【摘 要】
：
采用循环伏安法研究了离子液体RMimBF_4中硝基苯在微铂电极上电还原动力学特性参数——传递系数a的变化规律。研究结果表明,离子液体中,硝基苯电还原过程的第2个电子转移反应
【机 构】
：
盐城工学院应用化学研究所,浙江工业大学化学工程与材料学院,
论文部分内容阅读
采用循环伏安法研究了离子液体RMimBF_4中硝基苯在微铂电极上电还原动力学特性参数——传递系数a的变化规律。研究结果表明,离子液体中,硝基苯电还原过程的第2个电子转移反应是速度控制步骤。该反应的传递系数α随硝基苯浓度增加而减小;相同浓度时,温度升高,α迅速增大。在离子液体EMimBF_4-水-硝基苯体系中,相同硝基苯浓度下,随水含量增加,α先减小,后增大。不同离子液体中,α的变化规律为:EMimBF_4>BMimBF_4>HMimBF_4。
The cyclic voltammetry was used to study the variation of kinetic parameters of the electroreduction of nitrobenzene in the ionic liquid RMimBF_4 at the micro-platinum electrode. The results show that the second electron transfer reaction of the reduction process of nitrobenzene in the ionic liquid is the speed control step. The transfer coefficient α of the reaction decreases with increasing nitrobenzene concentration; at the same concentration, the temperature increases and α increases rapidly. In the ionic liquid EMimBF_4-water-nitrobenzene system, with the same concentration of nitrobenzene, α decreases first and then increases with the increase of water content. In different ionic liquids, the variation of α was: EMimBF_4> BMimBF_4> HMimBF_4.
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