Novel approach to rhenium oxide catalysts for selective oxidation of methanol to DMM

被引：58

作者：

Nikonova, Olesya A. ^{[1
]}

Capron, Mickael ^{[2
,3
]}

Fang, Ge ^{[2
,3
]}

Faye, Jeremy ^{[2
,3
]}

Mamede, Anne-Sophie ^{[2
,3
,4
]}

Jalowiecki-Duhamel, Louise ^{[2
,3
]}

Dumeignil, Franck ^{[2
,3
,5
]}

Seisenbaeva, Gulaim A. ^{[1
]}

机构：

[1] SLU, Dept Chem, SE-75007 Uppsala, Sweden

[2] Univ Lille Nord France, F-59000 Lille, France

[3] UCCS, Unite Catalyse & Chim Solide, CNRS, UMR8181, F-59655 Villeneuve Dascq, France

[4] ENSCL, F-59652 Villeneuve Dascq, France

[5] Inst Univ France, F-75005 Paris, France

来源：

JOURNAL OF CATALYSIS | 2011年 / 279卷 / 02期

关键词：

Rhenium and tantalum alkoxides; Catalysts; Methanol Conversion; DMM; X-RAY-DIFFRACTION; 12-MOLYBDOPHOSPHORIC ACID CATALYSTS; OLEFIN METATHESIS; MESOPOROUS ALUMINA; SINGLE-CRYSTAL; DIMETHOXYMETHANE; REACTIVITY; TANTALUM; RAMAN; PERFORMANCE;

D O I：

10.1016/j.jcat.2011.01.028

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Novel rhenium oxide catalysts have been prepared by impregnation of mesoporous TiO2-anatase support using amounts of homometallic, such as Re4O4(OEt)(12), and heterometallic, such as Ta4O2(OEt)(14)(ReO4)(2), rhenium alkoxide solutions with subsequent thermal treatment. The structure of the produced catalytic centers was investigated by X-ray diffraction, XPS, and IR spectroscopy in order to examine the role of Re in enhancing catalytic activity. It has been demonstrated that rhenium is mostly present as perrhenate ligands attached via an oxo-bridge to an oxide surface. The catalytic activity was studied for the selective oxidation of methanol as model reaction, revealing selectivity strongly dependent on the nature of the molecular precursor: in case of ReOx/TiO2, the catalysts are showing selectivity to formaldehyde, and in case of ReOx/Ta2O5/TiO2 to DMM in rich conditions. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：310 / 318

页数：9

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