Research progress and future challenges of CO catalytic oxidation catalysts: Preparation, catalytic performance, reaction mechanism and anti-poisoning strategies

Abstract

Carbon monoxide (CO) is one of the primary pollutants in the atmosphere, with high concentrations posing serious impacts on human health and the environment. CO is primarily generated through the incomplete combustion of fossil fuels such as coal and petroleum. Among existing CO removal technologies, the catalytic oxidation is considered one of the most effective technologies. This paper reviews the research advances and future challenges in the catalytic oxidation of CO over the past decade, focusing on this classic and crucial topic. At first, this review introduces recent advances in several active metal catalysts for CO catalytic oxidation, including —Pt, Au, Pd, Ag, Cu, Mn, Fe and so on. Subsequently, it summarizes several reaction mechanisms and characteristics of CO catalytic oxidation, discusses the effects of impurities present in the reaction environment (such as H2O, SO2, phosphorus, and chlorine) on catalyst activity, and then proposes the corresponding solution strategy. Finally, the prospects are outlined for the rational design of highly efficient catalysts for CO catalytic oxidation, the research into enhancing their performance, and future developments in this field.