Effect of La Addition on the Performance of Three-Way Catalysts Containing Palladium and Rhodium Full article
| Conference |
XI International Conference Mechanisms of Catalytic Reactions 07-11 Oct 2019 , Сочи |
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| Journal |
Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028 |
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| Output data | Year: 2020, Volume: 63, Number: 1-2, Pages: 152–165 Pages count : 14 DOI: 10.1007/s11244-019-01213-x | ||||||||
| Tags | Three-way catalysts; bimetallic Pd-Rh alloys; La-doped alumina support; metal-support interaction; thermal stability | ||||||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | The Ministry of Education and Science of the Russian Federation | 14.581.21.0028 (RFMEFI58117X0028) |
Abstract:
Three-way catalysts containing palladium and/or rhodium were prepared using γAl2O3 doped with lanthanum oxide as a support. All the samples were obtained by an incipient wetness impregnation of the support with an aqueous solution of nitrates. In order to investigate the metal-support interaction, the support was additionally calcined at 800 °C before the impregnation procedure. Characterization of the support thermally treated within a range of 600-1000 °C by low-temperature nitrogen absorption, X-ray diffraction analysis, and electron paramagnetic resonance spectroscopy has revealed that the treatment conditions strongly affect the textural properties, the phase composition and the concentration of electron-donor sites on the surface of the support. Deposition of metals by the impregnation of initial support with a joint solution of Pd and Rh nitrates has led to formation of small Pd-Rh alloyed nanoparticles with strong metal-metal interaction, which was confirmed by a testing reaction of ethane hydrogenolysis. No alloy formation was observed in the case of mechanical mixing of the separately prepared Pd-only and Rh-only catalysts as well as in the case of preliminary calcined support impregnated with joint solution of Pd and Rh nitrates. Bimetallic Pd-Rh catalyst of alloyed type was shown to be the most promising in terms of catalytic performance and thermal stability.
Cite:
Vedyagin A.A.
, Kenzhin R.M.
, Tashlanov M.Y.
, Alikin E.A.
, Stoyanovskii V.O.
, Plyusnin P.E.
, Shubin Y.V.
, Mishakov I.V.
, Smirnov M.Y.
, Kalinkin A.V.
, Bukhtiyarov V.I.
Effect of La Addition on the Performance of Three-Way Catalysts Containing Palladium and Rhodium
Topics in Catalysis. 2020. V.63. N1-2. P.152–165. DOI: 10.1007/s11244-019-01213-x WOS Scopus РИНЦ AN OpenAlex
Effect of La Addition on the Performance of Three-Way Catalysts Containing Palladium and Rhodium
Topics in Catalysis. 2020. V.63. N1-2. P.152–165. DOI: 10.1007/s11244-019-01213-x WOS Scopus РИНЦ AN OpenAlex
Dates:
| Published online: | Jan 2, 2020 |
| Published print: | Mar 1, 2020 |
Identifiers:
| Web of science: | WOS:000505376300002 |
| Scopus: | 2-s2.0-85077247301 |
| Elibrary: | 43225699 |
| Chemical Abstracts: | 2020:35265 |
| OpenAlex: | W2998335992 |