Electrically heated cylindrical microelectrodes.: Electrochemical measurements in THF

An improved electrode design to perform electroanalytical measurements in organic solutions at elevated temperatures was constructed. In this method, a thin platinum wire is directly heated by ac current and an electrochemical signal at this wire is measured simultaneously. The electrode temperature in THF was determined by investigating the open circuit potential of the redox couple ferrocene\ferrocenium. The heating effects are demonstrated by cyclovoltammetric measurements of ferrocene at different scan rates and temperatures. The observed mass transport limiting current values strongly depend on the temperature. The quality of the measurements was examined using an Arrhenius plot. (C) 1999 Elsevier Science S.A. All rights reserved.