Application notes 10 min read

Application of the bipotentiostat to an experiment with a Rotating Ring-Disk Electrode (RRDE bipot) – Application Note 7

Latest updated: August 31, 2021

Abstract

In this application note, we demonstrate the capability offered by Bio-Logic multi-channel (VMP3, VSP, SP-300, etc.) potentiostats/galvanostats to run bipotentiostat experiments with rotating ring-disk electrodes. Configured as a bistat and coupled with an RRDE, the system is a powerful tool for studying electrochemical mechanisms in solution.

 

Introduction

The aim of this document is to show the capability offered by a multichannel potentiostat (VSP-300, BP-300, VMP-3, VMP-300) to run experiments with a rotating Ring-Disk electrode system.

The SP-300 and BP-300 are two-slots potentiostats/galvanostats especially designed to work as a bipotentiostats. The bipotentiostat is mainly used in electrochemical experiments with two working electrodes in a well-defined hydrodynamic regime. The hydrodynamic regime is ensured with a rotating electrode driven by a rotating power unit. The working electrode in the electrochemical cell typically consists either of a single disk or of a ring-disk electrode. The rotating ring-disk electrode was developed by Frumkin and Nekrasov in 1959. The theoretical description of the electrochemical kinetics at a rotating ring-disk electrode was definitely achieved in 1971 [1]. The applications of the RRDE are numerous in the fields of electrochemical analysis, especially in reaction mechanism studies. The rotating electrode is often used for the detection of short life intermediate species.

 

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