Abstract
A sequence of thermal treatments in oxygen was undertaken to study the influences of oxygen adsorption on the catalytic activity of SnO 2 in CO oxidation. Commercial SnO 2 (Fluka) and tin dioxide obtained from SnCl 4 were characterized using XTD, BET, SEM TPD, and TPR methods. Catalytic activity of SnO 2 samples was carried out as a function of pre-treatment temperature in oxygen. Due to the presence of different reactive oxygen forms, CO oxidation shows the hysteretic course. The approach to the differentiated mechanism of CO oxidation over SnO 2 has been presented. The results obtained should be useful in understanding how the oxygen adsorption affects the catalytic activity of tin dioxide towards CO oxidation.
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