化工学报 ›› 2008, Vol. 59 ›› Issue (S1): 25-29.

• 表面与界面工程 • 上一篇    下一篇

[BMIM]BF4中马来酸在Pt上的电化学还原和原位红外光谱

陈声培;楼乔奇;陈燕鑫;孙世刚   

  1. 厦门大学固体表面物理化学国家重点实验室;化学化工学院化学系
  • 出版日期:2008-06-30 发布日期:2008-06-30

Electrochemical and in situ FTIRS of maleic acid reduction in[BMIM]BF4 on Pt electrode

CHEN Shengpei; LOU Qiaoqi; CHEN Yanxin; SUN Shigang   

  • Online:2008-06-30 Published:2008-06-30

摘要:

采用循环伏安法(CV)、计时电量法(CA) 和电化学原位红外反射光谱 (in situ FTIRS),从分子水平上研究了离子液体[BMIM]BF4中马来酸在Pt电极上的电化学还原过程。结果表明,[BMIM]BF4中马来酸在Pt电极上的还原是受扩散控制的准可逆过程,测得扩散系数为1.0×10-7cm2·s-1;in situ FTIRS研究发现,[BMIM]BF4中马来酸在Pt电极上的还原发生在其中的一个羧基位上,即马来酸首先获得一个电子生成阴离子自由基,随后再获得一个电子生成二价阴离子。

关键词:

室温离子液体, 马来酸, 电化学还原, 电化学原位红外光谱

Abstract:

Electrochemical reduction of maleic acid in the ionic liquid was studied by cyclic voltammetry (CV), chronoamperometry (CA) and in situ FTIR spectroscopyThe results demonstrated that the reduction of maleic acid on Pt electrode is a quasireversible process controlled by diffusionThe diffusion coefficient of maleic acid is determined to be 1.0×10-7cm2·s-1In situ FTIRS results illustrated that the reduction of maleic acid in ionic liquids occurs on the carboxylThe first step is to generate radical anions, which are reduced to aldehyde species

Key words:

室温离子液体, 马来酸, 电化学还原, 电化学原位红外光谱