1.
Science
; 313(5791): 1270-3, 2006 Sep 01.
Article
in English
| MEDLINE
| ID: mdl-16946066
ABSTRACT
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.
2.
Angew Chem Int Ed Engl
; 45(20): 3328-31, 2006 May 12.
Article
in English
| MEDLINE
| ID: mdl-16622895