The Nature of Active Sites in Pt–ReOX/TiO2 Catalysts for Selective Hydrogenation of Carboxylic Acids to Alcohols | Sciact - CRIS-system of Boreskov Institute of Catalysis

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

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.

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

Submitted:	Jun 24, 2015
Accepted:	Aug 12, 2015
Published print:	Sep 1, 2015
Published online:	Sep 14, 2015

Web of science:	WOS:000364260100015
Scopus:	2-s2.0-84944720587
Elibrary:	24962843
OpenAlex:	W2394718958

DB	Citing
Web of science	31
Scopus	33
Elibrary	31
OpenAlex	33