Deliberate control of the structure-specific active sites in PdIn bimetallic catalysts using adsorbate induced segregation effects

Deliberate control of the structure-specific active sites in PdIn bimetallic catalysts using adsorbate induced segregation effects Full article

Journal

Applied Surface Science
ISSN: 1873-5584 , E-ISSN: 0169-4332

Output data

Year: 2023, Volume: 608, Article number : 155086, Pages count : DOI: 10.1016/j.apsusc.2022.155086

Authors

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

Affiliations

1	Boreskov Institute of Catalysis, Lavrentieva ave. 5, 630090 Novosibirsk, Russian Federation
2	N. D. Zelinsky Institute of Organic Chemistry, 119991 Moscow, Russian Federation
3	Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/BC/01, 1060 Vienna, Austria

A bimetallic PdIn/Al2O3 catalyst has been prepared, characterized by diffuse reflectance infrared Fourier transform spectroscopy of adsorbed CO (DRIFTS CO), X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HRTEM), and tested towards the liquid-phase diphenylacetylene hydrogenation at room temperature. It was shown that the freshly reduced catalyst contains PdIn intermetallic nanoparticles that demonstrate excellent selectivity in the diphenylacetylene selective hydrogenation to diphenylethylene ∼ 98 % at 90 % conversion. An oxidative treatment of the catalyst induces preferential oxidative leaching of the In component from the intermetallic compound, modifying the catalyst active sites structure to the state with a high hydrogenation activity but poor stilbene selectivity. The changes upon the redox treatments are essentially reversible and reproducible. This effect can be intentionally used to get an optimum balance between activity and selectivity of the catalyst.

Bukhtiyarov A.V. , Panafidin M.A. , Prosvirin I.P. , Smirnova N.S. , Markov P.V. , Baeva G.N. , Mashkovsky I.S. , Bragina G.O. , Rameshan C. , Gerasimov E.Y. , Zubavichus Y.V. , Bukhtiyarov V.I. , Stakheev A.Y.
Deliberate control of the structure-specific active sites in PdIn bimetallic catalysts using adsorbate induced segregation effects
Applied Surface Science. 2023. V.608. 155086 . DOI: 10.1016/j.apsusc.2022.155086 WOS Scopus OpenAlex

Web of science:	WOS:000876016100006
Scopus:	2-s2.0-85139327226
OpenAlex:	W4300862636

DB	Citing
OpenAlex	14
Scopus	13
Web of science	13