复合金属氧化物Sn-Sb-Mn/陶瓷粒子电极体系的电催化性能

通过热分解法制备了复合金属氧化物Sn-Sb-Mn/陶瓷粒子电极, 分别采用扫描电子显微镜(SEM)、能量色散X 射线能谱(EDS)、X射线衍射(XRD)和N2吸附-脱附等技术对电极的形貌、晶相组成、比表面积和孔径分布进行了表征. 考察了该三维粒子电极系统的析氧特性, 采用循环伏安法分析了三维系统的电催化性能, 并且进行了电化学催化降解苯酚的试验. 结果表明, 制备的陶瓷粒子电极涂层比表面较大、孔结构发达, 有利于电催化反应; 电催化降解主要发生在电化学析氧区; 粒子电极系统对苯酚降解作用显著, 明显高于二维电极系统, 苯酚的去除率为92.3%, 总有机碳(TOC)的去除率为66.7%. 研究结果表明, 该三维粒子电极系统具有优良的电催化性能.

Electro-Catalytic Performance of Composite Oxide Sn-Sb-Mn/Ceramic Particle Electrode System

Sn-Sb-Mn/ceramic particle electrodes were prepared by a thermal decomposition technique. The morphology, crystal phase composition, BET surface area and pore size distribution of the electrodes were characterized by means of scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and N2 physical adsorption techniques, respectively. The properties of oxygen evolution at the three-dimensional electrode system were studied and the electrocatalytic property was investigated by cyclic voltammetry. The electrochemical degradation of artificial phenol wastewater was conducted in a multi-electrode reactor. Results showed that the catalytic layer of as-prepared ceramic particle electrodes had large BET surfaces and abundant micropores, which were beneficial for the electrocatalytic reaction. Results also indicated that the electrocatalytic degradation occurred where oxygen evolution took place. The multi-electrode system was far better at degrading phenol than a two-dimensional electrode system. The removal ratio of phenol and total organic carbon (TOC) were 92.3% and 66.7%, respectively. This study demonstrates that a three-dimensional electrode system exhibits excellent electrocatalytic performance.