物理化学学报 >> 2009, Vol. 25 >> Issue (05): 840-846.doi: 10.3866/PKU.WHXB20090509

研究论文 上一篇    下一篇

复合金属氧化物Sn-Sb-Mn/陶瓷粒子电极体系的电催化性能

徐海青 刘秀宁 王育乔 王华林 孙岳明   

  1. 东南大学化学化工学院, 南京 211189; 南京赛佳环保科技有限责任公司, 南京 210004
  • 收稿日期:2008-10-15 修回日期:2009-01-16 发布日期:2009-05-04
  • 通讯作者: 孙岳明 E-mail:sun@seu.edu.cn

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

 XU Hai-Qing, LIU Xiu-Ning, WANG Yu-Qiao, WANG Hua-Lin, SUN Yue-Ming   

  1. School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China; Nanjing Sage Environmental Protection Science &Technology Co. Ltd., Nanjing 210004, P. R. China
  • Received:2008-10-15 Revised:2009-01-16 Published:2009-05-04
  • Contact: SUN Yue-Ming E-mail:sun@seu.edu.cn

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摘要：

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.

关键词: 陶瓷基粒子电极, 析氧性能, 循环伏安, 电催化降解

Abstract:

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.

Key words: Ceramic substrate particle electrode, Property of oxygen evolution, Cyclic voltammetry, Electrical catalytic degradation