairs generated by light. Therefore, thin-film photoanodes based on modified hematite have good prospects for practical application in the photoelectrochemical degradation of organic pollutants.
ISSN:1023-1935
1608-3342
DOI:10.1134/S1023193522080055