TY - JOUR
T1 - Single-Site VO x Moieties Generated on Silica by Surface Organometallic Chemistry: A Way To Enhance the Catalytic Activity in the Oxidative Dehydrogenation of Propane
AU - Barman, Samir
AU - Maity, Niladri
AU - Bhatte, Kushal Deepak
AU - Ould-Chikh, Samy
AU - Dachwald, Oliver
AU - Haeßner, Carmen
AU - Saih, Youssef
AU - Abou-Hamad, Edy
AU - Llorens, Isabelle
AU - Hazemann, Jean-Louis
AU - Köhler, Klaus
AU - D’Elia, Valerio
AU - Basset, Jean-Marie
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The research was supported by the King Abdullah University of Science and Technology (KAUST). O.D. would like to thank KAUST ORS for research support.
PY - 2016/8/8
Y1 - 2016/8/8
N2 - We report here an accurate surface organometallic chemistry (SOMC) approach to propane oxidative dehydrogenation (ODH) using a μ2-oxo-bridged, bimetallic [V2O4(acac)2] (1) (acac = acetylacetonate anion) complex as a precursor. The identity and the nuclearity of the product of grafting and of the subsequent oxidative treatment have been systematically studied by means of FT-IR, Raman, solid-state (SS) NMR, UV-vis DRS, EPR and EXAFS spectroscopies. We show that the grafting of 1 on the silica surface under a rigorous SOMC protocol and the subsequent oxidative thermal treatment lead exclusively to well-defined and isolated monovanadate species. The resulting material has been tested for the oxidative dehydrogenation of propane in a moderate temperature range (400-525 °C) and compared with that of silica-supported vanadium catalysts prepared by the standard impregnation technique. The experimental results show that the catalytic activity in propane ODH is strongly upgraded by the degree of isolation of the VOx species that can be achieved by employing the SOMC protocol. © 2016 American Chemical Society.
AB - We report here an accurate surface organometallic chemistry (SOMC) approach to propane oxidative dehydrogenation (ODH) using a μ2-oxo-bridged, bimetallic [V2O4(acac)2] (1) (acac = acetylacetonate anion) complex as a precursor. The identity and the nuclearity of the product of grafting and of the subsequent oxidative treatment have been systematically studied by means of FT-IR, Raman, solid-state (SS) NMR, UV-vis DRS, EPR and EXAFS spectroscopies. We show that the grafting of 1 on the silica surface under a rigorous SOMC protocol and the subsequent oxidative thermal treatment lead exclusively to well-defined and isolated monovanadate species. The resulting material has been tested for the oxidative dehydrogenation of propane in a moderate temperature range (400-525 °C) and compared with that of silica-supported vanadium catalysts prepared by the standard impregnation technique. The experimental results show that the catalytic activity in propane ODH is strongly upgraded by the degree of isolation of the VOx species that can be achieved by employing the SOMC protocol. © 2016 American Chemical Society.
UR - http://hdl.handle.net/10754/621677
UR - https://pubs.acs.org/doi/10.1021/acscatal.6b01263
UR - http://www.scopus.com/inward/record.url?scp=84984920652&partnerID=8YFLogxK
U2 - 10.1021/acscatal.6b01263
DO - 10.1021/acscatal.6b01263
M3 - Article
SN - 2155-5435
VL - 6
SP - 5908
EP - 5921
JO - ACS Catalysis
JF - ACS Catalysis
IS - 9
ER -