Topics

•Customizing the File Toolbar

•Commands in the Tab Windows of the Ribbon Bar

•Commands in the Tab Help of the Ribbon Bar

•Changing the background color of the Client Area

•Opening an experimental Document when the potentiostat is not connected to the computer

•Opening an existing DigiElch 7 - Project (*.dep) File

•Loading an existing "old-style" DigiElch 6 Document File

•Saving  a DigiElch 7 Document File

Topics

•Defining and modifying a mechanism

•Modifying simulation parameters

•Running a simulation

•Clipboard commands: Copy, Paste

•Display commands: Zoom, Unzoom, Refresh Screen, Next, Previous

•Commands: Edit, Duplicate, Run, Circles, Filled Circles, Min/Max Info, Next Scan Segment

Topics

•Customizing the Options provided in the Properties-Window

Topics

•Showing concentration profiles for a completed simulation

•Running the Adaptive Grid Simulator to get smooth concentration profiles

•Adjusting the speed with which the concentration profiles are drawn

•Setting a break-point to pause the drawing of the concentration profiles at a predefined potential

•Exporting concentration profiles referring to the potential value where the simulation was paused

•Exporting surface concentration simulated before the simulation was paused

•Changing the default color with which the concentration profile is plotted

Topics

•Showing surface concentrations profiles for a completed simulation

•Adjusting the speed with which the surface concentrations are drawn

•Setting a break-point to pause the drawing of the surface concentrations at a predefined potential

•Exporting surface concentrations referring to the potential value where the simulation was paused

•Changing the default color with which the surface concentration of a particular species is plotted

•Selecting the distance from the center of the electrode for which the surface concentrations are drawn in the case of a 2D-simulation (disc or band electrode)

•Running a simulation for a charge transfer reaction comprising species involved in an adsorption equilibrium

•Viewing the simulated surface coverage and watching how the latter is changing for the individual species in the course of the simulation

Topics

•Creating and Running a Data Fitting Project having the experimental CVs stored in use-file format.

•Import of use-files

•Defining mechanism and starting parameters

•Selecting parameters for being optimized by the fitting procedure

•Running the fitting procedure

•Viewing info such as standard deviation and the currently used parameter set while fitting procedure is running

Topics

•Creating and Running a Data Fitting Project having the experimental CVs stored in a third-party ASCII-file format (txt, dat, etc.).

•Defining a template mechanism used for importing the experimental data

•Customizing the import filter with respect to the structure of the ASCII files which are to be imported

•Importing experimental target curves

•Modifying parameters which are not imported from the ASCII files or which are different from those in the template mechanism

•Defining the final mechanism and the starting parameters

•Selecting parameters for being optimized by the fitting procedure

•Running fitting procedure

•Viewing info such as standard deviation and the currently used parameter set while fitting procedure is running

Topics

•Creating and Running a Data Fitting Project using simulated CVs as target curves.

•The scenario shown in the video clip is the following one:

oSimulated CV are used to mimic real experimental CVs  for a simple charge-transfer mechanism measured at a disk electrode of 1 mm diameter without IR-compensation. The uncompensated ohmic resistance is assumed to be Ru = 300 Ohm.

oThe simulated CVs are used then as target curves in a data fitting project but the experimental parameters associated with each curve were modified in such a way that the curves pretend to refer to experiments not containing any IR-drop.

oIt is investigated then which combination of CT-parameters and diffusion coefficient is found by the fitting procedure to compensate the neglected IR-drop in the best possible way.

oIn the next step the experimental parameters associated with each curve are modified in such a way that the fitting procedure is going to approximate a "real" (two-dimensional) disk electrode by a equally-sized planar electrode for which only the diffusion perpendicular to the electrode surface is taken into account. (Such an approximation might be necessary in the case of complex mechanisms comprising several second-order chemical reactions where 2D-simulations can become very time consuming.)

oThe parameter errors effected by such an approximation are investigated again.

Topics

•Running a series of FT-CV simulations for an EC-mechanism

•Changing the plotting options

•Exporting the FT-CV simulations to the RAM-Disk

•Re-Importing the FT-CVs to use them as target curves in a Data Fitting Project

•Defining the starting parameters for the fitting procedure and selecting the parameters to be optimized

•Run data fitting by fitting the total AC + DC current

•Rerun data fitting by fitting the second harmonic AC current component

•Rerun data fitting by fitting the envelope of the third harmonic AC current component

Topics

•Running a (multi-sine) impedance simulation for a second-order catalytic mechanism

•Run a second simulation using a different frequency range

•Activate next or previous simulation

•Modify options for displaying impedance data

•Modify the default impedance signal by using a multi-sine composed of less than 15 frequency components

•Plot Plot ZI vs. ZR, Plot Z vs. 1/sqrt(ω) or Plot cot(ϕ) vs. sqrt(ω)

Topics

•Creating and Running a Data Fitting Project having the experimental impedance data stored in use-file format.

•Import of use-files

•Defining mechanism and starting parameters

•Selecting parameters for being optimized by the fitting procedure

•Running the fitting procedure

•Viewing the optimized parameters

•Fitting ZR vs. ZI instead of ZI and ZR vs. ω-1/2

Topics

•Running a CV experiment without IR-compensation

•Running a CV experiment with automated or user-defined IR-compensated

•Commands: Edit, Copy, Paste, Duplicate

Topics

•Continuation of the experiments shown in Part 1

•Running a series of CV experiments using different scan rates

•Optimizing noise and dynamic properties of the potentiostat by modifying the CA-Speed, IE-Stability and C-Bypass Stability settings

•Conducting a CV experiment by doing an certain number of accumulations.

Topics

•Continuation of the experiments shown in Part 1 and 2.

•Performing background correction for the experimental CVs measured in Part 2

•Evaluating the background-corrected CVs by Data Fitting

•Showing a comparison of simulated and experimental CVs on the Tabbed Window: Compare Curves