Effect of tin content on TiO2-supported platinum-tin bimetallic catalysts for low temperature CO oxidation reaction

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 sup-ported 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 pre-vented metal sintering of active platinum nanoparticles. We confirmed that our titanium dioxide sup-ported 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 O-2, resulting in the difference in catalytic activity of Pt based catalysts.CO 2023 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chem-istry.