NiSe2-CC复合材料的制备及其电分解水析氢性能的研究

Study on preparation of NiSe2-CC composite and its hydrogen production performance via electrocatalytic water splitting

金属硒化物具有优良的电催化活性,近年来一直受到广泛关注,采用水热法,以Ni(NO3)2·6H2O和硒粉为原料,在不同的循环次数条件下,合成了在碳布上生长的棒状NiSe2,即NiSe2-CC复合材料。通过XRD、SEM、EDS表征对样品的结构、样品的形貌和元素分布进行分析,通过电化学工作站对其电解水析氢性能研究。结果表明,该NiSe2-CC复合材料拥有良好的电解水析氢性能,其中,循环6次的NiSe2-CC-6复合材料的电分解水析氢的性能最好,在1mA/cm2的电流密度下,过电势为121mV;在10mA/cm2的电流密度下,过电势为223mV,塔菲尔斜率为151mV/dec,Cdl为29.7mF/cm2。

Due to the excellent electrocatalytic activity of metal selenide,it has been widely concerned by researchers in recent years.The rod-shaped NiSe2 grown on carbon cloth,namely NiSe2-CC composite,was synthesized using Ni(NO3)2·6 H2O,selenium powder as raw materials by hydrothermal method.The structure,morphology and element distribution of the sample were analyzed by XRD,SEM and EDS.The hydrogen evolution performance of the electrolyzed water was studied by electrochemical workstation.The results shown that the composite material had good electrolysis hydrogen evolution performance.Among them,the NiSe2-CC-6 composite material with 6 cycles had the best performance in electrolysis of water.The overpotential at a current density of 1 mA/cm2 was 121 mV,the overpotential at a current density of 10 mA/cm2 was 223 mV,the Tafel slope was 151 mV/dec and the Cdlwas 29.7 mF/cm2.