物理化学学报 >> 1999, Vol. 15 >> Issue (05): 462-466.doi: 10.3866/PKU.WHXB19990515

研究简报 上一篇    下一篇

氧在直接耐晒翠蓝GL修饰电极上的催化还原

潘湛昌, 曾章逸, 李琼   

  1. 广东工业大学化工系,广州 510000
  • 收稿日期:1998-06-26 修回日期:1998-10-07 发布日期:1999-05-15
  • 通讯作者: 潘湛昌

Catalytic Reduction of Oxygen on Glassy Carbon Electrode Modefied with Dyestuff Direct Light Turquoise GL

Pan Zhan-Chang, Zeng Zhang-Yi, Li Qiong   

  1. Department of Chemical Engineering,Guangong University of Technology,Guangzhou 510000
  • Received:1998-06-26 Revised:1998-10-07 Published:1999-05-15
  • Contact: Pan Zhan-Chang

关键词: 氧还原, 修饰电极, 电催化, 直接耐晒蓝GL

Abstract:

The behavior of catalytic reduction of oxygen on modified electrodes of three types are studied using cyclic voltammetry in an acidic solution. The first electrode modified with industrial dyestuff Direct Light Turquoise GL(denoted as GL) has notable catalytic activity, two reduction peaks of O2 appear on CV curve (Ep is - 0. 25 V and - 0. 40 V respectively), but its stability is poor The second electrode modified with poly(4-vinyl-pyridine) and GL shows quite good catalytic performance. Both activity and stability are much better than those of the first electrode, ip in the CV curve equals 200% of that of the lst electrode and the Ev for the first peak has shifted positively about 0. 05 V. The catalytic performance of the third electrode modified with Nafion and GL is a little bid better than that of the first electrode, but is much worse than that of the second electrode. The reason of differences in the catalytic performances of these electrodes are discussed.

Key words: Oxygen reduction, Modified electrode, Electrocatalysis, Direct light turquoise GL