Low-temperature selective catalytic reduction of NO with CO over Nix-MOF-5

作者：He, Hanbing; Zhang, Chao; Wang, Yusi; Zhang, Li; Zeng, Jing^*

来源：Journal of Materials Science, 2022, 57(4): 2502-2513.

DOI：10.1007/s10853-021-06795-0

• MOF-5
• MN
• STABILITY
• NI
• CU

The catalyst with a high NO conversion rate and good sulfur resistance is the key to CO-selective catalytic reduction (CO-SCR). Ni doping MOF-5 was synthesized successfully through a one-pot solvothermal method. X-ray diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (Raman), specific surface area analyzer (BET) and X-ray photoelectron spectroscopy (XPS) were used to characterize the structure of the catalyst. The results showed that the doped Ni partly replaced the Zn site in MOF-5 to form a bimetallic organic framework and raised the concentration of adsorbed oxygen in the catalyst. Compared with pure MOF-5, Ni-x-MOF-5 exhibited better catalytic activity. Specifically, the NO conversion rate of Ni-1/12-MOF-5 catalyst increased from 32 to 80% at 160 degrees C and 85% to 94% at 240 degrees C. Even in the sulfur-containing environment, the NO conversion rate could reach 80% at 240 degrees C.