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Influence of Pt Oxidation State on the Activity and Selectivity of g-C3N4-Based Photocatalysts in H2 Evolution Reaction Full article

Journal Applied Sciences (Switzerland)
ISSN: 2076-3417
Output data Year: 2023, Volume: 13, Number: 21, Article number : 11739, Pages count : 13 DOI: 10.3390/app132111739
Tags photocatalysis; photocatalytic H2 evolution; g-C3N4; platinum; visible light; ethanol
Authors Kurenkova Anna Yu. 1 , Saraev Andrey A. 1,2 , Mishchenko Denis D. 1,2 , Gerasimov Evgeny Yu. 1 , Kozlova Ekaterina A. 1
Affiliations
1 Federal Research Center, Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave. 5, 630090 Novosibirsk, Russia
2 Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, Nikol’skiy Ave. 1, 630559 Kol’tsovo, Russia

Funding (1)

1 Ministry of Science and Higher Education of the Russian Federation 075-15-2022-263

Abstract: Graphitic carbon nitride g-C3N4 has been modified using platinum and platinum oxide (0.5–5 wt.%) and studied in photocatalytic H2 evolution reactions with ethanol aqueous solution under visible light irradiation (λ = 409 nm). An analysis of the by-products of the reaction (CO2, CH4, C2H6 etc.) was also carried out. The morphology, particle size distribution, and optical properties of the photocatalysts, and the chemical states of platinum cations were examined using various methods. The photocatalysts were investigated using a wide range of methods to clarify the morphology, particle size distribution, optical properties, and the chemical states of platinum cations. Factors affecting not only the activity, but also the selectivity of the photocatalyst in the target process of hydrogen production, have been established. The highest rate of H2 evolution achieved over 0.5 wt.% Pt/g-C3N4 photocatalyst is 0.6 mmol h−1 g−1 (selectivity 98.9%), which exceeds the activity of pristine g-C3N4 by 250 times. Increasing the Pt or PtO content up to 5 wt.% leads to an increase in the rate of formation of by-products (CH4, C2H6, and CO2) and a decrease in the selectivity of H2 evolution. The study also delves into the role of platinum and the mechanism of charge transfer in PtO/g-C3N4 and Pt/g-C3N4 photocatalysts due to light irradiation.
Cite: Kurenkova A.Y. , Saraev A.A. , Mishchenko D.D. , Gerasimov E.Y. , Kozlova E.A.
Influence of Pt Oxidation State on the Activity and Selectivity of g-C3N4-Based Photocatalysts in H2 Evolution Reaction
Applied Sciences (Switzerland). 2023. V.13. N21. 11739 :1-13. DOI: 10.3390/app132111739 WOS Scopus РИНЦ AN OpenAlex publication_identifier_short.sciact_skif_identifier_type
Dates:
Submitted: Sep 21, 2023
Accepted: Oct 25, 2023
Published online: Oct 26, 2023
Published print: Nov 1, 2023
Identifiers:
Web of science: WOS:001103269200001
Scopus: 2-s2.0-85192397099
Elibrary: 56442932
Chemical Abstracts: 2023:2346570
OpenAlex: W4387972936
publication_identifier.sciact_skif_identifier_type: 1843
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