Recent Advances of Ceria-Based Materials in the Oxidation of Carbon Monoxide

Carbon monoxide (CO) is a toxic and harmful gas pollutant. The realization of low-temperature CO oxidation has been the focus of research. Also, CO oxidation as a typical model reaction is conducive to the in-depth study of the catalytic reaction mechanism. Due to its unique oxygen storage/release capacity (OSC) and the easy transition between Ce3(+) and Ce4(+), CeO2 is widely used as a catalyst and catalyst support in many important reactions, especially the low-temperature CO oxidation reaction. Herein, the application of cerium-based materials in low-temperature CO oxidation and CeO2 activity enhancement strategies in recent years are elaborated upon, including metal loading, adjustment of exposed facets of CeO2, and metal doping, through metal-support interaction and the generation of oxygen vacancies on the CeO2 surface to improve the CO oxidation activity of cerium-based catalysts. At the end of the review, the synthesis of Ce-based materials and their applications and challenges in the field of CO oxidation are looked at.

Automated summary

Research on low-temperature CO oxidation has shown that CeO2, widely used as a catalyst and catalyst support, plays a key role in improving the activity of cerium-based catalysts in CO oxidation. Several strategies for enhancing CeO2 activity, including metal loading and adjusting exposed facets, have been explored.