Acetylene Selective Hydrogenation over Low-Content Pd Catalysts Based on Different Alumina Modifications | Sciact - CRIS-система Института катализа

Acetylene Selective Hydrogenation over Low-Content Pd Catalysts Based on Different Alumina Modifications Научная публикация

Журнал

Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694

Вых. Данные

Год: 2026, Том: 453, Номер статьи : 116538, Страниц : 13 DOI: 10.1016/j.jcat.2025.116538

Ключевые слова

Hydrogenation of acetylene; palladium-alumina catalysts; laser electrodispersion; incipient wetness impregnation; metal-support interactions

Авторы

Veselov Grigory B. ¹ , Rostovshchikova Tatiana N. ² , Krotova Irina N. ² , Nikolaev Sergey A. ² , Maslakov Konstantin I. ² , Gurevich Sergey A. ³ , Yavsin Denis A. ³ , Shlyapin Dmitry A. ¹ , Vedyagin Aleksey A. ¹

Организации

1	Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
2	Lomonosov Moscow State University, Moscow 119991, Russia
3	Ioffe Institute, St. Petersburg 194021, Russia

Информация о финансировании (3)

1	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	0040-2019-0010
2	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	АААА-А21-121011590090-7
3	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	FWUR-2024-0034

A series of alumina-based catalysts containing from 0.004 to 0.01 wt% of palladium were prepared via laser electrodispersion and impregnation methods. Three alumina modifications, γ-Al2O3, θ-Al2O3, and α-Al2O3, were used as supports. In the case of the laser electrodispersion method, Pd particles of 2.5 nm in size were evenly distributed on the outer surface of the alumina grains. Contrarily, the impregnation procedure provided the distribution of Pd throughout the whole volume of the support. The catalytic properties of the prepared samples were studied in an acetylene hydrogenation reaction. As found, the catalysts prepared by laser electrodispersion possess a slightly lower activity along with a higher selectivity compared to the impregnated ones. The phase modification of alumina was found to affect the catalytic behavior noticeably. Thus, a decrease in acetylene conversion and an increase in ethylene selectivity were observed for the following order: θ-Al2O3 > γ-Al2O3 > α-Al2O3. The main factors defining the efficiency of the catalysts are metal-support interactions, electronic state, and dispersion and distribution of Pd on the alumina surface. The strongest metal-support interaction was observed for the Pd/θ-Al2O3 sample prepared by laser electrodispersion. This sample has the highest content of Pd2+ species and exhibits high activity but low selectivity to ethylene. In the case of the α-Al2O3 support, Pd particles are located close to each other on the outer surface and, therefore, undergo fast deactivation. The X-ray photoelectron spectroscopy data revealed the carbon accumulation during the reaction for all the studied samples.

Veselov G.B. , Rostovshchikova T.N. , Krotova I.N. , Nikolaev S.A. , Maslakov K.I. , Gurevich S.A. , Yavsin D.A. , Shlyapin D.A. , Vedyagin A.A.
Acetylene Selective Hydrogenation over Low-Content Pd Catalysts Based on Different Alumina Modifications
Journal of Catalysis. 2026. V.453. 116538 :1-13. DOI: 10.1016/j.jcat.2025.116538 WOS Scopus OpenAlex

Поступила в редакцию:	16 июл. 2025 г.
Принята к публикации:	31 окт. 2025 г.
Опубликована online:	5 нояб. 2025 г.
Опубликована в печати:	1 янв. 2026 г.

Web of science:	WOS:001617937600001
Scopus:	2-s2.0-105021026695
OpenAlex:	W4415930426

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