Bimetal NiCo-MOF-74 for highly selective NO capture from flue gas under ambient conditions.

The mixed bimetal metal-organic framework NiCo-MOF-74 has been constructed by the solvothermal method for NO adsorption. The results showed that bimetal NiCo-MOF-74 takes up NO with a capacity of up to 174.3 cc g under ambient conditions, which is 16.3% higher than that of the best single metal Co-MOF-74. The IAST adsorption selectivity for a NO/CO binary mixture can reach a maximum of 710 at low adsorption partial pressure, while the regeneration performance can be retained even after five cyclic adsorption-desorption experiments. Its separation performance was further confirmed by breakthrough experiments, indicating this new bimetal NiCo-MOF-74 as one of the best materials for NO adsorption and separation in flue gas.