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The Nature of Active Sites in Pt–ReOX/TiO2 Catalysts for Selective Hydrogenation of Carboxylic Acids to Alcohols Full article

Journal Journal of Energy Chemistry
ISSN: 2095-4956
Output data Year: 2015, Volume: 24, Number: 5, Pages: 646-654 Pages count : 9 DOI: 10.1016/j.jechem.2015.09.003
Tags Hexanoic acid, Hexanol, Nanoparticles, Platinum, Rhenium, Selective hydrogenation
Authors Suknev Alexey 1 , Zaikovskii Vladimir 1,2 , Kaichev Vasily 1,2 , Paukshtis Eugenii 1,2 , Sadovskaya Ekaterina 1,2 , Balʹzhinimaev Bair 1
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave., 5, 630090, Novosibirsk, Russia
2 Novosibirsk State University, Pirogova Str., 2, 630090, Novosibirsk, Russia

Abstract: The highly dispersed Pt-ReOX (x 1) sites ca. 0.5 nm in size were formed via a successive and strong interaction of the Re precursor with titania and then of the Pt complex with deposited low-valent rhenium oxide clusters. The size, charge and chemical composition were characterized by means of HRTEM/STEM with EDX mapping, XPS, and FTIRS. These sites with Re/Pt = 2 were shown to be highly active and selective in the hydrogenation of carboxylic acid to alcohol under very mild conditions (T = 130 °C, P = 50 bar). The reaction rate constant for the hydrogenation of hexanoic acid increased linearly with the Pt content. As for the homogeneous pincer-type Ru-organic complexes, the active Pt-ReO sites can dissociate heterolytically the molecular hydrogen with the formation of hydroxyl groups and Pt hydride for hydrogenation of the carboxylic group. Indeed, TOF of 20 h-1 and selectivity of 98%-99% are approaching the values typical of homogeneous catalysts. The first order kinetics described well the experimental data obtained in a wide range of reaction conditions. © 2015 Science Press and Dalian Institute of Chemical Physics.
Cite: Suknev A. , Zaikovskii V. , Kaichev V. , Paukshtis E. , Sadovskaya E. , Balʹzhinimaev B.
The Nature of Active Sites in Pt–ReOX/TiO2 Catalysts for Selective Hydrogenation of Carboxylic Acids to Alcohols
Journal of Energy Chemistry. 2015. V.24. N5. P.646-654. DOI: 10.1016/j.jechem.2015.09.003 WOS Scopus РИНЦ OpenAlex
Dates:
Submitted: Jun 24, 2015
Accepted: Aug 12, 2015
Published print: Sep 1, 2015
Published online: Sep 14, 2015
Identifiers:
Web of science: WOS:000364260100015
Scopus: 2-s2.0-84944720587
Elibrary: 24962843
OpenAlex: W2394718958
Citing:
DB Citing
Web of science 32
Scopus 33
Elibrary 31
OpenAlex 33
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