泡沫镍载NiCO2O4电极的制备及其催化H2O2电氧化的性能

Preparation and Electrocatalytic Performance of NiCo2O4/Ni Foam for Hydrogen Peroxide Electrooxidation

本文以水热法结合热处理法原位制备了泡沫镍载NiCo2O4纳米线电极,使用XRD、SEM和TEM对合成的NiCo2O4纳米线进行了表征,NiCo2O4纳米线直径约80 nm,长度约3~5μm.使用循环伏安和计时电流法测试了泡沫镍载NiCo2O4纳米线催化H2O2的电氧化性能,结果表明泡沫镍载NiCo2O4纳米线对H2O2电氧化有着优良的催化活性、稳定性和传质性能,在0.3 V电位下0.4 mol·L-1H2O2和2 mol·L-1NaOH溶液中氧化电流可达380 mA·cm-2.

The electrodes of Ni foam supported NiCo2O4 nanowires were prepared by hydrothermal method, followed by a thermal treatment in air, and were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM) and transmission electron microscopy(TEM). It was found that the NiCo2O4 nanowires had a diameter of about 50 nm with a length up to 3~5 μm.The catalytic performances of the Ni foam supported NiCo2O4 nanowires for H2O2 electrooxidation were studied by cyclic voltammetry and chronoamperometry. The results show that the Ni foam supported NiCo2O4 nanowires electrode exhibited superior activity, stability, and mass transport property for H2O2 electrooxidation. A current density of 380 mA·cm-2 was achieved at 0.3 V in 0.4 mol·L-1 H2O2 and 2 mol·L-1 NaOH at room temperature.