THERMOELECTROCHEMICAL IMPEDANCES .1. A NEW EXPERIMENTAL DEVICE TO MEASURE THERMOELECTRICAL TRANSFER-FUNCTIONS

The temperature is an important parameter in electrochemical processes and thus dynamical investigations are of great significance. Frequency response analysis to a thermal perturbation must be obtained without any artefact in experimental results. We describe an experimental device allowing to control the electrode temperature with high accuracy and to obtain the thermoelectrical transfer functions partial derivative V/partial derivative T in a galvanostatic regime and partial derivative I/partial derivative T in a potentiostatic one. The electrochemical impedance, the electrode processes and characteristic parameters can be inferred from these new impedances.