Date of Award

Summer 1994

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry & Biochemistry

Program/Concentration

Chemistry

Committee Director

Kenneth G. Brown

Committee Member

Robert L. Ake

Committee Member

Donald Oglesby

Committee Member

Billy T. Upchurch

Call Number for Print

Special Collections LD4331.C45P37

Abstract

Platinum/tin(IV) oxide-based catalysts have been developed for the oxidation of carbon monoxide at 55 °C and 1 atmosphere pressure. A diffuse reflectance infrared fourier transform spectroscopic (DRIFTS) investigation of this oxidation has been performed. Four catalyst samples have been subjected to a 5% carbon monoxide pretreatment at 125 °C, helium exposure at 55 °C, bottled air (20% oxygen) exposure at 55 °c, and exposure to a 2:1 stoichiometric mixture of carbon monoxide and oxygen at 55 °C. During the course of these exposures, evidence for the development of two different surface carbon monoxide configurations has been found: one that is easily oxidizable and one that is inactive. Evidence has also confirmed the development of surface hydroxyl groups indicating surface rehydroxylation and dehydroxylation over the course of the different exposures. The effect of a proprietary promoter in these catalysts has also been examined.

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