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COMPOSITE OF PD OR PT WITH CHROMIUM OXIDE(III) AS CATALYSTS IN CO PROX AND CO TOX PROCCESSES

1,2 FILATOV Evgeny
Co-authors:
1,2 LAGUNOVA Varvara 1,3 POTEMKIN Dmitry 1,2 KORENEV Sergey
Institutions:
1 Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russian Federation
2 Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentyev Ave.3, 630090 Novosibirsk, Russian Federation, decan@niic.nsc.ru
3 Boreskov Institute of Catalysis SB RAS, Lavrentyev Ave.5, 630090 Novosibirsk, Russian Federation
Conference:
11th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 16th - 18th 2019
Proceedings:
Proceedings 11th International Conference on Nanomaterials - Research & Application
Pages:
180-185
ISBN:
978-80-87294-95-6
ISSN:
2694-930X
DOI:
https://doi.org/10.37904/nanocon.2019.8487
Published:
1st April 2020
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
823 views / 484 downloads
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Abstract

Thermal decomposition of complex salts [M(NH3)4]A (M = Pt, Pd; A = CrO4, Cr2O7) in oxygen atmosphere goes through the stage of formation of the phase MCrO2 with delafossite structure and it’s further decomposition and formation of the chromium oxide(III) and monometallic platinum or palladium. Thermal decomposition of complex salts [M(NH3)4]A (M = Pt, Pd; A = CrO4, Cr2O7) in hydrogen atmosphere proceeds with partial reduction of chromium to an metallic state and the formation of a metal solid solution MxCr1-x (M = Pt, Pd) with a chromium content up to 22 at.% and a chromium oxide(III). Catalytic properties of bimetallic Pt-Cr2O3 and Pd-Cr2O3 composites obtained by thermal decomposition in hydrogen atmosphere at the temperature 500 °C differs a lot from monometallic Pt and Pd in CO TOX and PROX processes. Addition of Cr2O3 boosted oxidative activity of metals probably due to appearance of metal-oxide interface, which is of crucial importance in catalysis.

Keywords: Platinum, palladium, chromium, catalysis, thermal decomposition

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