Photocatalytic Formation of Hydrogen Peroxide in Aqueous Suspensions of Titanium Dioxide Supported with Palladium

IF 1.3 4区化学 Q4 CHEMISTRY, PHYSICAL Kinetics and Catalysis Pub Date : 2025-02-25 DOI:10.1134/S0023158424602432

T. R. Fazliev, A. V. Bukhtiyarov, D. S. Selishchev

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Abstract

This paper shows the results of a study on hydrogen peroxide formation in aqueous suspensions of anatase or rutile titanium dioxide with palladium particles deposited on its surface under the action of UV radiation. The formation of peroxide species on the photocatalyst surface was confirmed by IR spectroscopy, and the quantitative determination of hydrogen peroxide in solution was carried out by a colorimetric method using a special reagent containing peroxidase. To determine the pathway of peroxide compound formation, the effect of the composition of the gas phase (Ar, O₂) and liquid (water or aqueous methanol solution) on the accumulation of H₂O₂ was studied. The Pd-modified photocatalyst based on rutile exhibited significantly higher activity compared to that of the anatase-based photocatalyst. In both cases, the highest yield of H₂O₂ was achieved due to oxygen photoreduction upon the addition of methanol as an additional electron donor, which provided an increase in the rate of hole transfer as a rate-limiting step.

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来源期刊

Kinetics and Catalysis 化学-物理化学

CiteScore

2.10

自引率

27.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Kinetics and Catalysis Russian is a periodical that publishes theoretical and experimental works on homogeneous and heterogeneous kinetics and catalysis. Other topics include the mechanism and kinetics of noncatalytic processes in gaseous, liquid, and solid phases, quantum chemical calculations in kinetics and catalysis, methods of studying catalytic processes and catalysts, the chemistry of catalysts and adsorbent surfaces, the structure and physicochemical properties of catalysts, preparation and poisoning of catalysts, macrokinetics, and computer simulations in catalysis. The journal also publishes review articles on contemporary problems in kinetics and catalysis. The journal welcomes manuscripts from all countries in the English or Russian language.