Low-Temperature Activity of Pd/CeO2 Catalysts: Mechanism of CO Interaction and Mathematical Modelling of TPR-CO Kinetic Data Full article
| Journal |
Chemical Engineering Science
ISSN: 0009-2509 , E-ISSN: 1873-4405 |
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| Output data | Year: 2021, Volume: 244, Article number : 116812, Pages count : 12 DOI: 10.1016/j.ces.2021.116812 | ||
| Tags | CO oxidation; Kinetic simulation; Mathematical modelling; Mechanism of reaction; TPR-CO | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0003 |
Abstract:
We studied the kinetic of CO interaction with Pd/CeO2 catalysts during temperature programmed reactions (TPR-CO). Increasing of the calcination temperature leads to the changes of palladium states in the catalysts structure from solid solution to surface clusters and nanoparticles. Kinetic simulation showed that surface clusters are the most active species at temperatures below 100 °C. The blurry CO2 evolution in the temperature range 100–250 °C is determined by the effect of bulk-surface transfer of lattice oxygen to the surface clusters. The separate sharp peak at 200 °C was simulated to be attributed to the reduction of the nanoparticles. In the high-temperature range of TPR-CO the reduced active centres on the surface of ceria are supplied with oxygen from the ceria bulk. Upon increasing the calcination temperature, the concentration of active oxygen in the ceria lattice taking part in the reaction with CO increases, and the catalyst is more reduced. © 2021 Elsevier Ltd
Cite:
Lashina E.A.
, Slavinskaya E.M.
, Boronin A.I.
Low-Temperature Activity of Pd/CeO2 Catalysts: Mechanism of CO Interaction and Mathematical Modelling of TPR-CO Kinetic Data
Chemical Engineering Science. 2021. V.244. 116812 :1-12. DOI: 10.1016/j.ces.2021.116812 WOS Scopus РИНЦ AN OpenAlex
Low-Temperature Activity of Pd/CeO2 Catalysts: Mechanism of CO Interaction and Mathematical Modelling of TPR-CO Kinetic Data
Chemical Engineering Science. 2021. V.244. 116812 :1-12. DOI: 10.1016/j.ces.2021.116812 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Mar 13, 2021 |
| Accepted: | May 27, 2021 |
| Published online: | May 31, 2021 |
| Published print: | Nov 23, 2021 |
Identifiers:
| Web of science: | WOS:000672593300006 |
| Scopus: | 2-s2.0-85107710064 |
| Elibrary: | 46880895 |
| Chemical Abstracts: | 2021:1309275 |
| OpenAlex: | W3171047282 |