Influence of surface defects and local structure on oxygenate reaction pathways over metal oxide surfaces. Progress report, August 1992--July 1993.

摘要

Complete thermal desorption and photoemission studies of seven molecules (methanol, formaldehyde, formic acid, isopropanol, acetone, waste and carbon monoxide) have been completed on four different SnO(sub 2)(110) surfaces (stoichiometric, reduced, slightly-defective and highly-defective). Initial thermal desorption studies of acetic acid and propene have also been done. Results indicate that different initial surface conditions can dramatically affect: (1) probability for heterolytic dissociation of Bronsted acids, (2) reaction kinetics for unimolecular decomposition of oxygenated surface intermediates, and (3) product selectivity.