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Properties of PdAg/Al2O3 Egg–Shell Single-Atom Catalysts in Front-End Hydrogenation of Acetylene Full article

Journal Petroleum Chemistry
ISSN: 0965-5441 , E-ISSN: 1555-6239
Output data Year: 2024, Volume: 64, Number: 9, Pages: 1159-1168 Pages count : 10 DOI: 10.1134/s0965544124050165
Authors Mashkovsky I.S. 1 , Markov P.V. 1 , Baeva G.N. 1 , Smirnova N.S. 1 , Vaulina A.E. 2,1 , Mel’nikov D.P. 3 , Stakheev A.Yu. 1
Affiliations
1 N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia
2 D.I. Mendeleev University of Chemical Technology, 125047, Moscow, Russia
3 I.M. Gubkin Russian State University of Oil and Gas (National Research University), 119991, Moscow, Russia

Abstract: Two samples of PdAg/Al2O3 egg–shell single-atom catalysts, with Ag/Pd ratios of 1 : 1 and 3 : 1, were synthesized and characterized by TEM, XPS, and DRIFTS-CO methods. The formation of bimetallic PdAg alloy nanoparticles with single-atom Pd1 active sites was demonstrated. Furthermore, a physicochemical characterization showed a egg–shell distribution of the active component. The catalytic performance of the samples was tested in front-end selective hydrogenation of acetylene. The H2/C2H2 ratio in the model mixture was varied from 20 to 60. Under front-end acetylene hydrogenation conditions, the highest ethylene selectivity (about 87 at 90% acetylene conversion) was achieved in the presence of the Pd1Ag3/Al2O3 catalyst at H2/C2H2 = 20. Finally, it was shown that, unlike the monometallic Pd catalyst, the Ag-promoted catalysts were completely free of any local thermal runaway effect.
Cite: Mashkovsky I.S. , Markov P.V. , Baeva G.N. , Smirnova N.S. , Vaulina A.E. , Mel’nikov D.P. , Stakheev A.Y.
Properties of PdAg/Al2O3 Egg–Shell Single-Atom Catalysts in Front-End Hydrogenation of Acetylene
Petroleum Chemistry. 2024. V.64. N9. P.1159-1168. DOI: 10.1134/s0965544124050165 WOS Scopus OpenAlex
Identifiers:
Web of science: WOS:001314825100001
Scopus: 2-s2.0-85204180466
OpenAlex: W4402603367
Citing:
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OpenAlex 4
Scopus 3
Web of science 2
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