The effects of ligands and metal ions with HER performance of constructed MOF/NF

Hydrogen production by electrolysis of water is considered to be an effective solution to deal with the future energy crisis and environmental pollution, but the common precious metal electrocatalyst restricts its further development. Herein, three kinds of MOFs (metal-organic frameworks) were loaded on nickel foam (NF) to prepare three kinds of MOFs/NF composite materials, and a variety of MOFs/NF derived materials were prepared by pyrolysis for electrocatalytic hydrogen evolution. Among them, Ni-pydc/NF-500 prepared by pyrolysis have excellent electrocatalytic hydrogen evolution (HER) performance. For Ni-pydc/NF-500, its overpotential reached 89 mV and 128 mV at current densities of 10 mA cm⁻² and 20 mA cm⁻². At the same time, the stability of the material was also determined. After 60000 s, it can still maintain 70 % of the electrocatalytic activity, which is proved that it has good stability. At the same time, the influence of MOF structure caused by changes of metal nodes and organic ligands on hydrogen evolution performance of electrocatalysts was also explored, which gave a guiding significance for the preparation of electrocatalysts with a better HER performance.