物理化学学报 >> 1996, Vol. 12 >> Issue (07): 649-653.doi: 10.3866/PKU.WHXB19960714

研究简报 上一篇    下一篇

强碱溶液中阳极极化的玻碳电极特性

张汉昌,左孝兵,季明荣,吴守国   

  1. 中国科技大学应用化学系,中国科技大学结构成份分析中心,合肥 230026
  • 收稿日期:1995-10-19 修回日期:1996-01-17 发布日期:1996-07-15
  • 通讯作者: 张汉昌

Properties of Anodically Oxidative Glass Carbon Electrodes(GCE) in Strong Alkaline solutions

Zhang Han-Chang,Zuo Xiao-Bing,Ji Ming-Rong,Wu Shou-Guo   

  1. Department of Applied Chemistry,Center of Structure and Element Analysis,University of Science and Technology of China,Hefei 230026
  • Received:1995-10-19 Revised:1996-01-17 Published:1996-07-15
  • Contact: Zhang Han-Chang

关键词: 玻碳电极, 阳极极化, XPS, 强碱溶液

Abstract:

The surface properties of GCE treated by anodic polarization in strong alkaline solutions are makedly different from that of polished GCE. XPS results show thta more oxygenic groups as carbonyl and acid anhydride are formed on the electrode surface, the ratio of O/C increases, C1s and O1s peaks shift to higher binding energies. Moreover, the adsorptivity of the treated GCE decreases and shows no obvious adsorption for Fe2+ in H2SO4 solution. On the other hand, behaviour of the electrode reaction is also prominently improved. The background current is less, the electron transfer rate is greatly speeded up and the reverse of the electrode reaction for Fe3+/2+, Eu3+/2+ is effectively enhanced for treated GCE.

Key words: GCE, Anodic polarization, XPS, Strong alkaline solutions