物理化学学报 >> 1996, Vol. 12 >> Issue (01): 34-38.doi: 10.3866/PKU.WHXB19960108

研究论文 上一篇    下一篇

酸性介质中硫脲及衍生物在纯铁上的吸附作用

董俊华,宋光铃,林海潮,曹楚南   

  1. 中国科学院金属腐蚀与防护研究所，金属腐蚀与防护国家重点实验室，沈阳 110015
  • 收稿日期:1995-03-28 修回日期:1995-06-12 发布日期:1996-01-15
  • 通讯作者: 董俊华

The Adsoption of Thiourea and tis Derivatives on Iron Electrode in Acidic Solution

Dong Jun-Hua,Song Guang-Ling,Lin Hai-Chao,Cao Chu-Nan   

  1. State Key Laboratory for Corrosion and Protection,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang 110015
  • Received:1995-03-28 Revised:1995-06-12 Published:1996-01-15
  • Contact: Dong Jun-Hua

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摘要：

用极化曲线方法研究了硫酸和盐酸介质中五种硫脲化合物在纯铁电极表面的阴极吸附行为．从动力学角度推出硫酸介质中硫脲在电极上的吸附遵守Temkin等温式，并参与了铁电极上的阴极析氢反应，属负催化效应. 从热力学角度证明了盐酸介质中硫脲及其衍生物在电极表面的吸附遵守Langmuir等温式，属阴极覆盖效应．

关键词: 硫脲, 衍生物, 铁电极, 吸附, 阴极极化

Abstract:

The cathodic adsorption beheaviors of thiourea and 4 of its derivatives on iron in hydrochloric acid and sulphuric acid were investigated by polarization curves. The accordance of the adsorption beheavior of thiourea on iron in sulphuric acid with Temkin isotherm was deduced from hynamics, and the thiourea took part in the reaction of HER, this phenomena is a negative catalytic effect. The adsorption beheavoris of thiourea and its 4 derivatives on iron in hydrochloric acid was found to be in accord with Langmuir isotherm and this conclusion was deduced from thermodynamics, this phenomena is a blocking effect.

Key words: Thiourea, Derivatives, Iron;Adsorption, Cathodic polarization