碱性介质中仲丁醇在铂电极上的吸附和电氧化  

Adsorption and Oxidation of 2-Butanol on Pt Electrode in Alkaline Media

作　　者：林珩[1] 陈碧桑[1] 林进妹[1] 陈国良[1] 

机构地区：[1]漳州师范学院化学与环境科学系,福建漳州363000

出　　处：《漳州师范学院学报（自然科学版）》2007年第3期54-58,共5页Journal of ZhangZhou Teachers College（Natural Science)

摘　　要：运用电化学循环伏安、原位FTIR反射光谱和电化学石英晶体微天平等方法研究了碱性介质中仲丁醇在Pt电极表面吸附和电氧化行为.结果表明:碱性介质中仲丁醇在Pt电极上电催活性比酸性介质的低,但其自毒化现象较不明显.目前实验条件下,原位FTIR反射光谱检测到,碱性介质中仲丁醇电氧化的最终产物是CH3CH2COCH3,反应中间体主要为CH3CH=CHCH3和CH2=CHCH2CH3.从电极表面质量定量变化的角度提供了仲丁醇反应机理的新数据.The adsorption and oxidation of 2-butanol （2-BL） on Pt electrode in alkaline media has been investigated by using cyclic voltammetry, electrochemical quartz crystal microbalance （EQCM） and in-situ FTIR spectroscopy. The experimental results demonstrate that 2-BL appears to be less active on Pt electrode in alkaline media than in acidic media, but exhibits weaker self-poisoning. The main product that is determined by FTIRS under experimental conditions might be mainly CH3CH2COCH3 and the reactive intermediates, such as CH3CH=CHCH3 and CH2=CHCH2CH3, are detected clearly. The EQCM studies provide quantitative results of surface mass changes during 2-BL oxidation and have thrown new light in the elucidating 2-BL oxidation.

关 键 词：PT电极 仲丁醇 氧化 原位FTIR反射光谱 电化学石英晶体微天平 

分 类 号：O646.54[理学—物理化学]