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Low-Temperature CO Oxidation by Pd/CeO2 Catalysts Synthesized Using the Coprecipitation Method Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Journal Applied Catalysis B: Environmental
ISSN: 0926-3373 , E-ISSN: 1873-3883
Output data Year: 2015, Volume: 166-167, Pages: 91-103 Pages count : 16 DOI: 10.1016/j.apcatb.2014.11.015
Tags Coprecipitation, Low-temperature CO oxidation, Pd/CeO2, TEM, XPS
Authors Slavinskaya E.M. 1,3 , Gulyaev R.V. 1,3 , Zadesenets A.V. 2,3 , Stonkus O.A. 1,3 , Zaikovskii V.I. 1,3 , Shubin Yu.V. 2,3 , Korenev S.V. 2,3 , Boronin A.I. 1,3
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Prosp. Akad. Lavrentieva 5, Novosibirsk 630090, Russia
2 Nikolaev Institute of Inorganic Chemistry SB RAS, Prosp. Akad. Lavrentieva 3, Novosibirsk 630090, Russia
3 Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russia

Funding (2)

1 Президиум СО РАН 124
2 The Ministry of Education and Science of the Russian Federation 074-U01

Abstract: Pd/CeO2 catalysts synthesized using the coprecipitation method under a wide range of palladium loading and calcination temperatures were investigated in this study. Structural (XRD, TEM), spectroscopic (XPS) and kinetic (TPR-CO) methods were used to investigate the morphological and structural forms of the catalysts and identify the states of palladium as the active component on the CeO2 surface and in its bulk. It was found that the synthesis and subsequent calcination at 450 °C resulted in the formation of two main types of the catalyst components: PdO nanoparticles and PdxCe1−xO2−δ solid solution. Application of HRTEM allowed to establish the formation of aggregates where ceria or PdxCe1−xO2−δ nanoparticles were located around PdO nanoparticles. A subsequent calcination process resulted in partial dissolution of PdO nanoparticles in ceria lattice and formation of the surface compounds of palladium and ceria, PdOx(s)/Pd–O–Ce(s), which contain high reactive oxygen according to the TPR-CO data. Based on the XPS and TPR-CO data the catalytic activity at low temperatures (<100 °C) was determined by a combination of both palladium surface structures PdOx(s)/Pd–O–Ce(s) and palladium ions Pd2+ in the PdxCe1−xO2−δ bulk phase.
Cite: Slavinskaya E.M. , Gulyaev R.V. , Zadesenets A.V. , Stonkus O.A. , Zaikovskii V.I. , Shubin Y.V. , Korenev S.V. , Boronin A.I.
Low-Temperature CO Oxidation by Pd/CeO2 Catalysts Synthesized Using the Coprecipitation Method
Applied Catalysis B: Environmental. 2015. V.166-167. P.91-103. DOI: 10.1016/j.apcatb.2014.11.015 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Aug 29, 2014
Accepted: Nov 8, 2014
Published online: Nov 15, 2014
Published print: May 1, 2015
Identifiers:
publication_identifier.wos_identifier_type WOS:000348753400012
publication_identifier.scopus_identifier_type 2-s2.0-84911371627
publication_identifier.rinz_identifier_type 23956926
publication_identifier.accession_number_identifier_type 2014:1992476
publication_identifier.chemical_accession_number_identifier_type 162:41611
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