Elektrochemistry up to 200bar

Table of Contents

Electrochemical syntheses are becoming increasingly popular and the applied voltage represents an environmentally friendly alternative to special redox reagents. The applied voltage is used to induce special reactions depending on the standard potentials of the reactants.

Typically, 3 electrodes (cathode, anode and reference electrode) are required, which must be mounted in the reactor lid with electrically insulating feedthroughs in a pressure-resistant manner. Berghof has designed its own PEEK fittings for this purpose, which can be adapted to different electrode diameters. The choice of electrode material is therefore free. Alternatively, Conax feedthroughs can be installed.

With such a 3-electrode arrangement, the current and cell voltage between the working and counter electrodes can be measured. Which electrode acts as the working electrode depends on the reaction. The cathode is the working electrode for reductions and the anode for oxidations. A reference electrode is also required to measure and control the electrode potential.

Beispiel: Kolbe Elektrolysis

Anode: 2 R-CO2-  à R-R + 2 CO2  + 2 e-
Kathode: 2 H2O + 2 e- à 2 OH- + H2