Size and support effects in the oxidative decomposition of methanol on amorphous alumina supported subnanometer palladium clusters were studied under realistic reaction conditions of pressure and temperature. The smaller Pd8-12 clusters were found to promote the decomposition channel to CO and hydrogen, however
with mediocre activity due to poisoning. The larger Pd15-18 clusters preferentially produce dimethyl ether and formaldehyde, without signs of posioning. A thin titania overcoat applied on the Pd15-18 improves the sintering-resistance of the catalyst. Accompanying density functional calculations confirm the posioning of small Pd clusters by CO.
Revised: January 7, 2011 |
Published: May 31, 2010
Citation
Lee S., B. Lee, F. Mehmood, S. Seifert, J.A. Libera, J.W. Elam, and J.P. Greeley, et al. 2010.Oxidative Decomposition of Methanol on Subnanometer Palladium Clusters: The Effect of Catalyst Size and Support Composition.Journal of Physical Chemistry C 114, no. 23:10342-10348. doi:10.1021/jp912220w