Thermally Induced Structural Evolution of Palladium-Ceria Catalysts. Implication for CO Oxidation Full article
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ChemCatChem
ISSN: 1867-3880 , E-ISSN: 1867-3899 |
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| Output data | Year: 2019, Volume: 11, Number: 15, Pages: 3505–3521 Pages count : 17 DOI: 10.1002/cctc.201900752 | ||
| Tags | cerium oxide; CO oxidation; Nanoparticles; Palladium; Structure-activity relationships | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Federal Agency for Scientific Organizations | 0303-2016-0003 |
Abstract:
Structural transformations in Pd/CeO2 catalysts during their calcination over a wide temperature range (450-1200 °C) were studied with structural, spectroscopic, and kinetic methods (XRD, TEM, XPS, and TPR). Two synthetic methods were applied: coprecipitation and incipient wetness impregnation. The impregnation synthesis produced the best low-temperature oxidation of CO (LTO CO) for the catalysts that were calcined at 450–900 °C. Their high LTO CO activities could be attributed to the formation of reactive surface clusters at the PdO−CeO2 interface. The coprecipitation synthesis produced a homogeneous PdxCe1-xO2-δ solid solution with no Pd nanostructured particles. Decomposition of the solid solution phase occurred at 800–850 °C and resulted in the formation of unusual Pd species, i. e., Pd(Ce)Ox superstructures and agglomerates consisting of 2 nm PdO particles. Further calcination of the catalysts resulted in the formation of mixed Pd0−PdO−CeO2 nanoparticles with a heterophase morphology that provided high thermal stability. These catalysts demonstrated capability for CO oxidation at temperatures below 100 °C after calcination at 1200 °C. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Cite:
Stonkus O.A.
, Kardash T.Y.
, Slavinskaya E.M.
, Zaikovskii V.I.
, Boronin A.I.
Thermally Induced Structural Evolution of Palladium-Ceria Catalysts. Implication for CO Oxidation
ChemCatChem. 2019. V.11. N15. P.3505–3521. DOI: 10.1002/cctc.201900752 WOS Scopus РИНЦ AN OpenAlex
Thermally Induced Structural Evolution of Palladium-Ceria Catalysts. Implication for CO Oxidation
ChemCatChem. 2019. V.11. N15. P.3505–3521. DOI: 10.1002/cctc.201900752 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Apr 24, 2019 |
| Accepted: | Jun 5, 2019 |
| Published online: | Jul 9, 2019 |
| Published print: | Aug 9, 2019 |
Identifiers:
| Web of science: | WOS:000480290100019 |
| Scopus: | 2-s2.0-85068511759 |
| Elibrary: | 41635411 |
| Chemical Abstracts: | 2019:1329803 |
| OpenAlex: | W2950034557 |