Abstract
The bimetallic zeolitic imidazolate frameworks (BMZIFs) are excellent precursor electrochemical materials for energy storage and conversion technologies. In this paper, a series of BMZIFs catalysts based on ZIF-8 and ZIF-67 modified by a small amount of glucose were fabricated for Oxygen Reduction Reaction (ORR). With the reasonable glucose adding and further water as solvent, the modified BMZIFs (BM2-C6-50T) exhibits excellent ORR performance with the half-wave potential reaches of 0.84 V and the limiting current density of 5.26 mA cm−2, due to the large specific surface area of 387.18 m2 g−1 and the uniform micro/mesoporous structure. The glucose can significantly improve the graphitization degree and conductivity of the catalyst. Compared with the unmodified BMZIFs, the active material Co-Nx also gets more loading due to low-dimensional structures and increasing surface areas by the water solvent modification. This work can provide a green and mild approach to modify the structure of BMZIFs to effectively improve the electrocatalytic performance for derivatization catalysts.
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