OA12 Determination of Active Sites of the Water-Gas Shift Reaction over Supported Au and Pt Nanoparticles

Monday, June 6, 2011: 3:40 PM
Cabot Ballroom (Detroit Marriott Hotel at the Renaissance Center )
Fabio H. Ribeiro1, Mayank Shekhar1, W. Damion Williams1, Wen-Sheng Lee1, Jun Wang1, Joshua L. Ratts1, Ajay M. Joshi1, Luis Bollmann1, Seung Min Kim2, Eric Stach2, Jeffrey T. Miller3, Lawrence F. Allard4 and W. Nicholas Delgass1, (1)Chemical Engineering, Purdue University, West Lafayette, IN, (2)Materials Engineering, Purdue University, West Lafayette, IN, (3)Chemical Science and Engineering Division, Argonne National Laboratory, Argonne, IL, (4)Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN
Water-gas shift rate per total mole of Au varies as d-2.7±0.1 and d-2.2±0.2 for Au/TiO2 and Au/Al2O3 catalysts respectively, which shows that the active sites are low coordinated corner and perimeter Au atoms. In contrast, all surface Pt atoms exhibit the same rate on Pt/Al2O3 and Pt/SiO2 catalysts.

Extended Abstracts: