Pt/CeO2 Catalysts Prepared by Laser Vaporization: Morphology, Structure, Platinum State, and Catalytic Properties in CO Oxidation Reaction | Sciact - CRIS-система Института катализа

Pt/CeO2 Catalysts Prepared by Laser Vaporization: Morphology, Structure, Platinum State, and Catalytic Properties in CO Oxidation Reaction Научная публикация

Журнал

ChemCatChem
ISSN: 1867-3880 , E-ISSN: 1867-3899

Вых. Данные

Год: 2025, Номер статьи : e01107, Страниц : 20 DOI: 10.1002/cctc.202501107

Ключевые слова

CO oxidation • Laser Vaporization • Pt/CeO2 • PtOxclusters • Single atom

Авторы

Stonkus Olga A. ¹ , Slavinskaya Elena M. ¹ , Kibis Lidiya S. ¹ , Kardash Tatyana Yu. ¹ , Svetlichnyi Valery A. ² , Stadnichenko Andrey I. ¹ , Lashina Elena A. ¹ , Kostyukov Anton I. ¹ , Snytnikov Valery N. ¹ , Romanenko Anatolii V. ¹ , Boronin Andrei I. ¹

Организации

1	Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, Novosibirsk 630090, Russia
2	Tomsk State University, Lenina. Av. 36, Tomsk 634050, Russia

Информация о финансировании (1)

Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)

ГЗ-2024-2028

A new laser vaporization (LAVA) method for the synthesis of CeO2 nanoparticles, allowed the synthesis of support samples with widely variable surface area and particle sizes. The LAVA-synthesized CeO2 nanoparticles exhibit a high degree of crystallinity, characterized by the absence of intracrystalline porosity, but high surface defectiveness and a well-developed interblock structure. Platinum deposition produces highly dispersed species, including isolated ions (single atoms Pt2+-SA), ion associates (2D-PtOx rafts), and oxidized 3D-PtOx clusters. The catalyst with the largest surface area and the smallest mean particle size of CeO2 contains platinum mainly in the Pt2+-SA form, owing to its strongest chemical interaction with the surface of small-sized nanoparticles. This highly dispersed catalyst does not exhibit low-temperature activity in CO oxidation, since ignition of the reaction is only observed at T > 150 °C. The catalysts with reduced surface area contain both Pt2+-SA and 3D-PtOx clusters located at extended surface defects and along interblock boundaries. The formation of 3D-PtOx cluster species results in a significant enhancement of the catalytic activity. The most notable catalytic effect is observed for the lowest surface area catalysts, for which CO conversion shows low-temperature activity with the reaction ignition occurring at sub-zero temperatures.

Stonkus O.A. , Slavinskaya E.M. , Kibis L.S. , Kardash T.Y. , Svetlichnyi V.A. , Stadnichenko A.I. , Lashina E.A. , Kostyukov A.I. , Snytnikov V.N. , Romanenko A.V. , Boronin A.I.
Pt/CeO2 Catalysts Prepared by Laser Vaporization: Morphology, Structure, Platinum State, and Catalytic Properties in CO Oxidation Reaction
ChemCatChem. 2025. e01107 :1-20. DOI: 10.1002/cctc.202501107 WOS Scopus OpenAlex

Поступила в редакцию:	8 июл. 2025 г.
Принята к публикации:	30 сент. 2025 г.
Опубликована online:	30 окт. 2025 г.

Web of science:	WOS:001611288100001
Scopus:	2-s2.0-105021363984
OpenAlex:	W7104511902

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