Hydrodynamics with heated microelectrodes.
Voltammetry with continuously heated microelectrodes yields well-defined sigmoidal current-voltage curves. Unlike hydrodynamic electrodes, the surface temperature of a heated electrode can be adjusted arbitrarily within a certain range. Inside a thermal layer, a virtually stagnant diffusion layer of constant thickness delta(diff) exists. delta(diff )is independent of temperature within a certain range. On the basis of this theory, equations are derived which play a similar role to, for instance, the Levich equation for the rotating disk electrode. Reasonable agreement of the derived relationship with the results from voltammetric experiments is obtained.
Gründler
Peter
P
Fachbereich Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18051, Rostock, Germany. peter.gruendler@chemie.uni-rostock.de
Beckmann
Andreas
A