Developing a thermally stable Co/Ce-Sn catalyst via adding Sn for soot and CO oxidation

The thermal stability of the catalysts is of particular importance but still a big challenge for working under harsh conditions at high temperature. In this study, we report a strategy to improve the thermal stability of the ceria-based catalyst via introducing Sn. XRD, Rietveld refinement, and other characterizations results indicated that the formation of Sn-Co solid solution plays a key role in the thermal stability of the catalyst. The developed ternary 3%Co/Ce0.5Sn0.5O2 catalyst not only exhibits outstanding thermal stability and resistance to SO2 and H2O for soot oxidation from diesel vehicle exhaust but also remains extraordinary thermal stability for CO oxidation. Remarkably, even after thermal aging at 1000 degrees C, it still possessed high catalytic activity similar to that of the fresh catalyst.

Automated summary

This study presents a strategy to enhance the thermal stability of ceria-based catalysts by introducing tin. The developed ternary catalyst exhibits exceptional thermal stability, resistance to sulfur dioxide and water, and remains highly catalytically active even after thermal aging at 1000 degrees Celsius.