Abstract
In recent years, a number of groups have begun using ultramicroelectrodes (UMEs) and scanning electrochemical microscopy (SECM) to study the electrochemical behaviour of room-temperature ionic liquids (RTILs). However, due to their unique physicochemical properties, such as relatively high viscosity, RTILs offer a number of very specific challenges and opportunities for electrochemists attempting to perform such measurements in these liquids. In this chapter, the effects of using RTILs for UME voltammetry and SECM are described. The chapter begins with a description of UME voltammetry and SECM in “conventional” aqueous and organic electrolytes. The origin of the unusual voltammetric and SECM responses often observed in RTILs are then described and the effects of experimental parameters on this behaviour are discussed. The fundamental and applied electrochemical insights that have come from performing UME voltammetry and SECM in RTILs are then described. As we will see, these developments range from new insights into charge transfer across liquid/liquid interfaces to kinetic measurements in solar cells.
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