The Redox Properties of RhxCe1-xO2-δ Solid Solution in CO Oxidation Reaction | Sciact - CRIS-system of Boreskov Institute of Catalysis

The Redox Properties of RhxCe1-xO2-δ Solid Solution in CO Oxidation Reaction Conference Abstracts

Conference

EuropaCat-XIII: 13th European Congress on Catalysis
27-31 Aug 2017 , Florence

Source

13th European Congress on Catalysis
Compilation, 2017.

Output data

Year: 2017, Article number : P3.111, Pages count : 2

Authors

Kibis Lidiya S. ^1,2 , Kardash Tatyana Yu. ^1,2 , Derevyannikova Elizaveta A. ^1,2 , Slavinskaya Elena M. ^1,2 , Stonkus Olga A. ^1,2 , Boronin Andrei I. ^1,2

Affiliations

1	Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia
2	Novosibirsk State University, Novosibirsk, 630090, Russia

Funding (2)

1	The Ministry of Education and Science of the Russian Federation	МК-6911.2016.3
2	Federal Agency for Scientific Organizations	0303-2016-0003

The Rh/CeOx catalysts prepared by co-precipitation method were studied by a complex of physical-chemical methods. The formation of RhxCe1-xO2-δ solid solution was shown. Catalysts demonstrated activity in CO oxidation reaction at temperatures below 500C. Heating of the samples up to 10000C resulted in substantial decrease of activity. By TPR-CO experiments several types of active centers were detected. For identification of the nature of active species the XPS experiments with step-by-step reduction and re-oxidation of the samples were performed in ex situ regime. CO interaction with Rh/CeOx-4500C samples at temperatures below 100-1500C resulted in reduction of CeO2 surface whereas Rh remained in oxidized state. At higher temperatures formation of Rhnδ+ species were detected with 80% reduction of rhodium at T>3000C. Catalysts could be reoxidized by O2 already at RT. For Rh/CeOx-10000C samples redox processes required higher temperatures.

Kibis L.S. , Kardash T.Y. , Derevyannikova E.A. , Slavinskaya E.M. , Stonkus O.A. , Boronin A.I.
The Redox Properties of RhxCe1-xO2-δ Solid Solution in CO Oxidation Reaction
In compilation 13th European Congress on Catalysis. 2017. – C.212-213.

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