Boosting the activity of PdAg2/Al2O3 supported catalysts towards the selective acetylene hydrogenation by means of CO-induced segregation: A combined NAP XPS and mass-spectrometry study
P. V. Markov
1, 2
,
A V Rassolov
2
,
N S Smirnova
1, 2
,
Galina N. Baeva
2
,
R. Rameshan
3
,
A.Yu Stakheev
2
Publication type: Journal Article
Publication date: 2022-12-01
scimago Q1
wos Q1
SJR: 1.310
CiteScore: 13.4
Impact factor: 6.9
ISSN: 01694332, 18735584
Surfaces, Coatings and Films
General Chemistry
General Physics and Astronomy
Condensed Matter Physics
Surfaces and Interfaces
Abstract
• CO adsorption-induced s on supported PdAg 2 /Al 2 O 3 catalysts. • The segregation effect is appreciably stable and self-sustained even at the absence of CO. • Reductive treatment reverts the nanoparticle surface structure to the pristine state. • Catalytic properties of PdAg 2 /Al 2 O 3 towards the selective acetylene hydrogenation was investigated. • The CO-induced segregation led to improved activity with 100% selectivity under the conditions used. Selective hydrogenation (or semi-hydrogenation) of acetylene into ethylene is an important industrial process. The aim of the present work is thus to learn regularities governing the CO-induced segregation and elaborate practical procedures for tuning the surface structure of Pd-Ag nanoparticles to improve their catalytic performance towards the selective hydrogenation of acetylene to ethylene. Utilizing NAP XPS the CO adsorption-induced Pd atoms segregation in supported PdAg 2 /Al 2 O 3 catalysts already at room temperature has been shown. The surface enrichment with Pd further increases if the treatment temperature is increased up to 250°C. This specific configuration with a redistributed Pd/Ag surface atomic ratio is appreciably stable and self-sustained even at the absence of CO at moderately elevated temperatures. Nevertheless, a reductive treatment in hydrogen at 450°C reverts the nanoparticle surface structure to the pristine state. Catalytic properties of this peculiar CO-induced configuration of PdAg 2 /Al 2 O 3 towards the selective acetylene hydrogenation was investigated using a combination of NAP XPS and MS techniques. The PdAg 2 /Al 2 O 3 catalyst with the surface enriched with Pd due to the CO-induced segregation manifests improved activity with 100% selectivity under the conditions used. The results obtained clearly demonstrate that CO adsorption-induced segregation is a powerful tool that can be used to optimize the surface composition and catalytic performance of bimetallic nanoparticles.
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Bukhtiyarov A. V. et al. Boosting the activity of PdAg2/Al2O3 supported catalysts towards the selective acetylene hydrogenation by means of CO-induced segregation: A combined NAP XPS and mass-spectrometry study // Applied Surface Science. 2022. Vol. 604. p. 154497.
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Bukhtiyarov A. V., Panafidin M. A., Prosvirin I. P., Mashkovsky I. S., Markov P. V., Rassolov A. V., Smirnova N. S., Baeva G. N., Rameshan C., Rameshan R., Zubavichus Y. V., Bukhtiyarov V. I., Stakheev A. Boosting the activity of PdAg2/Al2O3 supported catalysts towards the selective acetylene hydrogenation by means of CO-induced segregation: A combined NAP XPS and mass-spectrometry study // Applied Surface Science. 2022. Vol. 604. p. 154497.
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TY - JOUR
DO - 10.1016/j.apsusc.2022.154497
UR - https://doi.org/10.1016/j.apsusc.2022.154497
TI - Boosting the activity of PdAg2/Al2O3 supported catalysts towards the selective acetylene hydrogenation by means of CO-induced segregation: A combined NAP XPS and mass-spectrometry study
T2 - Applied Surface Science
AU - Bukhtiyarov, Andrey V
AU - Panafidin, Maxim A
AU - Prosvirin, Igor P.
AU - Mashkovsky, Igor S
AU - Markov, P. V.
AU - Rassolov, A V
AU - Smirnova, N S
AU - Baeva, Galina N.
AU - Rameshan, Christoph
AU - Rameshan, R.
AU - Zubavichus, Yan V.
AU - Bukhtiyarov, V. I.
AU - Stakheev, A.Yu
PY - 2022
DA - 2022/12/01
PB - Elsevier
SP - 154497
VL - 604
SN - 0169-4332
SN - 1873-5584
ER -
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@article{2022_Bukhtiyarov,
author = {Andrey V Bukhtiyarov and Maxim A Panafidin and Igor P. Prosvirin and Igor S Mashkovsky and P. V. Markov and A V Rassolov and N S Smirnova and Galina N. Baeva and Christoph Rameshan and R. Rameshan and Yan V. Zubavichus and V. I. Bukhtiyarov and A.Yu Stakheev},
title = {Boosting the activity of PdAg2/Al2O3 supported catalysts towards the selective acetylene hydrogenation by means of CO-induced segregation: A combined NAP XPS and mass-spectrometry study},
journal = {Applied Surface Science},
year = {2022},
volume = {604},
publisher = {Elsevier},
month = {dec},
url = {https://doi.org/10.1016/j.apsusc.2022.154497},
pages = {154497},
doi = {10.1016/j.apsusc.2022.154497}
}