制备方法对稀土Gd掺杂SnO_2/Sb电催化电极性能的影响

Effect of Preparation Method on Electrocatalysis of Rare Earth Gd Doping SnO_2/Sb Electrode

分别采用浸渍法、溶胶-凝胶法,SnCl4.5H2O,Sb2O3和Gd(NO3)3为原料,制备了稀土Gd掺杂SnO2/Sb涂层电催化电极.以苯酚为目标有机物,考察了电极的电催化氧化性能,初步探讨了电极结构与电催化特性之间的关系.采用SEM,XRD,XPS和EDX等手段对不同方法制备电极的表面形貌、晶体结构、电极表面涂层的元素化学结合态及元素组成进行了表征与分析.结果表明,溶胶-凝胶法制备的电极为纳米涂层电极,表面裂纹较少,晶体发育完全,有利于SnO2,Gd2O3和吸附氧的表面聚集,进而提高了电催化电极的性能.

With SnCl_45H_2O, (Sb_2O_3) and (Gd(NO_3)_3) as the raw material, the SnO_2/Sb DSA electrodes doped Gd were prepared by Dip coating method and sol-gel method. Taking phenol as model substrate, the (electro-catalytic) characteristics of prepared anodes and the relationship between the electro-catalytic ability and the electrodes structure were investigated. The micrographs, the crystal structure, the chemical environments of elements and element content on the surface of electrodes were analyzed by SEM, XRD, XPS and EDX. Results illustrated that the size of (SnO_2) crystal particle prepared with sol-gel method is owing to nanometer-size. The crystal particle of electrodes surface was integrity and the cracks on the electrode surface were very few and small. Sol-gel method is benefit to come together of the amounts of SnO_2, Gd_2O_3 and the oxygen (vacancy) in (SnO_2) crystal lattice, and resulting in the variation of (electro-)catalytic characteristics of DSA (electrodes.)