With the increasingly prominent global environmental issues,especially the high attention paid to controlling atmospheric mercury pollution,researchers have made significant progress in research on the removal technology of elemental mercury(Hg0)from coal-fired flue gas and other industrial emissions.Among them,mercury oxidation catalysts play a core role,effectively reducing atmospheric mercury emissions by catalyzing the conversion of Hg0 into divalent mercury compounds that are easy to capture and treat.Although there have been certain research achievements,the design and development of new efficient,stable,and adaptable Hg0 oxidation catalysts still face many challenges presently.This article systematically reviews Hg0 control technology and several main types of Hg0 oxidation catalysts,including molecular sieves,perovskites,precious metal catalysts,transition metal oxides,and vanadium-based SCR catalysts.A detailed description of the characteristics,advantages and disadvantages of various Hg0 oxidation catalysts is given.In addition,the article delves into the possible mechanisms of mercury oxidation,including homogeneous and multiphase oxidation mechanisms,as well as key factors affecting mercury oxidation performance.This review not only enriches the theoretical foundation of mercury pollution prevention and control,but also provides guidance for more efficient and practical Hg0 oxidation catalysts design in the future.