Gamry DigiElch

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Electrochemical Instrumentation

Gamry DigiElch

DigiElch is a simulation programme offering a unique range of features for a wide variety of electrochemical experiments.

DigiElech enables the accurate simulation of electrochemical reactions on typical electrode geometries, thin-film electrode arrays and two-dimensional microelectrodes. The simulation can also account for the voltage drop caused by the uncompensated electrolyte resistance (iR drop) as well as the charging and discharging currents resulting from the electrochemical double layer.

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Product Description

With DigiElch, the simulation of the methods

– CyclicVoltammetry (CV)

– ChronoAmperometry (CA)

– Square Wave Voltammetry (SWV)

– Fourier-Ttransform CyclicVoltammetry (FT)

– Multi-Sine Impedance (IMP)

– ComPosed Scan voltammetry (CPS)

and with the experimental modules CV, CA, SWV, FT, IMP and CPS also enables experiments to be carried out in conjunction with a Gamry Reference 600/600+ system and a Gamry Interface 1000/1010 system.

DigiElch enables fast and accurate simulation of electrochemical currents, concentration profiles and surface concentrations for user-defined reaction mechanisms from any number of charge transfer steps and first and second order chemical reactions. Furthermore, finite and semi-finite one-dimensional diffusion processes can be simulated for the most common one-dimensional geometries and a true two-dimensional simulation can be used for two-dimensional band-band or disc-disk arrangements. If a spherical mercury drop electrode is selected, amalgam formation processes can be included in the simulation, as well as surface adsorption processes, redox catalysis reactions or third-order charge transfer reactions (concerted proton electron transfer; PCET) can be modelled with astonishing detail. Two different simulation methods can be selected for the simulations.

A fast but rigid grid simulation and a slower but adaptive grid simulation. However, the simulation can be optimised in terms of the available computer performance by parallelising several processes on multi-core processors. In addition to these options in the standard version of the DigiElch software, the professional version also allows non-linear regression strategies to be applied to several data files from experiments simultaneously and the thermodynamic and kinetic parameters to be extracted. Users of DigiSim V3 software are able to upgrade to DigiElch V8, as are DigiElch V4 software users.

With the optional potentiostat module, the DigiElch software, in both the standard and professional versions, is given hardware control capabilities via a Gamry Reference 600/600+ system or Gamry Interface 1000/1010 system for performing experiments. The measurement data obtained can be fitted immediately with DigiElch V8 because the necessary information is already included.

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Specifications

• Implicit Finite Difference Method (IFD) [1,2]

[1] – J. Electroanal. Chem. 314 (1991) 13; J. Electroanal. Chem. 338 (1992) 85; "Physical Electrochemistry: Principles, Methods and Applications," I. Rubinstein (ed.), Marcel Dekker, 1995, pp. 81;

[2] – J.S. Newman, "Electrochemical Systems," Prentice Hall, 1973, p. 414