摘要
采用循环伏安等测试方法,以铂微盘电极为工作电极,研究了硝基甲烷在离子液体1-正丁基-3-甲基咪唑四氟硼酸盐(BMImBF_4)中的电化学行为,并探讨了温度和扫描速率等因素对硝基甲烷电化学特性的影响.实验结果表明,硝基甲烷在离子液体BMImBF_4中的还原反应是受扩散控制的不可逆过程.估算了不同温度下硝基甲烷在离子液体BMImBF_4中的扩散系数D,进而求得它的扩散活化能E_(?)约为39.5 kJ·mol^(-1).
The electrochemical reduction of nitromethane was investigated in the room temperature ionic liquid 1- butyl-3-methylimidazolium tetrafluoroborate （BMImBF4） on a Pt disk microelectrode. The influences of temperature and scan rate on the electrochemical characteristics of nitromethane were also investigated by using cyclic voltammetry. The results showed that the electroreduction of nitromethane in BMImBF4 was an irreversible process with one electron transferred, which was controlled by diffusion. Steady-state limiting currents for the electroreduction of nitromethane in BMImBF4 at various temperatures were obtained. The diffusion coefficient was increased with temperature due to the diminution of the BMImBF4 viscosity. In terms of Arrhenius equation, the activation energy （Ea） of diffusion of nitromethane in BMImBF4 was calculated to be 39.5 kJ.mol^-1
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2007年第11期1719-1722,共4页
Acta Physico-Chimica Sinica
基金
国家基础研究重大项目前期研究专项基金(2003CCA01300)
国家自然科学基金(20376074)
浙江省自然科学基金(Y406381)资助项目
