The synthe�c procedure of ZIF-62(Zn) was adopted from our previous work . 12.79 g of benzimidazole and 38.02 g of imidazole were successively dissolved in 480 ml of DMF. The solu�on was s�rred for 5 minutes. Subsequently, 19.93 g of Zn nitrate hexahydrate was added to the mixture. The solu�on was s�rred further un�l complete dissolu�on. The resul�ng synthe�c Zn:Im:bIm molar ra�o was approximately 3:25:5. The solu�on was then transferred into a 500 ml glass jar and kept for 60 h at 130 °C. White sediment was separated from the mother liquor by centrifuga�on (10 min, 10000 rpm), and thoroughly washed with DMF and DCM, 2 �mes each. Finally, the obtained ZIF-62 powder was tempered (ac�vated) in a vacuum furnace (25 mbar, 150°C, 72 h).