Deep catalytic combustion of N, N-dimethylformamide over titania nanotube-supporting transition metal oxides catalysts

TiO 2 -based catalysts are extensively employed in flue gas pollution control processes, including volatile organic compounds (VOCs) oxidation and selective catalytic reduction (SCR). Nonetheless, there persists challenges related to the lack of a clear mechanistic understanding and high N 2 selectivity for the selective oxidation of nitrogen-containing volatile organic compounds (NVOCs). Herein, titania nanotube-supporting transition metals oxides catalysts were prepared to degrade N, N-dimethylformamide (DMF). The results manifested that the interaction between metal and support (M−O−Ti) could enhance oxygen vacancy (O v ), hence promote the DMF decomposition. CuTi catalyst with high O v content exhibited the highest activity and N 2 selectivity for DMF decomposition. In situ diffuse reflectance infrared fourier transform spectroscopy (DRIFTs) and density functional theory (DFT) calculation also proved that CuTi catalyst facilitated the degradation of DMF into dimethylamine (DMA). Moreover, the MnTi catalyst with higher content of lattice oxygen was advantageous in facilitating the complete degradation of DMF into CO 2 , which enhanced CO 2 selectivity. This study could provide theoretical guidance for the practical industrial degradation of NVOCs using TiO 2 -based catalysts.