Structure–Performance Relationships in Ag–Cu/CeO2–SnO2–ZrO2 Bimetallic Catalysts for Soot Combustion and CO Oxidation | Sciact - CRIS-система Института катализа

Structure–Performance Relationships in Ag–Cu/CeO2–SnO2–ZrO2 Bimetallic Catalysts for Soot Combustion and CO Oxidation Научная публикация

Журнал

Industrial and Engineering Chemistry Research
ISSN: 0888-5885 , E-ISSN: 1520-5045

Вых. Данные

Год: 2025, Том: 64, Номер: 36, Страницы: 17311–17327 Страниц : 17 DOI: 10.1021/acs.iecr.5c01658

Авторы

Murtazalieva Anna M. ¹ , Grabchenko Maria V. ¹ , Stonkus Olga A. ² , Salaev Mikhail A. ¹

Организации

1	Tomsk State University, 634050 Tomsk, Russia
2	Boreskov Institute of Catalysis SB RAS (BIC SB RAS), 630090 Novosibirsk, Russia

Информация о финансировании (1)

Российский научный фонд

23-73-00109

The interplay between structural, compositional, and morphological features of catalysts and their catalytic performance has become crucial in engineering new generations of highly effective materials. Here, a series of Ag–Cu/CeO2–SnO2–ZrO2 catalysts with different Ag/Cu mass ratios and low total metal loading (only 2% wt) is synthesized using a sequential wet impregnation method and tested in CO oxidation and soot combustion. The resulting bimetallic 0.5Ag–1.5Cu and 1Ag–1Cu catalysts show high activity in both reactions. After aging at 650 °C for 10 h, the catalysts with a higher Cu content show improved activity in CO oxidation and only a slight decrease in the Tmax of soot combustion, confirming their stability. The high activity of catalysts can be associated with the presence of dispersed CuOx clusters, the Cu+/Cu2+ ratio, the defectiveness of samples, and the presence of oxygen species involved in carbonate formation. Contacting Ag and Cu species have higher ability to adsorb gaseous CO, improving the performance. The lower activity of the as-prepared 2Ag sample can be due to the decoration of large silver particles (20 nm) with AgCl, and the effect of chloride decreases upon aging. 0.5Ag–1.5Cu and 1Ag–1Cu catalysts show high water resistance in both reactions. Tentative roles played by the catalyst components are discussed. The results obtained can be used to prepare new effective bimetallic environmental catalysts.

Murtazalieva A.M. , Grabchenko M.V. , Stonkus O.A. , Salaev M.A.
Structure–Performance Relationships in Ag–Cu/CeO2–SnO2–ZrO2 Bimetallic Catalysts for Soot Combustion and CO Oxidation
Industrial and Engineering Chemistry Research. 2025. V.64. N36. P.17311–17327. DOI: 10.1021/acs.iecr.5c01658 WOS OpenAlex

Поступила в редакцию:	24 апр. 2025 г.
Принята к публикации:	22 авг. 2025 г.
Опубликована online:	29 авг. 2025 г.
Опубликована в печати:	10 сент. 2025 г.

Web of science:	WOS:001564924000001
OpenAlex:	W4413818127

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