Strong Metal–Support Interactions for Palladium Supported on TiO2 Catalysts in the Heterogeneous Hydrogenation with Parahydrogen

Strong Metal–Support Interactions for Palladium Supported on TiO2 Catalysts in the Heterogeneous Hydrogenation with Parahydrogen Full article

Journal

ChemCatChem
ISSN: 1867-3880

Output data

Year: 2015, Volume: 7, Number: 17, Pages: 2581-2584 Pages count : 4 DOI: 10.1002/cctc.201500618

Authors

Kovtunov Kirill V. ^1,2 , Barskiy Danila A. ^1,2 , Salnikov Oleg G. ^1,2 , Burueva Dudari B. ^1,2 , Khudorozhkov Alexander K. ^3,2 , Bukhtiyarov Andrey V. ^3,2 , Prosvirin Igor P. ^3,2 , Gerasimov Evgeny Y. ^3,2 , Bukhtiyarov Valerii I. ^3,2 , Koptyug Igor V. ^1,2

Affiliations

1	Laboratory of Magnetic Resonance Microimaging, International Tomography Center, SB RAS, 3 A Institutskaya St., Novosibirsk 630090 (Russia)
2	Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090 (Russia)
3	Boreskov Institute of Catalysis SB RAS, 5 Acad. Lavrentiev Pr., Novosibirsk 630090 (Russia)

Parahydrogen-induced polarization (PHIP) was successfully utilized to demonstrate the strong metal–support interaction (SMSI) effect for palladium supported on titania catalysts. Heterogeneous hydrogenation of 1,3-butadiene over Pd/TiO2 catalysts led to the formation of 1- and 2-butenes and butane, and hyperpolarized products were obtained if parahydrogen was used in the reaction. However, if the catalysts were reduced in H2 flow at 500 °C before the hydrogenation reaction, the observed polarization levels were significantly lower or even zero, which was indicative of the suppression of the pairwise addition of hydrogen route. This observation indicated the possibility to detect the SMSI effect by the PHIP technique. Moreover, by using X-ray photoelectron spectroscopy it was shown that Pd is partially present as Pdδ+ after reduction under a hydrogen atmosphere at 500 °C. These results were confirmed by transmission electron microscopy, which revealed the formation of Pdδ+ and the dissolution of Pd in the titania lattice.

Kovtunov K.V. , Barskiy D.A. , Salnikov O.G. , Burueva D.B. , Khudorozhkov A.K. , Bukhtiyarov A.V. , Prosvirin I.P. , Gerasimov E.Y. , Bukhtiyarov V.I. , Koptyug I.V.
Strong Metal–Support Interactions for Palladium Supported on TiO2 Catalysts in the Heterogeneous Hydrogenation with Parahydrogen
ChemCatChem. 2015. V.7. N17. P.2581-2584. DOI: 10.1002/cctc.201500618 WOS Scopus

Published print:

Sep 1, 2015

Web of science:	WOS:000360821200003
Scopus:	2-s2.0-84940796345

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