NiO薄膜制备及电催化性能测试教学实验设计

Experimental teaching design of NiO film preparation and electrocatalytic performance test

该文针对目前含尿素废水高温水解处理的成本和能耗问题,进行了NiO薄膜制备及电催化分解尿素的综合性教学实验设计。通过控制条件采用水热法,在导电玻璃FTO基底上生长了多孔道网络微结构NiO薄膜,研究了水热时间、煅烧温度、添加表面活性剂等制备条件对NiO薄膜电催化分解尿素性能的影响。对NiO薄膜进行XRD、XPS、SEM、TEM等组成、形貌表征,以及CV、LSV、Tafel曲线、EIS等电化学测试,结果表明:在最优水热12 h,300℃煅烧,添加结构导向剂EDTA条件下,制备的NiO薄膜电极与现有文献报道的镍泡沫电极材料相比,尿素电催化分解起始电位由0.60 V降低为0.36 V。

In view of the cost and energy consumption of high temperature hydrolysis treatment of urea-containing wastewater, a comprehensive experimental teaching design of NiO film preparation and electrocatalytic decomposition of urea is carried out. The porous channel network microstructure of Ni O film is grown on conductive glass FTO substrates by hydrothermal method under control conditions. The preparation conditions, such as hydrothermal time, calcination temperature, adding surfactant, were studied in the performance of NiO film for electrocatalytic decomposition of urea. Through the composition and morphology characterization such as XRD, XPS, SEM, TEM as well as electrochemical tests like CV, LSV, Tafel curves and EIS of NiO film, The results show that the electrocatalytic decomposition potential of NiO thin film electrode is reduced from 0.60 V to 0.36 V compared with the reported nickel foam electrode material at the optimum hydrothermal temperature of 12 h, calcined at 300 ℃ and EDTA with the structure directing agent.