Mechanistic in situ Investigation of Heterogeneous Hydrogenation over Rh/TiO2 Catalysts: Selectivity, Pairwise Route, Catalyst Nature | Sciact - CRIS-system of Boreskov Institute of Catalysis

Mechanistic in situ Investigation of Heterogeneous Hydrogenation over Rh/TiO2 Catalysts: Selectivity, Pairwise Route, Catalyst Nature Full article

Journal

Faraday Discussions
ISSN: 1359-6640 , E-ISSN: 1364-5498

Output data

Year: 2021, Volume: 229, Pages: 161-175 Pages count : 15 DOI: 10.1039/c9fd00138g

Tags

PARAHYDROGEN-INDUCED POLARIZATION; METAL-SUPPORT INTERACTIONS; NMR SIGNAL ENHANCEMENT; COMPLEXES; NICKEL

Authors

Pokochueva Ekaterina V. ^1,3 , Burueva Dudari B. ^1,3 , Kovtunova Larisa M. ^2,3 , Bukhtiyarov Andrey V. ^2,3 , Gladky Alexei Yu. ² , Kovtunov Kirill V. ^1,3 , Koptyug Igor V. ^1,2,3 , Bukhtiyarov Valerii I. ^2,3

Affiliations

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

Funding (2)

1	Federal Agency for Scientific Organizations	0333-2016-0002 (АААА-А16-116121510087-5)
2	Russian Science Foundation	19-13-00172

Selectivity to the products formation is strongly correlated with the nature of catalyst active centers. Therefore, the selective synthesis of active sites with certain structure is a big challenge in modern catalysis. Here the synthetic procedures are adopted for the formation of 1% Rh/TiO2 catalysts with different properties. It is shown that the nature of the precursor used for catalyst preparation is important, and the use of the solution of rhodium acetate instead of rhodium nitrate leads to the selective formation of butenes during 1,3-butadiene hydrogenation. The use of parahydrogen in the reaction results in the enhancement of NMR signals via parahydrogen-induced polarization (PHIP) for all synthesized catalysts and this signal enhancement increases with the catalyst calcination temperature increase. This effect is explained by the decoration of rhodium nanoparticles with titania that restricts hydrogen mobility on the surface leading to the highest reported to date selectivity to the pairwise hydrogen addition route of 7% for supported metal catalysts.

Pokochueva E.V. , Burueva D.B. , Kovtunova L.M. , Bukhtiyarov A.V. , Gladky A.Y. , Kovtunov K.V. , Koptyug I.V. , Bukhtiyarov V.I.
Mechanistic in situ Investigation of Heterogeneous Hydrogenation over Rh/TiO2 Catalysts: Selectivity, Pairwise Route, Catalyst Nature
Faraday Discussions. 2021. V.229. P.161-175. DOI: 10.1039/c9fd00138g WOS Scopus РИНЦ AN PMID OpenAlex

Submitted:	Dec 11, 2019
Accepted:	Jan 27, 2020
Published online:	Jan 30, 2020
Published print:	May 1, 2021

Web of science:	WOS:000656622300008
Scopus:	2-s2.0-85107390370
Elibrary:	46815733
Chemical Abstracts:	2020:340606
PMID:	33720219
OpenAlex:	W3003418828

DB	Citing
Web of science	25
Scopus	24
Elibrary	19
OpenAlex	27