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Stabilization of Active Sites in Alloyed Pd–Rh Catalysts on γ-Al2O3 Support Full article

Conference 7th World Congress on Oxidation Catalysis
09-12 Jun 2013 , Saint Louis
Journal Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308
Output data Year: 2014, Volume: 238, Pages: 80-86 Pages count : 7 DOI: 10.1016/j.cattod.2014.02.056
Tags EPR, Exhaust gases neutralization, Photoluminescence, Prompt thermal aging, Rhodium-palladium alloy, Three-way catalysts
Authors Vedyagin Aleksey A. 1,2 , Volodin Alexander M. 1 , Stoyanovskii Vladimir O. 1 , Kenzhin Roman M. 1 , Slavinskaya Elena M. 1 , Mishakov Ilya V. 1,2 , Plyusnin Pavel E. 3,4 , Shubin Yury V. 3,4
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia
2 Novosibirsk State Technical University, Novosibirsk, Russia
3 Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russia
4 Novosibirsk State University, Novosibirsk, Russia

Funding (3)

1 Federal Agency for Scientific Organizations V.45.3.2.
2 Russian Foundation for Basic Research 13-03-00988
3 Russian Foundation for Basic Research 14-03-00411

Abstract: Active components for three-way catalysts containing alloyed Pd–Rh particles with the concentration of the components 0.12 and 0.08 wt.%, respectively, were synthesized and studied. The properties of these materials were compared with those of supported catalysts containing one or two precious metals (PM) prepared by mechanical mixing of the components with the same concentrations of PM. The stability of the samples was estimated by in situ prompt thermal aging (PTA) procedure. Photoluminescence (PL) and electron paramagnetic resonance (EPR) were used to show the importance of intrinsic sites of the support in stabilization of single-metal and alloyed Pd-containing clusters with high catalytic activity in CO oxidation. Substantial mutual effect of Pd and Rh in the alloyed particles was revealed. It prevents Pd-containing particles from sintering and hinders diffusion of Rh3+ ions into the bulk of the support at high temperatures. The spin probe technique was used to demonstrate that the alloy formation permits one to improve significantly the catalyst stability to reduction.
Cite: Vedyagin A.A. , Volodin A.M. , Stoyanovskii V.O. , Kenzhin R.M. , Slavinskaya E.M. , Mishakov I.V. , Plyusnin P.E. , Shubin Y.V.
Stabilization of Active Sites in Alloyed Pd–Rh Catalysts on γ-Al2O3 Support
Catalysis Today. 2014. V.238. P.80-86. DOI: 10.1016/j.cattod.2014.02.056 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
Submitted: Nov 27, 2013
Accepted: Feb 27, 2014
Published online: Apr 16, 2014
Published print: Dec 1, 2014
Identifiers:
Web of science: WOS:000341878600012
Scopus: 2-s2.0-84907711824
Elibrary: 23992977
Chemical Abstracts: 2014:641613
Chemical Abstracts (print): 161:540371
OpenAlex: W2034719063
Citing:
DB Citing
Web of science 52
Scopus 52
Elibrary 55
OpenAlex 53
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