A Pd-Cu Nanosized Catalyst Supported on γ-Al2O3 for Liquid-Phase Nitrobenzene Hydrogenation

A Pd-Cu Nanosized Catalyst Supported on γ-Al2O3 for Liquid-Phase Nitrobenzene Hydrogenation Full article

Journal

Catalysis Letters
ISSN: 1572-879X , E-ISSN: 1011-372X

Output data

Year: 2025, Volume: 155, Number: 9, Article number : 298, Pages count : DOI: 10.1007/s10562-025-05136-z

Authors

Pomogailo Svetlana I. ¹ , Shuvalova Elena V. ² , Knerel’man Evgeniya I. ³ , Tkachenko Olga P. ² , Chepaikin Evgenii G. ¹ , Pomogailo Daria A. ^2,4 , Kustov Leonid M. ^2,5

Affiliations

1	A.G. Merzhanov Institute of Structural Macrokinetics and Problems of Materials Science, 142432, Chernogolovka, Russia
2	N.D. Zelinsky Institute of organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia
3	Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432, Chernogolovka, Russia
4	D.I. Mendeleyev State University of Chemical Technology, 125480, Moscow, Russia
5	Chemistry Department, Moscow State University, 119992, Moscow, Russia

Copper nanocatalysts doped with palladium deposited on γ-Al2O3 were prepared and used for the hydrogenation of nitrobenzene. The catalysts were obtained by the formation of intermediate metal-complex compounds on the surface of the γ-Al2O3 carrier with their subsequent hydrogenolysis and reduction of the active phases of the catalyst, calcination, and additional treatment with hydrogen. The structure of the catalysts was investigated using the following. low-temperature nitrogen sorption, SEM with EDX, TEM, X-ray fluorescence analysis, XRD, and DRIFTS. DRIFT studies indicate the presence of active phases of catalysts in the form of reduced and divalent palladium and copper. According to DRIFTS-CO data, copper is present in the Cu2+ state in the calcined catalysts Cu/γ-Al2O3_1 and Cu-Pd/γ-Al2O3_1, but it is reduced to Cu+ when the reducing agent, CO, is adsorbed. Palladium in the calcined sample of Cu-Pd/γ-Al2O3_1 is present in two states - Pd2+ and Pd0 (due to the method of preparation of this sample). In the Cu-Pd/γ-Al2O3_2 catalyst, the state of palladium is Pd+. It was found that the metal content on the surface of the particles increases after reduction in hydrogen. The catalyst based on Cu/γ-Al2O3 had low activity, the addition of palladium led to an increase in the activity. Thus, in the presence of the PdCu/γ-Al2O3 catalyst, a 85% nitrobenzene conversion was achieved with a 100% aniline selectivity.

Pomogailo S.I. , Shuvalova E.V. , Knerel’man E.I. , Tkachenko O.P. , Chepaikin E.G. , Pomogailo D.A. , Kustov L.M.
A Pd-Cu Nanosized Catalyst Supported on γ-Al2O3 for Liquid-Phase Nitrobenzene Hydrogenation
Catalysis Letters. 2025. V.155. N9. 298 . DOI: 10.1007/s10562-025-05136-z WOS Scopus OpenAlex

Web of science:	WOS:001547912400001
Scopus:	2-s2.0-105012923508
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