Abstract: A series of monolithic catalysts Co_nCu₁O_x@NF(n = 0.5, 1, 2, 3）with varying Co/Cu molar ratios were synthesised via in situ electrodeposition using nickel foam as carrier. The catalyst Co₃Cu₁O_x@NF demonstrated the most effective catalytic activity for the catalytic oxidation of toluene, with T₂₀ and T₉₀ values of 201℃ and 219℃, respectively, at a concentration of toluene of 1 000 mg/m³ and a space velocity of 15 000 mL/（g.h）. Furthermore, the catalyst Co₃Cu₁O_x@NF exhibited the lowest apparent activation energy for the catalytic oxidation of toluene（E_a = 21.79 kJ/mol）, the catalytic activity remained stable throughout the 40 h stability test, exhibiting excellent stability. The physicochemical properties of the catalysts were investigated using SEM, EDS, XRD, XPS, Raman spectroscopy and H₂-TPR. The results demonstrate that the Co₃Cu₁O_x@NF catalyst surface exhibits a three-dimensional mesh structure, with the active substances successfully loaded and uniformly dispersed. Additionally, the Co³⁺/Co²⁺ and O_ads/O_Latt ratios are at their highest, and the oxygen defects and redox properties are abundant and excellent.

Key words: catalytic oxidation, monolithic catalyst, toluene, nickel foam, electrodeposition