Enhanced catalytic oxidation of toluene with a MnO x /copper mesh monolithic catalyst prepared using one-step electrodeposition method

Catalytic combustion is a highly efficient technology for reducing VOCs, and the development of monolithic catalysts with superior catalytic activity suitable for industrial applications is crucial. In this study, a novel MnO x /copper mesh (CM) monolithic catalyst was prepared for toluene oxidation using a one-step electrodeposition method. The effect of deposition conditions on the catalytic performance of MnO x /CM monolithic catalysts was systematically investigated by varying the deposition time, electrolyte concentration and deposition voltage. Due to good low -temperature reducibility and higher Mn 4+ and O latt content, the T 50 % and T 90 % of 1.24 -0.2 MnO x /CM-60 catalyst could reach 229 degrees C and 242 degrees C, respectively. Furthermore, the catalyst exhibited excellent water tolerance, cycling and long-term stability. In -situ DRIFTS analysis confirmed a possible degradation pathway in which lattice oxygen in the catalyst oxidized the adsorbed toluene molecules to form intermediates (benzyl alcohol and benzoate). Subsequent replenishment of gaseous oxygen (involving oxygen vacancy creation -disappearance) led to aromatic ring breakage and the intermediates were further oxidized to maleate and finally to CO 2 and H 2 O. This study provides a reference for the in -situ construction of low-cost metalbased monolithic catalysts for VOCs catalytic oxidation.