反钙钛矿氮化物CuNNi3自支撑电极制备及电催化性能OA

To broaden the range of non-noble metal electrocatalytic materials and address issues such as complex preparation,high cost,and poor electrochemical performance of traditional powder catalysts,a novel non-noble metal antiperovskite,CuNNi3,was grown on three-dimensional conductive nickel foam(NF),forming a CuNNi3/NF self-supported electrode.This structural enhance-ment improves the electrode's conductivity,significantly boosting the reaction rate and stability of electrocatalytic water splitting.Further characterization and analysis of the composition and microstructure of CuNNi3/NF were conducted,and various electro-chemical testing methods were employed to evaluate the material's electrochemical performance.Experimental results indicate that CuNNi3/NF not only exhibits excellent electrocatalytic activity for both hydrogen evolution reaction(HER)and oxygen evolution re-action(OER)with overpotentials of only 135 mV and 394 mV at a current density of 10 mA·cm-2,respectively,but also demon-strates good stability within a chronopotentiometric stability test of 25 hours.The symmetric overall water-splitting device requires only 1.80 V at 10 mA·cm-2 and maintains a stable operating voltage over long-term operation.These findings indicate that the CuN-Ni3/NF self-supported catalyst possesses excellent electrocatalytic performance.