铂电极上甲酸吸附和氧化过程的EQCM研究  

Adsorption and oxidation of formic acid on Pt electrode using cyclic voltammetry and EQCM

作　　者：卢江红[1] 林进妹[1] 林爱兰[1] 李鲤燕[1] 黄如莺[1] 陈国良[1] 

机构地区：[1]漳州师范学院化学系,福建漳州363000

出　　处：《西北大学学报（自然科学版）》2003年第4期421-424,共4页Journal of Northwest University（Natural Science Edition）

基　　金：福建省科技三项费用资助项目(K2001101);漳州师范学院科研基金重点资助项目。

摘　　要：运用电化学循环伏安和电化学原位石英晶体微天平方法,研究了0.1mol/LH2SO4溶液中甲酸在Pt电极上的吸附和氧化过程。结果表明:甲酸电氧化行为与电极表面氧物种有着密切的关系,正向电位扫描中甲酸在Pt电极上氧化产生3个氧化电流峰,与有机小分子醇类的氧化特征不同;负向电位扫描中出现甲酸氧化电流峰,表明甲酸在Pt电极上氧化遵循双途径过程。从表面质量定量变化的角度,提供了甲酸反应机理的新数据。The processes of absorption and oxidation of formic acid on Pt electrode was studied by using cyclic voltammetry and electrochemical quartz crystal microbalance (EQCM).CV curves illustrated that the oxidation of formic acid occurs in three 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 formic acid depends mainly on oxidation states of electrode surface and formic acid 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 formic acid oxidation,and have thrown new light on elucidating Pt electrode surface towards formic acid oxidation.

关 键 词：EQCM PT电极 甲酸 电催化氧化 

分 类 号：O646.54[理学—物理化学] O433[理学—化学]