Chemically induced fast solid-state transitions of ω-VOPO4 in vanadium phosphate catalysts

被引：73

作者：

Conte, Marco

Budroni, Gerolamo

Bartley, Jonathan K.

Taylor, Stuart H.

Carley, Albert F.

Schmidt, Andi

Murphy, Damien M.

Girgsdies, Frank

Ressler, Thorsten

Schloegl, Robert

Hutchings, Graham J.

机构：

[1] Cardiff Univ, Sch Chem, Cardiff CF10 3AT, Wales

[2] Max Planck Gesell, Fritz Haber Inst, Dept Inorgan Chem, D-14195 Berlin, Germany

来源：

SCIENCE | 2006年 / 313卷 / 5791期

关键词：

D O I：

10.1126/science.1130493

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Vanadium phosphates are important catalysts for the oxidation of alkanes, and commercial catalysts comprise a complex range of V4+ and V5+ phosphates. We used three complementary in situ characterization methodologies-powder x-ray diffraction and laser Raman and electron paramagnetic resonance spectroscopies-to show that the metastable phase omega-VOPO4 is very sensitive to many of the reactants and products of butane oxidation. A rapid transformation from omega-VOPO4 to delta-VOPO4 occurs on exposure to butane at the reaction temperature, and hence the metastable omega-VOPO4 may play a role in the formation of commercial catalysts.

引用

页码：1270 / 1273

页数：4

共 17 条

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