1. College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
2. College of Science, Southern University of Science and Technology, Shenzhen 518055, China
In recent years, cobalt-based catalytic materials have emerged as prominent catalysts due to their multivalence, high coordination number, and unsaturated d orbitals. These unique characteristics have attracted widespread attention in CO catalytic oxidation technologies. The development of highly efficient catalysts for long-term stable low-temperature CO catalysis has remained a focal point to promote the practical application of cobalt-based catalytic materials. This is particularly crucial in various applications such as automotive exhaust and industrial flue gas treatment for CO removal to prevent catalyst deactivation, as well as in methanol-steam reforming for hydrogen fuel cell feedstock purification through effective preferential oxidation of CO. In this review, we comprehensively summarize multiple strategies employed for enhancing the activity of cobalt-based catalyst. By regulating these modifications, the activity, stability, and tolerance of the catalysts are significantly improved. Additionally, this review briefly elaborates the reaction mechanisms of CO oxidation over cobalt-based catalysts, and the research hot topics are also summarized. Overall, this review provides valuable insights into advancing research efforts and commercialization prospects concerning cobaltbased catalytic materials.