Enhanced Thermal Stability of Pd/Ce–Sn–O Catalysts for CO Oxidation Prepared by Plasma-Arc Synthesis Full article
| Conference |
Recent Advances in Plasma Catalysis : International Symposium on Plasmas for Catalyses and Energy Materials 29 Jun - 2 Jul 2016 , Tianjin |
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| Journal |
Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028 |
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| Output data | Year: 2017, Volume: 60, Number: 12-14, Pages: 898-913 Pages count : 16 DOI: 10.1007/s11244-017-0755-7 | ||||||||
| Tags | CO oxidation, Composite catalysts, Pd/CeO2, Plasma-arc sputtering | ||||||||
| Authors |
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| Affiliations |
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Funding (3)
| 1 | Russian Foundation for Basic Research | 14-03-01088 |
| 2 | Federal Agency for Scientific Organizations | 0303-2016-0003 |
| 3 | Skolkovo Foundation | 3 от 25.12.2014 |
Abstract:
The plasma-arc (PA) method was applied for the highly efficient synthesis of Pd/Ce–Sn–O catalysts for CO oxidation. Using the PA sputtering of a graphite electrode together with Pd, Ce and Sn metallic components in inert atmosphere, a PdCeSnC composite was obtained. After the subsequent calcination in oxygen over the temperature range of 600–1000 °C, the initial composites were transformed into active catalysts of CO oxidation at low temperatures (LTO CO). Catalytic testing showed that these PA-prepared Pd/Ce–Sn–O catalysts were characterized by unusually high thermal stability. The catalysts demonstrated the excellent LTO CO performance after calcination at 1000 °C. According to the XRD and HRTEM observations, the Pd/Ce–Sn–O catalysts can be described as heterogeneous structures consisting of small CeO2 and SnO2 particles that interact with each other, forming extended grain boundaries and a composite structure. The TPR-CO and XPS methods detected highly dispersed Pd species in the active catalysts, namely Pd2+ in the lattice of ceria (a Pd-ceria solid solution) and the PdOx clusters on the surface. Deactivation of the Pd/Ce–Sn–O is governed by decomposition of the Pd-ceria solid solution accompanied by the sintering of the PdOx clusters and formation of the metallic and oxide palladium nanoparticles. Oxygen species with high mobility in the Pd/Ce–Sn–O catalyst were detected by a TPR-CO method. The amount of the highly mobile oxygen species is in five times higher for the Pd/Ce–Sn–O catalyst then for the Pd/CeO2 sample. Promising perspectives of the plasma-arc application for catalyst the synthesis of with improved properties are discussed.
Cite:
Kardash T.Y.
, Slavinskaya E.M.
, Gulyaev R.V.
, Zaikovskii A.V.
, Novopashin S.A.
, Boronin A.I.
Enhanced Thermal Stability of Pd/Ce–Sn–O Catalysts for CO Oxidation Prepared by Plasma-Arc Synthesis
Topics in Catalysis. 2017. V.60. N12-14. P.898-913. DOI: 10.1007/s11244-017-0755-7 WOS Scopus РИНЦ ANCAN OpenAlex
Enhanced Thermal Stability of Pd/Ce–Sn–O Catalysts for CO Oxidation Prepared by Plasma-Arc Synthesis
Topics in Catalysis. 2017. V.60. N12-14. P.898-913. DOI: 10.1007/s11244-017-0755-7 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Published online: | Apr 12, 2017 |
| Published print: | Aug 1, 2017 |
Identifiers:
| Web of science: | WOS:000407858000011 |
| Scopus: | 2-s2.0-85017434590 |
| Elibrary: | 31042625 |
| Chemical Abstracts: | 2017:598575 |
| Chemical Abstracts (print): | 167:250522 |
| OpenAlex: | W2605669200 |