Type of Document	Dissertation
Author	Gercher, Victoria A.
URN	etd-03022006-093407
Title	Influence of oxygen vacancies on oxygenate reactions over SnO2(110) single crystal surfaces
Degree	PhD
Department	Chemical Engineering
Advisory Committee	Advisor Name Title Cox, David F. Committee Chair Anderson, Mark R. Committee Member Davis, Richey M. Committee Member Dillard, John G. Committee Member Hanson, Brian E. Committee Member
Keywords	Oxidation. Stannic oxide
Date of Defense	1994-08-05
Availability	restricted
Abstract The adsorption of a number of BrØnsted acids of differing strengths has been studied on stoichiometric and defective Sn02(110) surfaces. The extent of dissociation of these acids depends on the surface composition and the strength of the acid. Two crystallographically inequivalent types of oxygen vacancies can be introduced onto SnO02 (110) surfaces, and the kinetics of the reactions of BrØnsted acids is influenced by the number and type of oxygen vacancies present on each surface. The site requirement for dissociation of BrØnsted acids has been described as a coordinatively unsaturated cation and an available anion. On the Sn002( 110) surfaces studied, this site requirement was seen to be a necessary but not sufficient condition for dissociation. In contradiction to the generally accepted idea that the presence of defects increases reactivity, the most defective SnO2 (110) surface considered showed the lowest activity for dissociation for all adsorbates studied.
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