The invention discloses a multi-
metal MOFs derived
oxygen reduction /
oxygen evolution double-function catalytic material, and a preparation method thereof. The preparation method comprises following steps:
room temperature coprecipitation is adopted to synthesis a Zn / Co / Fe multi-
metal ZIF precursor; then sulfuration and
sintering treatment technology is adopted for combination of
oxygen reduction reaction (ORR) active sites (Co / Fe-N-C) and
oxygen evolution reaction (OER) active sites (Co / Fe-S) on a
monomer material, so that the double ORR / OER
electrocatalyst which is low in cost and possesses the performance as good as that of commercially available catalysts is obtained. According to the preparation method, two important factors, including
active site distribution and catalytic mechanism,with great influences on material performance are taken into comprehensive consideration, realization of the optimal material
catalytic oxidation reduction /
oxygen evolution reaction efficiency is taken as a design principle, optimization design is adopted to obtain the best Zn / Co / Fe ratio in the precursor, and the catalyst is provided with the best catalytic performance. The multi-
metal MOFs derived
oxygen reduction /
oxygen evolution double-function catalytic material possesses both high efficiency
oxygen reduction and oxygen evolution performance, is high in specific surface area, is abundantin micropores, and is uniform in
active site dispersion; and the cost is much lower than that of commercially available
precious metal catalyst catalytic materials.