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

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