不同基体材料的载钯修饰电极的制备及比较

以玻碳板、钛网和泡沫镍为基体材料,通过电沉积法制备载钯催化电极,对比研究基体材料对电极电催化活性的影响.循环伏安测试表明,Pd/GC电极、Pd/Ti电极和Pd/foam-Ni电极的氢吸附峰值分别为-23.46 mA、-59.57 mA和-60.53 mA.扫描电镜分析表明,基体材料影响钯在电极表面的沉积形态,GC板表面呈菱形块状,Ti网表面呈现针状结构,foam-Ni表面呈绒毛状.多孔foam-Ni及Ti网比表面积较大,Pd沉积后拥有更多的催化位点,增强了电极的电催化性能,增大了电极的脱氯潜能.

Preparation and Comparison of Palladium-loaded Electrodes on Different Substrate Materials

Glassy carbon,meshed Ti and foam-Ni were used as substrate materials and palladium-loaded electrodes were prepared by the electrochemical deposition.The effects of substrate materials on electrocatalytic activity were studied.Cyclic voltammetry results revealed that the hydrogen adsorption peak current value on Pd/GC electrode,Pd/Ti electrode and Pd/foam-Ni electrode were-23.46 mA,-59.47 mA and -60.53 mA,respectively.Scanning electron microscope images indicated that the substrate material had an important effect on the codeposited configuration of Pd on electrode surface.The surface of Pd/GC electrode was rhombus configuration,the surface of Pd/Ti electrode was needle-shaped,and that of Pd/foam- Ni electrode was floss film.With lacunaris configuration,foam-Ni and meshed Ti substrate materials possessed larger surface.After the deposit of Pd,more catalytic sites were obtained,and then it could improve the electrocatalytic activity of the electrodes,and make the electrode show a cheerful prospect in electrochemically reductive dechlorination.