涂膏热解法制备钛基Sn、Sb氧化物电极

Preparation and Properties of Ti/ Sn、Sb Oxide Electrode by the Paste coating Method

研究了涂膏热解法制备Ti/Sn、Sb氧化物电极的新工艺,考察了SnCl4、SbCl3加入量和烧结温度对电极寿命和析氧电位的影响,并对电极进行了SEM、EDS、XRD测试.结果表明,在涂层厚度相近时,涂膏法制备的电极与热解法相比,具有表面氧化物分布均匀和TiO2不易裸露的优点,从而提高了析氧电位,延长了电极寿命,使电极具有很高的电催化活性和电化学稳定性.

The paste-coating method is a modified method of coating-pyrogenation. In this new method, Ti-substrate electrode coated by oxides is covered with paste of Sn Sb hydroxide to decrease the volatilization of the coating component. The preparation conditions for Ti/Sn Sb oxide electrode by the paste-coating method are investigated. The effect of the amount of SbCl3 added and the sintering temperature on the electrode lifetime and oxygen evolution potential are investigated with EDS, SEM and XRD analysis. The results indicate that the electrode prepared by coating-pyrogenation appears some exposure of TiO2 due to inhomogeneous distribution of coating oxides on its surface, while the one prepared by paste-coating method enhances homogeneity for the same coating thickness. As a result, the electrode exhibits a higher oxygen evolution potential and has a longer lifetime for its higher electro-catalytic activity and the electrochemical stability.