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Interaction of Pd and Rh with ZrCeYLaO2 Support During Thermal Aging and Its Effect on the CO Oxidation Activity Full article

Journal Reaction Kinetics, Mechanisms and Catalysis
ISSN: 1878-5190 , E-ISSN: 1878-5204
Output data Year: 2020, Volume: 129, Number: 1, Pages: 117-133 Pages count : 17 DOI: 10.1007/s11144-019-01704-8
Tags Palladium; rhodium; ceria-zirconia support; metal-support interaction; thermal stability; bimetallic Pd-Rh alloys
Authors Vedyagin Aleksey A. 1 , Alikin Evgeny A. 2 , Kenzhin Roman M. 1 , Tashlanov Mikhail Yu. 2,3 , Stoyanovskii Vladimir O. 1 , Plyusnin Pavel E. 3,4 , Shubin Yury V. 3,4 , Mishakov Ilya V. 1,3
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Novosibirsk
2 Ecoaliiance LLC
3 National Research Novosibirsk State University
4 Nikolaev Institute of Inorganic Chemistry SB RAS

Funding (1)

1 The Ministry of Education and Science of the Russian Federation 14.581.21.0028 (RFMEFI58117X0028)

Abstract: A commercial ceria-zirconia composition modified with yttrium and lanthanum oxides was studied as a support for palladium- and rhodium-containing three-way catalysts. The most attention was paid to an interaction of the supported active metals with the support under high-temperature conditions. It was found that both the metals affect noticeably the porous structure of the support and the loading of metal plays a role in this process. Moreover, oxygen storage capacity of the oxide composition was also influenced by the supported metals. Hydrothermal aging of the metal-loaded samples has decreased the oxygen storage capacity values in more than 2 times. The thermal stability of the monometallic samples was compared with bimetallic Pd-Rh catalysts prepared using a “single-source precursor” approach. The experiments were performed under prompt thermal aging conditions. It was found that monometallic Pd-only samples and bimetallic Pd-Rh samples exhibit excellent stability, while monometallic Rh-only catalysts undergo deactivation being heated up to 800 °C due to diffusion of rhodium into the bulk of the support. All the samples were additionally characterized by a diffuse reflectance UV-vis spectroscopy and a testing reaction of ethane hydrogenolysis. According to the results obtained, the character of the metal-support interaction was found to be strongly affected by the catalyst’s composition. Application of the bimetallic Pd-Rh particles of alloyed type was shown to result in the preferable location of the active components on the support’s surface, thus facilitating high activity and stability of the catalyst.
Cite: Vedyagin A.A. , Alikin E.A. , Kenzhin R.M. , Tashlanov M.Y. , Stoyanovskii V.O. , Plyusnin P.E. , Shubin Y.V. , Mishakov I.V.
Interaction of Pd and Rh with ZrCeYLaO2 Support During Thermal Aging and Its Effect on the CO Oxidation Activity
Reaction Kinetics, Mechanisms and Catalysis. 2020. V.129. N1. P.117-133. DOI: 10.1007/s11144-019-01704-8 WOS Scopus РИНЦ AN OpenAlex
Dates:
Submitted: Oct 15, 2019
Accepted: Dec 9, 2019
Published print: Jan 2, 2020
Published online: Feb 1, 2020
Identifiers:
Web of science: WOS:000505344200002
Scopus: 2-s2.0-85077262380
Elibrary: 43219395
Chemical Abstracts: 2020:26589
OpenAlex: W2997123711
Citing:
DB Citing
Scopus 13
Web of science 12
Elibrary 14
OpenAlex 12
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