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In this work,a series of Cu-ZSM-5 catalysts with different SiO2/Al203 ratios (25,50,100 and 200) were synthesized and investigated in n-butylamine catalytic degradation.The nbutylamine can be completely catalytic degradation at 350℃ over all Cu-ZSM-5 catalysts.Moreover,Cu-ZSM-5 (25) exhibited the highest selectivity to N2,exceeding 90％ at 350℃.These samples were investigated in detail by several characterizations to illuminate the dependence of the catalytic performance on redox properties,Cu species,and aridity.The characterization results proved that the redox properties and chemisorption oxygen primarily affect n-butylamine conversion.N2 selectivity was impacted by the Brφnsted acidity and the isolated Cu2+ species.Meanwhile,the surface acid sites over Cu-ZSM-5 catalysts could influence the formation of Cu species.Furthermore,in situ diffuse reflectance infrared Fourier transform spectra was adopted to explore the reaction mechanism.The Cu-ZSM-5 catalysts are the most prospective catalysts for nitrogen-containing volatile organic compounds removal,and the results in this study could provide new insights into catalysts design for VOC catalytic oxidation.