High mineralization efficiency of chlorobenzene oxidation using a metal-interaction strengthening MnCoO_x catalyst derived from ZIF-67

Herein, a Mn cations highly dispersed and bimetallic interfacial interaction strengthen catalyst, MnCoO_x, via combinations of MOF-templated method, Mn cation doping has been constructed for the chlorobenzene (CB) oxidation. As a result, MnCoO_x-M possessed the best chlorobenzene degradation capacity and stability than those of similar bimetallic compounds prepared by co-precipitation method and single-phase oxide. Notably, this superior catalyst obtained a high mineralization efficiency with inhibition effect of the CO generation. The excellent performance of MnCoO_x-M can be conducted to the good dispersion of the metal cations as well as a stronger Mn-Co interaction, which are further induced the excellent redox properties of the catalyst. Besides, the humidity tolerance experiments showed that a certain H₂O participation can significantly inhibit the generation of some types of organic by-products, especially chlorinated organic compounds. Mechanistic studies showed that chlorobenzene dissociated on the surface of MnCoO_x-M to form benzoquinone, phenolates, maleates, etc., which were finally oxidized to inorganic products.