Recent advances of manganese-copper bimetallic oxide catalysts for catalytic oxidation of VOCs: types, preparation methods and catalytic performances.

Manganese-copper bimetallic oxide (MnCuOx) catalysts, composed exclusively of Cu, Mn, and O, have emerged as a prominent class of economical and highly active materials for the catalytic oxidation of volatile organic compounds (VOCs). This review provides a comprehensive overview of the recent advances in this field, systematically organized into three focal areas. First, it delineates the diverse types and structures of MnCuOx catalysts (e.g., CuxMn3-xO4, Cu-doped MnOx CuOx/MnOx, CuOx/CuxMn3-xO4), highlighting the composition characteristics and physicochemical properties of each type. Subsequently, the synthesis methods are critically compared, including co-precipitation, sol-gel, hydrothermal synthesis, and combustion techniques, with an emphasis on their influence on the physicochemical properties and activity of catalysts. It further evaluates the catalytic performance of these catalysts in the oxidation of typical VOCs such as toluene, acetone, and benzene. It discusses the structure-activity relationships and reaction mechanisms, alongside the current challenges regarding stability and moisture resistance. The perspectives on future research directions aimed at designing next-generation MnCuOx catalysts with enhanced efficiency and practicality for environmental applications are highlighted.