Study by XPS and XAS (XANES) of tungsten oxides based catalysts:: WO2, WO3, 1% Pd/WO2 and 1% Pd/WO3

被引：9

作者：

Bigey, C ^{[1
]}

Logie, V ^{[1
]}

Bensaddik, A ^{[1
]}

Schmitt, JL ^{[1
]}

Maire, G ^{[1
]}

机构：

[1] ULP, ECPM, LERCSI, UMR 7515, F-67070 Strasbourg, France

来源：

JOURNAL DE PHYSIQUE IV | 1998年 / 8卷 / P5期

关键词：

D O I：

10.1051/jp4:1998571

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this work, the catalytic activity is correlated to the structures of the tungsten oxides surfaces and bulks deduced from XPS, XAS (XANES) and XRD data. The reactivity of 2-methyl-pentane was tested on WO3 and WO2 powders activated under H-2 at various temperatures. When palladium is added to these systems the step of hydrogenation-dehydrogenation is highly favoured which results in a much better activity of the catalysts in isomerization providing no formation of metallic tungsten is occured.

引用

页码：553 / 560

页数：8

共 16 条

[1]

BAKER BG, 1987, CATALYSIS AUTOMOTIVE, V30, P483

[2]

DEANGELIS BA, 1977, J SOLID STATE CHEM, V21, P61

[3]

FRENNET A, 1992, 10 INT C CAT BUD JUL

[4] Catalytic activity of bulk tungsten carbides for alkane reforming .3. Reaction mechanisms and the kinetic model [J].

Garin, F ;

Keller, V ;

Ducros, R ;

Muller, A ;

Maire, G .

JOURNAL OF CATALYSIS, 1997, 166 (02) :136-147

[5] BIFUNCTIONAL REACTIONS OF ALKANES ON TUNGSTEN CARBIDES MODIFIED BY CHEMISORBED OXYGEN [J].

IGLESIA, E ;

BAUMGARTNER, JE ;

RIBEIRO, FH ;

BOUDART, M .

JOURNAL OF CATALYSIS, 1991, 131 (02) :523-544

[6] The multi-surface structure and catalytic properties of partially reduced WO3, WO2 and WC+O-2 or W+O-2 as characterized by XPS [J].

Katrib, A ;

Hemming, F ;

Wehrer, P ;

Hilaire, L ;

Maire, G .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1995, 76 :195-200

[7] Surface electronic structure and isomerization reactions of alkanes on some transition metal oxides [J].

Katrib, A ;

Logie, V ;

Saurel, N ;

Wehrer, P ;

Hilaire, L ;

Maire, G .

SURFACE SCIENCE, 1997, 377 (1-3) :754-758

[8] Catalytic activity of bulk tungsten carbides for alkane reforming .2. Catalytic activity of tungsten carbides modified by oxygen [J].

Keller, V ;

Wehrer, P ;

Garin, F ;

Ducros, R ;

Maire, G .

JOURNAL OF CATALYSIS, 1997, 166 (02) :125-135

[9] CATALYTIC ACTIVITY OF BULK TUNGSTEN CARBIDES FOR ALKANE REFORMING .1. CHARACTERIZATION AND CATALYTIC ACTIVITY FOR REFORMING OF HEXANE ISOMERS IN THE ABSENCE OF OXYGEN [J].

KELLER, V ;

WEHRER, P ;

GARIN, F ;

DUCROS, R ;

MAIRE, G .

JOURNAL OF CATALYSIS, 1995, 153 (01) :9-16

[10]

MICHALOWICZ A, 1990, THESIS U PARIS

← 1 2 →