物理化学学报 >> 1994, Vol. 10 >> Issue (11): 1049-1054.doi: 10.3866/PKU.WHXB19941117

研究简报 上一篇    下一篇

锑(III)在铂电极上的欠电位沉积行为

李红, 江琳才, 蒋雄   

  1. 华南师范大学化学系,广州 510631
  • 收稿日期:1993-08-02 修回日期:1994-01-07 发布日期:1994-11-15
  • 通讯作者: 江琳才

Underpotential Deposition of Antimony(III) at a Platinum

Li Hong, Jiang Lin-Cai, Jiang Xiong   

  1. Department of Chemistry,South China Normal University,Guangzhou 510631
  • Received:1993-08-02 Revised:1994-01-07 Published:1994-11-15
  • Contact: Jiang Lin-Cai

关键词: 锑(III), 铂电极, 欠电位沉积

Abstract:

The behavior of the UPD of Sb(Ⅲ) at a platinum anode has been systematically studied using various electrochemical techniques such as potential sweep, potential step, and differential capacity in order to better understand the effects of the UPD of Sb (Ⅲ) on the electrocatalytic activity of the substrate.
Experiments show that the UPD of Sb(Ⅲ) can take place on the surface of poly crystalline platinum. The amount of the adsorbed antimony by UPD and the dissolved antimony by anodic oxidation depends upon the potential applied. At potential greater than Eeq, antimony adsorbed atoms axe formed. As the potential becomes more positive, the amounts of the adsorbed antimony atoms decrease and a complete oxidative stripping occurs at a potential greater than 0.90V.It has been found that eath antimony adsorbed atom occupies three sites of platinum.

Key words: Antimony(III), Platinum electrode, Underpotential deposition