Vanadium Species in New Catalysts for the Selective Oxidation of Methane to Formaldehyde: Activation of the Catalytic Sites | Sciact - CRIS-system of Boreskov Institute of Catalysis

Vanadium Species in New Catalysts for the Selective Oxidation of Methane to Formaldehyde: Activation of the Catalytic Sites Full article

Conference

Catalytic Nano-Oxides Research and Development in Europe : Present and Future
16-19 May 2006 , Seville

Journal

Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308

Output data

Year: 2007, Volume: 128, Number: 3-4, Pages: 176-182 Pages count : 7 DOI: 10.1016/j.cattod.2007.07.014

Tags

Electrophilic oxygen species, Formaldehyde, Heterogeneous catalysis, Hydroxylated monomeric vanadium species, In situ IR spectroscopy, Mesoporous silica, Methane oxidation, Operando Raman spectroscopy, Supported vanadium oxide

Authors

Launay H. ¹ , Loridant S. ¹ , Nguyen D.L. ¹ , Volodin A.M. ² , Dubois J.L. ³ , Millet J.M.M. ¹

Affiliations

1	IRCELYON, Institut de Recherches sur la Catalyse et l’Environnement de Lyon, CNRS, Universite´ Claude Bernard Lyon I, UMR5256, 2 Avenue Albert Einstein, Villeurbanne F-69626 cedex, France
2	Boreskov Insitute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
3	Arkema, Centre de Recherches Rhone-Alpes, rue Henri Moissan, BP 63, F-69493 Pierre-Benite cedex, France

Funding (1)

Russian Foundation for Basic Research

06-03-72551

New vanadium oxide supported on mesoporous silica catalysts for the oxidation of methane to formaldehyde were investigated by infrared and Raman spectroscopies to identify and characterize the molecular structure of the most active and selective catalytic sites. In situ and operando experiments have been conducted in order to understand the redox and hydroxylation/dehydroxylation processes of the vanadium species. (SiO)2VO(OH) species were identified in these catalysts in reaction conditions and shown to undergo a deprotonation at 580 °C under vacuum, leading to a site giving a photoluminescence band at 550 nm attributed to reverse radiative decay from the excited triplet state: (V4+–O−)* ⇆ (V5+double bond; length as m-dashO2−). An activation mechanism of vanadium monomeric species with electrophilic oxygen species is proposed.

Launay H. , Loridant S. , Nguyen D.L. , Volodin A.M. , Dubois J.L. , Millet J.M.M.
Vanadium Species in New Catalysts for the Selective Oxidation of Methane to Formaldehyde: Activation of the Catalytic Sites
Catalysis Today. 2007. V.128. N3-4. P.176-182. DOI: 10.1016/j.cattod.2007.07.014 WOS Scopus РИНЦ ANCAN OpenAlex

Published online:	Sep 19, 2007
Published print:	Oct 30, 2007

Web of science:	WOS:000250840600010
Scopus:	2-s2.0-35348839818
Elibrary:	13542142
Chemical Abstracts:	2007:1208772
Chemical Abstracts (print):	148:33279
OpenAlex:	W2088864418

DB	Citing
Web of science	50
Scopus	53
Elibrary	51
OpenAlex	50