Liquid-Phase Acetylene Hydrogenation over Ag-Modified Pd/Sibunit Catalysts: Effect of Pd to Ag Molar Ratio | Sciact - CRIS-system of Boreskov Institute of Catalysis

Liquid-Phase Acetylene Hydrogenation over Ag-Modified Pd/Sibunit Catalysts: Effect of Pd to Ag Molar Ratio Full article

Journal

Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875

Output data

Year: 2020, Volume: 600, Article number : 117627, Pages count : 9 DOI: 10.1016/j.apcata.2020.117627

Tags

Acetylene hydrogenation; Modification with Ag; Nanoparticles; Palladium catalyst; Structural changes

Authors

Glyzdova Daria V. ¹ , Afonasenko Tatyana N. ¹ , Khramov Evgeny V. ² , Leont'eva Natalya N. ¹ , Prosvirin Igor P. ³ , Bukhtiyarov Andrey V. ³ , Shlyapin Dmitry A. ¹

Affiliations

1	Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis, Neftezavodskaya St., 54, Omsk, 644040, Russian Federation
2	National Research Center “Kurchatov Institute”, Kurchatov Square, 1, Moscow, 123182, Russian Federation
3	Federal Research Center Boreskov Institute of Catalysis, 5 Lavrentiev Ave., Novosibirsk, 630090, Russian Federation

Funding (1)

Federal Agency for Scientific Organizations

V.46.2.5. (АААА-А17-117021450096-8)

A series of bimetallic Pd–Ag catalysts supported on the carbon material Sibunit was synthesized for selective liquid-phase acetylene hydrogenation. Using XRD and EXAFS it was shown that palladium and silver in the 0.5% Pd–Ag/Sibunit can form bimetallic PdxAg(1− x ) nanoparticles with the composition depending on the Pd:Ag ratio. The active component of Pd–Ag(1:0.25)/Sibunit, Pd–Ag(1:1)/Sibunit and Pd–Ag(1:4)/Sibunit is represented by the particles of Pd0.74Ag0.26, Pd0.60Ag0.40 and Pd0.41Ag0.59 nanoalloys, respectively. An increase of the quantity of silver decreases the catalyst activity. The XPS study revealed that this phenomenon is caused by a decrease in the surface concentration of palladium (geometrical effect) and an increase in the degree of palladium electronic modification with silver (electronic effect). The latter exerts a beneficial effect on the reaction selectivity: as the Pd:Ag molar ratio is raised to 1:2, selectivity to ethylene increases to 81% (X > 97%), which exceeds 2.7-fold the selectivity of Pd/Sibunit. © 2020 Elsevier B.V.

Glyzdova D.V. , Afonasenko T.N. , Khramov E.V. , Leont'eva N.N. , Prosvirin I.P. , Bukhtiyarov A.V. , Shlyapin D.A.
Liquid-Phase Acetylene Hydrogenation over Ag-Modified Pd/Sibunit Catalysts: Effect of Pd to Ag Molar Ratio
Applied Catalysis A: General. 2020. V.600. 117627 :1-9. DOI: 10.1016/j.apcata.2020.117627 WOS Scopus РИНЦ AN OpenAlex publication_identifier_short.sciact_ihcp_identifier_type

Submitted:	Mar 3, 2020
Accepted:	May 9, 2020
Published online:	May 15, 2020
Published print:	Jun 25, 2020

Web of science:	WOS:000539110200008
Scopus:	2-s2.0-85085528899
Elibrary:	43298873
Chemical Abstracts:	2020:1053926
OpenAlex:	W3025106281
publication_identifier.sciact_ihcp_identifier_type:	2831

DB	Citing
Scopus	45
Web of science	40
Elibrary	43
OpenAlex	48