Numerical Simulation of an Electrochemical Flow Cell with V-Shape Channel Geometry

Abstract

The electrolyte flow profile and reactive species concentration distribution are calculated for a Scanning Flow Cell (SFC) by means of finite element method numerical calculation using COMSOL Multiphysics software. In case of a simple one-step reaction with kinetic parameters close to those of the oxygen reduction reaction the applicability of conventional Koutecky-Levich (KL) analysis for the kinetic current calculations is proved. In addition, the influence of the cell geometry, particularly the angle between inlet and outlet tubes and the tube diameter, is investigated to guide the further optimization of the method. The applicability of the kinetic analysis is demonstrated experimentally on the example of oxygen reduction reaction.

Effect of Pyrolysis Atmosphere and Electrolyte pH on the Oxygen Reduction Activity, Stability and Spectroscopic Signature of FeNx Moieties in Fe-N-C Catalysts

“…The leaching of Fe during short electrochemical cycling, performed either before or after the AST (AST performed in Ar-saturated electrolyte), is investigated in an on-line electrochemical scanning flow cell (SFC) directly connected to an inductively-coupled plasma mass spectrometer (ICP-MS), previously developed by us. [38][39][40] It is however challenging to continuously measure Fe leaching over the length of the AST, due to drift of the ICP-MS with time and need for constant recalibration. To measure 56 Fe, the ICP-MS (Perkin Elmer, NexION 350) is operated in dynamic-reaction-cell mode, using methane as the reaction gas.…”

A new electrochemical cell with a uniformly accessible electrode to study fast catalytic reactions

“…Each outlet makes an angle of 26° with the inlet, each with a diameter r o equals to 1.3 mm. We chose these parameter considering literature sample [34,35], but also because of the machining limitations of the prototype Concerning the other dimensions, We discuss below the reason behind this selected configuration.…”

Print‐Light‐Synthesis of Platinum Nanostructured Indium‐Tin‐Oxide Electrodes for Energy Research

“…Further analyses are considered with such printed electrodes as ideal platforms using, for instance, scanning flow cells that have recently been proven to be powerful screening tools with www.advmattechnol.de the possibility to extract kinetic data in a similar way as from rotating disk electrode measurements, but with much higher throughput. [30] …”