不同介质中甲醇在Pt电极上氧化特征  

Studies on Adsorption and Oxidation of methanol at Pt Electrodes

作　　者：林进妹[1] 许颜清[1] 陈志先[1] 林爱兰[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：《漳州师范学院学报（自然科学版）》2003年第1期74-77,共4页Journal of ZhangZhou Teachers College（Natural Science)

基　　金：福建省教委科研基金资助项目(K2001101);漳州师院科研基金项目(SK0007; SK0014)

摘　　要：运用电化学循环伏安技术研究了Pt电极上不同浓度的甲醇在不同介质中的吸附和氧化行为. 结果表明, 甲醇的电氧化过程与溶液酸碱性和甲醇的浓度有着密切的关系; 不同的介质中, 甲醇电催化氧化活性的顺序为: 酸性 > 中性 > 碱性; 在浓度为10 M甲醇氧化的CV曲线上, 首次观测到甲醇氧化在负向电位扫描中出现两个氧化峰; 并指出甲醇电催化氧化是通过解离吸附产物和反应中间体双途径机理进行的.The processes of adsorption and oxidation of methanol at Pt electrode were studied by using Cyclic voltammetry. The experimental results demonstrated that the oxidation of methanol is closely relative to solution acidity and its content; The electrocatalytic activity of methanol at different mediums was in a sequence of acidity >neutrality > alkaline; Two oxidation peaks were observed for the first time in 0.1 M H2SO4 with 0.1 M CH3OH solution; and that CH3OH was oxidized via a dual path reaction mechanism.

关 键 词：电化学循环伏安法 PT电极 甲醇 氧化特征 吸附过程 燃料电池 电催化氧化 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O646.54[理学—物理化学]