Liquid-phase acetylene hydrogenation over Ag-modified Pd/Sibunit catalysts: Effect of Pd to Ag molar ratio
Daria V Glyzdova
1
,
Natalya N. Leont'eva
1
,
Тип публикации: Journal Article
Дата публикации: 2020-06-01
scimago Q2
wos Q2
БС1
SJR: 1.000
CiteScore: 8.6
Impact factor: 4.8
ISSN: 0926860X, 18733875
Catalysis
Process Chemistry and Technology
Краткое описание
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.
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Glyzdova D. V. et al. Liquid-phase acetylene hydrogenation over Ag-modified Pd/Sibunit catalysts: Effect of Pd to Ag molar ratio // Applied Catalysis A: General. 2020. Vol. 600. p. 117627.
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Glyzdova D. V., Leont'eva N. N., Bukhtiyarov A. V., Shlyapin D. A., Afonasenko T. N., Khramov E. V., Prosvirin I. P. Liquid-phase acetylene hydrogenation over Ag-modified Pd/Sibunit catalysts: Effect of Pd to Ag molar ratio // Applied Catalysis A: General. 2020. Vol. 600. p. 117627.
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TY - JOUR
DO - 10.1016/j.apcata.2020.117627
UR - https://doi.org/10.1016/j.apcata.2020.117627
TI - Liquid-phase acetylene hydrogenation over Ag-modified Pd/Sibunit catalysts: Effect of Pd to Ag molar ratio
T2 - Applied Catalysis A: General
AU - Glyzdova, Daria V
AU - Leont'eva, Natalya N.
AU - Bukhtiyarov, Andrey V
AU - Shlyapin, Dmitry A.
AU - Afonasenko, Tatyana N.
AU - Khramov, Evgeny V.
AU - Prosvirin, Igor P.
PY - 2020
DA - 2020/06/01
PB - Elsevier
SP - 117627
VL - 600
SN - 0926-860X
SN - 1873-3875
ER -
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@article{2020_Glyzdova,
author = {Daria V Glyzdova and Natalya N. Leont'eva and Andrey V Bukhtiyarov and Dmitry A. Shlyapin and Tatyana N. Afonasenko and Evgeny V. Khramov and Igor P. Prosvirin},
title = {Liquid-phase acetylene hydrogenation over Ag-modified Pd/Sibunit catalysts: Effect of Pd to Ag molar ratio},
journal = {Applied Catalysis A: General},
year = {2020},
volume = {600},
publisher = {Elsevier},
month = {jun},
url = {https://doi.org/10.1016/j.apcata.2020.117627},
pages = {117627},
doi = {10.1016/j.apcata.2020.117627}
}