应用化学 ›› 1990, Vol. 0 ›› Issue (2): 25-29.

• 研究论文 • 上一篇    下一篇

钛基二氧化铅电极上氯析出过程的研究

黄永昌, 陈厚龙   

  1. 上海交通大学应用化学系 上海 200030
  • 收稿日期:1989-04-06 修回日期:1989-09-26 出版日期:1990-04-10 发布日期:1990-04-10

STUDY ON THE ANODIC REACTION OF CHLORINE EVOLUTION ON Ti/β-PbO2ELECTRODE

Huang Yongchang, Chen Houlong   

  1. Shanghai Jiao-Tong University, Shanghai 200030
  • Received:1989-04-06 Revised:1989-09-26 Published:1990-04-10 Online:1990-04-10

摘要: 用极化曲线法研究了钛基二氧化铅电极(β-PbO2)在NaCl溶液中的阳极析氯过程。结果表明,反应速度与Cl-离子浓度成正比,H+离子通过OH-离子的竞争吸附对析氯过程起促进作用。电极转速对阳极极化曲线没有影响,说明扩散过程不起控制作用。稳态动力学数据指出,氯的析出机理符合电化学放电规律,速度控制步骤为:MCl-adi→MCl-adi+e。

关键词: 钛基二氧化铅电极, 氯析出反应, 动力学, 机理

Abstract: The kinetics of the chlorine evolution reaction on Ti/β-PbO2 electrode has been studiedbased on the current-potential curves using a rotating disc electrode. The reaction rate affect-ing factors, such as Cl- ion concentration and pH of the solution, have been examined, thebydrogen ions were found to promote the chlorine evolution reaction. This has been ascribedto the competitive adsorption between H2O molecules and chloride ions at the active sites ofthe electrode surface. The following parameters were determined: the anodic transfer coeffi-cient, Tafel slope, and the reaction orders with respect to Cl- and H+. From the experimental results the rate determining step of the anodic evolotion of chlorine on Ti/β-PbO2 electrode is found to be MClads-——MCladi+e

Key words: Ti-supported lead dioxide electrode, chlorine evolution reaction kinetics,mechanism