Cellvalidating example

Posted by / 14-Dec-2017 12:36

The WE compartment of the cell consists of a 0.5 mm diameter inlet nozzle and four 1 mm diameter outlet channels machined in a polyether ether ketone (PEEK) part placed 0.5 mm above the surface of the electrode embedded in a second PEEK part.

A notable advantage is their ability to perform localized electrochemical measurements, thus greatly increasing throughput for the combinatorial screening of catalysts.Especially for the latter two, a defined transport of reacting species in the electrolyte to the electrode surface is crucial.In both fields, rotating electrodes such as the rotating disk electrode (RDE) and the rotating cylinder Hull cell (RCH), respectively, have been the standard tool for electroanalytical investigations, due to their well-established mass transport conditions.The distance between nozzle and electrode (i.e., the cell height) is fixed at 0.5 mm by spacers machined directly into the fluidic PEEK part of the cell, independent from O-ring compression.While several designs of the electrochemical flow cell suitable for different substrate sizes are in operation, the calculations presented herein are based on a design with a 9.25 mm O-ring inner diameter and a corresponding wetted area of approx. (1) Inflow from tube-in-tube (de)aeration system, (2) outlets, (3) RE compartment, (4) CE compartment, (5) WE compartment with O-ring sealing and top-contact to copper plate.

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Additionally, a tube-in-tube (de-) aeration system (based on devices applied in flow synthesis used for polarization experiments in different dissolved gas concentrations.

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