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 |
|
||||||
Affiliations |
|
Funding (1)
1 | Russian Foundation for Basic Research | 06-03-72551 |
Abstract:
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.
Cite:
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
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
Dates:
Published online: | Sep 19, 2007 |
Published print: | Oct 30, 2007 |
Identifiers:
Web of science | WOS:000250840600010 |
Scopus | 2-s2.0-35348839818 |
Elibrary | 13542142 |
Chemical Abstracts | 2007:1208772 |
Chemical Abstracts (print) | 148:33279 |
OpenAlex | W2088864418 |