Catalytic Performance of a Single Atom Pd1Ag10/Al2O3 Catalyst for the Selective Hydrogenation of Acetylene: The Role of CO-Induced Segregation | Sciact - CRIS-system of Boreskov Institute of Catalysis

Catalytic Performance of a Single Atom Pd1Ag10/Al2O3 Catalyst for the Selective Hydrogenation of Acetylene: The Role of CO-Induced Segregation Full article

Journal

Applied Surface Science
ISSN: 0169-4332

Output data

Year: 2025, Volume: 681, Article number : 161516, Pages count : 10 DOI: 10.1016/j.apsusc.2024.161516

Tags

Pd-Ag nanoparticles; Single atom alloy; Adsorption-induced segregation; XPS; DRIFTS-CO; Selective hydrogenation

Authors

Mashkovsky I.S. ¹ , Bukhtiyarov A.V. ² , Markov P.V. ¹ , Bragina G.O. ¹ , Baeva G.N. ¹ , Smirnova N.S. ¹ , Panafidin M.A. ² , Chetyrin I.A. ² , Gerasimov E.Yu. ³ , Zubavichus Y.V. ² , Stakheev A.Yu. ¹

Affiliations

1	N. D. Zelinsky Institute of Organic Chemistry, Leninsky Prosp., 47, 119991 Moscow, Russian Federation
2	Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis, Nikolsky Prosp., 1, 630559 Kol’tsovo, Russian Federation
3	Boreskov Institute of Catalysis, Acad. Lavrentiev Prosp., 5, 630090 Novosibirsk, Russian Federation

Funding (2)

1	Russian Science Foundation	23-13-00301
2	Ministry of Science and Higher Education of the Russian Federation	FWUR-2024-0042

The single-atom Pd catalysts based on silver-rich bimetallic compositions are known for their extremely high ethylene selectivity in the acetylene hydrogenation reaction; however, their activity is noticeably lower than that of traditional monometallic Pd catalysts. The aim of the work was to apply a method of CO-induced segregation to increase the concentration of single atom Pd1 sites on the surface of Pd1Ag10/Al2O3 catalyst without noticeable formation of multiatomic Pdn (n ≥ 2) ensembles. It has been experimentally established by DRIFTS-CO and XPS methods that the effect of 30 vol% CO exposure temperature on the increase of surface Pd1 sites concentration in the range of 50 to 350 °C has a volcano-like dependence with a maximum at ∼ 200–250 °C. The catalytic tests show a considerable enhancement in activity for samples treated in CO at 200–250 °C (the temperature of 100 % acetylene conversion is reduced by ∼ 30 °C), while the C2H4 selectivity was similar for both freshly reduced and CO-treated catalysts. These results demonstrate the use of CO-induced segregation as a promising method for the controlled increase in the concentration of isolated Pd1 sites to improve the activity of silver-rich palladium catalyst without compromising its selectivity.

Mashkovsky I.S. , Bukhtiyarov A.V. , Markov P.V. , Bragina G.O. , Baeva G.N. , Smirnova N.S. , Panafidin M.A. , Chetyrin I.A. , Gerasimov E.Y. , Zubavichus Y.V. , Stakheev A.Y.
Catalytic Performance of a Single Atom Pd1Ag10/Al2O3 Catalyst for the Selective Hydrogenation of Acetylene: The Role of CO-Induced Segregation
Applied Surface Science. 2025. V.681. 161516 :1-10. DOI: 10.1016/j.apsusc.2024.161516 WOS Scopus OpenAlex

Submitted:	Aug 1, 2024
Accepted:	Oct 11, 2024
Published online:	Oct 12, 2024
Published print:	Feb 1, 2025

Web of science:	WOS:001340395000001
Scopus:	2-s2.0-85206460174
OpenAlex:	W4403348623

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