酸性介质中硫脲及衍生物在纯铁上的吸附作用  

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

作　　者：董俊华[1] 宋光铃[1] 林海潮[1] 曹楚南[1] 

机构地区：[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

出　　处：《物理化学学报》1996年第1期34-38,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金

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机上的吸附遵守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．The cathodic adsorption beheaviors of thiouxea 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.

关 键 词：硫脲 铁电极 吸附 阴极极化 

分 类 号：O647.32[理学—物理化学] O623.543[理学—化学]