OF61 Identification of catalytic active sites in WO3/ZrO2 catalysts via direct STEM-HAADF imaging

Thursday, June 9, 2011: 2:30 PM
Ambassador Ballroom 3 (Detroit Marriott Hotel at the Renaissance Center )
Wu Zhou1, Nikolaos Soultanidis2, Elizabeth I. Ross-Medgaarden3, Michael S. Wong2, Israel E. Wachs4 and Christopher J. Kiely1, (1)Materials Science & Engineering, Lehigh University, Bethlehem, PA, (2)Chemical and Biomolecular Engineering, Rice University, Houston, TX, (3)Chemical Engineering, Lehigh University, Bethlehem, PA, (4)Operando Molecular Spectroscopy & Catalysis Laboratory, Department of Chemical Engineering, Lehigh University, Bethlehem, PA
Using STEM-HAADF imaging, we were able to directly image all the surface WOx species on ZrO2 for the first time, which allowed us to unambiguously identify that the ~1nm disordered Zr-WOx mixed oxide clusters act as the most catalytic active sites for both n-pentane isomerization and methanol dehydration reactions.

Extended Abstracts: