PHE200^TM Physical Electrochemistry Software

For a complete description of the features and capabilities of the PHE200, click here to open the PHE200 brochure.  You'll need Adobe Acrobat Reader.

The PHE200 Physical Electrochemistry Software is the electrochemical tool to perform in-depth studies of the structure of the electrode interface and the mechanisms of electrochemical reactions.  The PHE200 brings cyclic voltammetry and other recognized electrochemical research techniques to the Gamry product family. 

The PHE200 incorporates the following electrochemical techniques:

• Cyclic Voltammetry

• Linear Sweep Voltammetry

• Chronoamperometry

• Repeating Chronoamperometry

• Multiple Step Potentiostatic

• Chronopotentiometry

• Repeating Chronopotentiometry

• Chronocoulometry

• Controlled Potential Coulometry

Like most Gamry software, the PHE200 and a Gamry Potentiostat use the Framework for data acquisition and the Echem Analyst for data analysis.  Gamry electrochemical techniques, therefore, have a common look-and-feel.  Moving from one technique to another is easy.  

Cyclic Voltammetry

The data acquisition and analysis software in the PHE200 brings new flexibility and power to cyclic voltammetry, among the world’s most commonly used electrochemical techniques. Open the brochure above for complete details on Cyclic Voltammetry.

Linear Sweep Voltammetry

Linear sweep voltammetry is best described as the first portion of a cyclic voltammogram.  The Linear Sweep Voltammogram appears exactly as the initial portion of a CV from Initial E to Scan Limit 1.  All the CV parameters of the PHE200 apply in the same fashion to Linear Sweep Voltammetry.  Linear Sweep is used primarily for semi-quantitative measurement of electroactive species.  Analysis routines included in the Gamry Echem Analyst for Linear Sweep Voltammetry are the same as Cyclic Voltammetry, excluding the Delta Ep command.  

Chronoamperometry

Chronoamperometry is used to study diffusion-controlled electrochemical reactions and complex electrochemical mechanisms.  It is performed by applying an initial potential at which no faradaic reaction is occurring, then stepping the potential to a value at which the electrochemical reaction of interest takes place.  The solution is generally unstirred and the current is measured throughout the experiment. 

Repeating Chronoamperometry

For some applications such as pulse plating, electrochemists often wish to apply a square wave and monitor the current profile during each pulse.  This is the purpose of the Repeating Chronoamperometry technique.

Multiple Step Potentiostatic

The Multiple Step Potentiostatic technique allows the user to apply up to 48 different potentials to the cell and monitor the current profile during each step.  This is not a standard technique, but is used quite often to characterize an electrochemical reaction or an electrode material.

Chronocoulometry

Chronocoulometry is chronoamperometry in which the cell current is integrated to calculate charge.  The presentation of the charge allows more convenient access to certain information in the experiment.  Chronocoulometry is particularly useful for studying adsorption processes and other surface-constrained reactions such as modified electrodes.  Chronocoulometry includes decimation.  Analyses included for this technique are Min/Max, Background subtract, Fit Integrated Cottrell Equation, and Normalize by Area.

Chronopotentiometry  

Chronopoteniometry is performed by stepping from an initial current, typically zero, to some finite value and monitoring the potential vs. time.  The potential at zero current is the open-circuit potential.  When the initial electroactive species has been depleted, a transition in potential will occur.  The transition time is related to several electrochemical parameters through the Sand equation.  Chronopotentiometry includes decimation on the potential measurement.  A Limit V feature aborts the experiment if the voltage is exceeded.  

Repeating Chronopotentiometry

In Repeating Chronopotentiometry, two current values are alternately applied to the cell and the potential is sampled during each current step.

Controlled Potential Coulometry

Controlled Potential Coulometry is an electrochemical experiment in which an electroactive species is exhaustively oxidized or reduced while measuring and integrating the current.  The total coulombs accumulated during the experiment allows the calculation of the number of electrons transferred in the electrochemical reaction or the concentration.  Since Controlled Potential Coulometry is essentially a long-term chronocoulometry experiment, it utilizes the chronocoulometry analysis procedures for viewing and manipulating the data.

The PHE200^TM Physical Electrochemistry Software requires a Gamry Potentiostat to conduct experiments. 

Gamry Instruments can supply complete systems including Potentiostat and Software installed in a desktop or notebook computer. Custom computer configurations, software, training and installation are available by special order. Contact us for further details on these systems.

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Last revised on Wednesday, January 30, 2008