Electrochemistry in room temperature ionic liquids: A review and some possible applications
Electrochemistry in room temperature ionic liquids: A review and some possible applications
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DOI：
10.1524/zpch.2006.220.10.1247
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发表时间：
2006-01-01
影响因子：
2.5
通讯作者：
Compton, Richard G.
中科院分区：
文献类型：
--
作者：
Silvester, Debbie S.;Compton, Richard G.
对离子液体中的电化学进行了回顾，突出了一些特殊的例子，目的是比较在RTILs中观察到的与在传统溶剂中观察到的任何相似性和差异性。讨论了卤化物和水等杂质对RTILs的电化学窗口和粘度的影响。将质量传递、非均相电子传递动力学和双层电容等基本电化学研究与传统溶剂中的类似研究进行了比较，并考虑了RTILs作为电化学实验溶剂的适用性。综述了RTILs在气体传感器中作为传统溶剂替代品的应用，重点介绍了RTILs对以下气体（氧气、氧气和二氧化碳的混合物以及氨）的电化学观察。RTILs的低挥发性和高热稳定性使其有利于在极端条件下开发鲁棒传感器。最后，讨论了RTILs作为电合成溶剂的可能性，重点讨论了两个例子：电生成的溴与环己烯的反应性，以及4-硝基苯酚的还原。很明显，RTILs在电化学领域有能力提供许多优于传统溶剂的优势。
A review of electrochemistry in ionic liquids is presented, highlighting some particular examples, with the aim to compare any similarities and differences observed in RTILs to that observed in conventional solvents. The presence of impurities such as halide and water on the electrochemical window and viscosity of RTILs is discussed. Some fundamental electrochemical studies relating to mass transport, heterogeneous electron transfer kinetics and double-layer capacitance are compared to similar studies in conventional solvents, and the suitability of RTILs as solvents in electrochemical experiments is considered. The application of RTILs as replacements for conventional solvents in gas sensors is reviewed, focussing on the electrochemistry observed in RTILs for the following gases: oxygen, a mixture of oxygen and carbon dioxide, and ammonia. The low volatility and high thermal stability of RTILs renders them advantageous for the development of robust sensors under extreme conditions. Finally, the possibility for use of RTILs as solvents in electrosynthesis is discussed, focussing on two examples: the reactivity of electrogenerated bromine with cyclohexene, and the reduction of 4-nitrophenol. It is obvious that RTILs have the ability to offer many advantages over traditional solvents in the field of electrochemistry.