Vanadium species in new catalysts for the selective oxidation of methane to formaldehyde: Specificity and molecular structure dynamics with water

Launay, H.; Loridant, S.; Pigamo, A.; Dubois, Jean‐Luc; Millet, J.M.M.

doi:10.1016/j.jcat.2007.01.004

Cited by 55 publications

(45 citation statements)

References 45 publications

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“…As regards to hydrated conditions, different structures O¼ ¼V(OH)(OM) 2 and O¼ ¼V(OH) 2 (OM) have been proposed based on IR and Raman spectra. [8][9][10][11][12][13] A recent computational study on vanadia/silica surfaces 25 shows that all these structures may be stable depending on the external conditions such as temperature and water partial pressure. The common feature of hydrated vanadia species would thus be the presence of VÀ ÀOH groups coming from the hydroxylation of VÀ ÀOM bonds with the support.…”

Section: Computational Detailsmentioning

confidence: 99%

See 1 more Smart Citation

Density functional theory study of the oxidation of methanol to formaldehyde on a hydrated vanadia cluster

González-Navarrete¹,

Gracia²,

Calatayud³

et al. 2010

J Comput Chem

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Section: Computational Detailsmentioning

confidence: 99%

“…Hydration is found to dramatically change the molecular structure of the active supported vanadium species. [8][9][10][11][12][13] Specifically, hydration enhances polymerization and Brønsted acidity due to the presence of VÀ ÀOH groups. Such groups are also present in gas-phase clusters exposed to water or methanol.…”

Section: Introductionmentioning

confidence: 99%

Density functional theory study of the oxidation of methanol to formaldehyde on a hydrated vanadia cluster

González-Navarrete¹,

Gracia²,

Calatayud³

et al. 2010

J Comput Chem

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“…Compounds of vanadium, due to their reactivity and remarkable stability, have been utilized as efficient catalysts for a variety of catalytic reactions [12][13][14][15][16], especially for the catalytic selective oxidation of benzene to phenol [17][18][19][20][21]. Recently, various vanadium containing mesoporous molecular sieves such as V-MCM-41 [22,23], V-MCM-48 [24] and V-SBA-15 [25,26] have been prepared by hydrothermal methods through different synthesis routes.…”

Section: Introductionmentioning

confidence: 99%

One-pot Hydrothermal Synthesis of Mesoporous V-SBA-16 with a Function of the pH of the Initial Gel and its Improved Catalytic Performance for Benzene Hydroxylation

et al. 2012

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V-SBA-16 catalysts with uniform cubic mesoporous structure were prepared by direct hydrothermal method as a function of the pH of the initial gel and characterized by ICP, XRD, TEM, N 2 adsorption-desorption, DRUV-vis and Raman spectra. The pH of the initial gel in synthesis of V-SBA-16 show important effects on the maintenance of well ordered mesoporous structure, introduced vanadium content and the incorporation of vanadium into the network of SBA-16 type mesoporous material. The initial gel system with a pH value of 2.0 was found to be a suitable for incorporation of vanadium and retaining the mesostructure of SBA-16. The catalytic activities of V-SBA-16 catalysts were evaluated for the hydroxylation of benzene using molecular O 2 as the oxidant. The highest phenol yield of 30.4% with a selectivity of 90% and turnover number of 105 were obtained over the VS-2.0 (1.67) sample prepared at the initial gel system with pH value of 2.0, which is attributed to its high V content and uniform framework V species that highly dispersed on the well ordered SBA-16 type mesoporous materials.

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“…Since there is a wide consensus that C-H activation can be efficiently carried out by transition metal oxide catalysts [4,5], most early studies of methane activation by oxide clusters focused on the transition metal oxide clusters with character of oxygen-centered radicals such as FeO + [6], MoO þ 3 [7], OsO þ 4 [8], and V 4 O þ 10 [9]. Recently, studies on main-group metal oxide clusters such as ðAl 2 O 3 Þ þ…”

Section: Introductionmentioning

confidence: 99%

Room-temperature methane activation by a bimetallic oxide clusterAlVO4+

Wang

Zhao

et al. 2010

Chemical Physics Letters

101

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Vanadium species in new catalysts for the selective oxidation of methane to formaldehyde: Specificity and molecular structure dynamics with water

Cited by 55 publications

References 45 publications

Density functional theory study of the oxidation of methanol to formaldehyde on a hydrated vanadia cluster

Density functional theory study of the oxidation of methanol to formaldehyde on a hydrated vanadia cluster

One-pot Hydrothermal Synthesis of Mesoporous V-SBA-16 with a Function of the pH of the Initial Gel and its Improved Catalytic Performance for Benzene Hydroxylation

Room-temperature methane activation by a bimetallic oxide clusterAlVO4+

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