化学学报 ›› 2000, Vol. 58 ›› Issue (12): 1670-1673. 上一篇    下一篇

研究论文

按逆向而行的思路研究硫酸溶液中铁的电化学振荡

赵世勇;张波;马厚义;陈慎豪   

  1. 山东大学化学系.济南(250100)
  • 发布日期:2000-12-15

A study of designed current oscillations of Fe in H~2SO~4 solution

Zhao Shiyong;Zhang Bo;Ma Houyi;Chen Shenhao   

  1. Shandong Univ, Dept Chem.Jian(250100)
  • Published:2000-12-15

以发生电化学振荡为导向,设计可能引起振荡的化学与物理环境,由实验反向验证振荡机理,从而揭示金属电化学振荡的本质,这就是逆向而行的思路。本文通过改变Fe/H~2SO~4溶液界面附近溶液的pH,Fe^2^+浓度等因素,人为地促进或阻碍Fe(OH)~2膜或Fe~3O~4膜的生成与溶解,创造可能发生电化学振荡的外界环境,验证了有关Fe/H~2SO~4体系电化学振荡主要归因于铁电极表面Fe(OH)~2膜或Fe~3O~4膜的周期性生成与溶解的机理。这表明用逆向而行的思路研究金属的电化学振荡是可行的。

关键词: 硫酸, 铁, 电化学振荡

In this paper, chemical environment of Fe/0.5 mol·dm^-^3 H~2SO~4 system was designed according to the potentiostatic current oscillatios mechanism based on the temporal formation of Fe(OH)~2 and Fe~3O~4 films. The formation of Fe(OH)~2 and Fe~3O~4 films were promoted or inhibited through changing the pH and Fe^2^+ concentration in the interface of Fe/electrolyte. Thus the environment was created in that the current oscillations were observed. The results provide support to the potentiostatic current oscillations mechanism of Fe/0.5 mol·dm^-^3 H~2SO~4 system based on the temporal formation of Fe(OH)~2 and Fe~3O~4 films.

Key words: SULFURIC ACID, IRON

中图分类号: