Abstract
Removal of carbon monoxide (CO) is a significant issue in fuel processing for the production of hydrogen. Bimetallic platinum-tin catalysts are well-known as efficient catalysts for oxidation process due to their synergistic bi-functional mechanism, their ability to dissociate molecular oxygen at low temperature, and their capacity to adsorb both atomic oxygen and CO. In this study, we synthesized titanium dioxide supported platinum-tin bimetallic catalysts for low temperature CO oxidation process with different amount of tin. Titanium dioxide provided oxygen to active sites due to its abundant oxygen vacancies and prevented metal sintering of active platinum nanoparticles. We confirmed that our titanium dioxide supported platinum-tin bimetallic catalysts showed excellent performance for low temperature CO oxidation. Moreover, the amount of tin on titanium dioxide affected the adsorption behaviors of CO and O2, resulting in the difference in catalytic activity of Pt based catalysts.
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