Pt电极上1,4-丁二醇吸附和氧化过程的CV和EQCM研究  

Adsorption and Oxidation of 1,4 -Butanediol on Pt Electrode Using Cyclic Voltammetry and EQCM

作　　者：王益凡[1] 

机构地区：[1]三明高等专科学校化生系,福建三明365004

出　　处：《漳州师范学院学报（自然科学版）》2003年第4期64-68,共5页Journal of ZhangZhou Teachers College（Natural Science)

摘　　要：运用电化学循环伏安(cv)和电化学原位石英晶体微天平(EQCM)方法研究了0.1mol·L^(-1)H_2SO_4溶液中1,4-丁二醇(1,4-BDL)在Pt电极上的吸附和氧化过程.结果表明:1,4-丁二醇电氧化行为与电极表面氧物种有着密切关系.正向电位扫描中1,4-丁二醇在Pt电极上氧化产生2个氧化电流峰,峰电位和峰电流分别为0.62V、3.87A·m^(-2)和1.00V、13.2A·m^(-2);负向电位扫描中还出现一个1,4-丁二醇氧化电流峰,峰电位和峰电流为0.39V、12.0A·m^(-2),说明1,4-丁二醇在Pt电极上氧化遵循双途径过程.本文还从电极表面质量定量变化的角度提供了1,4-丁二醇反应机理的新数据。The processes of adsorption and oxidation of 1, 4 -Butanediol on Pt electrode was studied by cyclic voltammetry and electrochemical quartz crystal microbalance (EQCM). CV curves illustrated that the oxidation of 1, 4 -Butanediol occurs in two oxidation peaks in the positive-going potential sweep and one large oxidation peak in the negative-going potential sweep. It was revealed that the oxidation of 1, 4 -Butanediol depends strongly on oxidation states of electrode surface and 1,4-Butanediol was oxidized on Pt electrode in acidic media via a dual path reaction mechanism. The EQCM studies provided quantitative results of surface mass variation during 1, 4 -Butanediol oxidation, and have thrown new light in elucidating Pt electrode surface towards 1,4 -Butanediol oxidation.

关 键 词：铂电极 1 4-丁二醇 吸附 电化学循环伏安法 电化学原位石英晶体微天平法 电催化氧化 

分 类 号：O623.413[理学—有机化学] O646.54[理学—化学]