Applied Surface Science, volume 594, pages 153473
Ceria-silica mesoporous catalysts for CO preferential oxidation in H2-rich stream: The effect of Ce:Si ratio and copper modification
Kaplin Igor Yu
1
,
Lokteva Ekaterina S
1
,
Kharlanov Andrey N
1
,
Kamaev Alexey O
1
,
Isaikina Oksana Ya
1
,
Maksimov Sergey V.
1
,
Golubina Elena V
1
Publication type: Journal Article
Publication date: 2022-08-01
Journal:
Applied Surface Science
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 6.7
ISSN: 01694332
Surfaces, Coatings and Films
General Chemistry
General Physics and Astronomy
Condensed Matter Physics
Surfaces and Interfaces
Abstract
• Pristine and copper-modified CeSiO x systems were prepared by a template method. • Ce:Si ratio strongly affect catalytic properties in CO-PROX. • CuO y /CeSiO x with Ce:Si = 4:1 exhibits the best catalytic properties in CO-PROX. • It comprises uniform fine CeO 2 NPs, Cu + and has improved reoxidation ability. In this work mesoporous CeO 2 -SiO 2 catalysts with the Ce:Si molar ratios of 1:1 and 4:1 were synthesized by template method and modified with copper to elucidate the role of copper-ceria and ceria-silica interactions in the catalyst efficiency in CO-PROX. The catalysts were characterized by SEM-EDS, AAS, XRD, TPR-H 2 , TEM, and spectroscopic methods (Raman, EPR and in situ DRIFT of adsorbed CO). The binary catalyst with the equimolar Ce:Si ratio demonstrated better catalytic performance in CO-PROX due to its favorable textural properties and strong ability to anion vacancy formation as confirmed by N 2 physisorption and Raman spectroscopy. CuO x /CeSiO y (Ce:Si = 4:1) demonstrated better low-temperature activity, CO 2 selectivity and stability than CuO x /CeSiO y (Ce:Si = 1:1) and both binary systems because of its unique structure, comprising fine CeO 2 particles with a narrow size distribution of 2–3 nm well dispersed on a large surface area, high concentration of the most active in CO oxidation Cu + sites, formed on CuO x -CeO 2 interfaces, and improved ability to surface reoxidation after reduction with the reagents resulted in the decreased Ce 3+ concentration. It was also stable in the presence of CO 2 and H 2 O in the reaction mixture. These properties would be difficult to achieve via template preparation methods without SiO 2 addition.
Citations by journals
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Catalysts
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2 publications, 16.67%
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Russian Journal of Physical Chemistry B
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Journal of Environmental Chemical Engineering
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1 publication, 8.33%
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1 publication, 8.33%
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1 publication, 8.33%
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1 publication, 8.33%
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1 publication, 8.33%
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1 publication, 8.33%
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1
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Citations by publishers
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4
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Elsevier
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4 publications, 33.33%
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3 publications, 25%
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Multidisciplinary Digital Publishing Institute (MDPI)
2 publications, 16.67%
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Springer Nature
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Springer Nature
1 publication, 8.33%
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Wiley
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Wiley
1 publication, 8.33%
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American Chemical Society (ACS)
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American Chemical Society (ACS)
1 publication, 8.33%
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- We do not take into account publications that without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Kaplin I. Yu. et al. Ceria-silica mesoporous catalysts for CO preferential oxidation in H2-rich stream: The effect of Ce:Si ratio and copper modification // Applied Surface Science. 2022. Vol. 594. p. 153473.
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Kaplin I. Yu., Lokteva E. S., Maslakov K., Tikhonov E. V., Kharlanov A. N., Fionov A. S., Kamaev A. O., Isaikina O. Ya., Maksimov S. V., Golubina E. V. Ceria-silica mesoporous catalysts for CO preferential oxidation in H2-rich stream: The effect of Ce:Si ratio and copper modification // Applied Surface Science. 2022. Vol. 594. p. 153473.
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TY - JOUR
DO - 10.1016/j.apsusc.2022.153473
UR - https://doi.org/10.1016%2Fj.apsusc.2022.153473
TI - Ceria-silica mesoporous catalysts for CO preferential oxidation in H2-rich stream: The effect of Ce:Si ratio and copper modification
T2 - Applied Surface Science
AU - Kaplin, Igor Yu
AU - Lokteva, Ekaterina S
AU - Maslakov, Konstantin
AU - Tikhonov, Evgeny V
AU - Kharlanov, Andrey N
AU - Fionov, Alexander Sergeevich
AU - Kamaev, Alexey O
AU - Isaikina, Oksana Ya
AU - Maksimov, Sergey V.
AU - Golubina, Elena V
PY - 2022
DA - 2022/08/01 00:00:00
PB - Elsevier
SP - 153473
VL - 594
SN - 0169-4332
ER -
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@article{2022_Kaplin,
author = {Igor Yu Kaplin and Ekaterina S Lokteva and Konstantin Maslakov and Evgeny V Tikhonov and Andrey N Kharlanov and Alexander Sergeevich Fionov and Alexey O Kamaev and Oksana Ya Isaikina and Sergey V. Maksimov and Elena V Golubina},
title = {Ceria-silica mesoporous catalysts for CO preferential oxidation in H2-rich stream: The effect of Ce:Si ratio and copper modification},
journal = {Applied Surface Science},
year = {2022},
volume = {594},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016%2Fj.apsusc.2022.153473},
pages = {153473},
doi = {10.1016/j.apsusc.2022.153473}
}