What does the diffusion coefficient tell you?
What does the diffusion coefficient tell you?
The diffusion coefficient is the proportionality between flux and concentration gradient. The electrode area can be determined electrochemically with equations equivalent to an equation and by using a redox couple having a known diffusion coefficient.
What are the 2 variables when determining diffusion coefficient?
Diffusion coefficient depends on size and shape of molecule, interaction with solvent and viscosity of solvent.
Why does diffusion coefficient decrease?
The number density of molecules in liquid is also very much higher and their mobility is lower, which implies a much lower diffusion coefficient In solids, diffusion is still slower. If experimental data are lacking, the diffusion coefficient can be calculated.
Do you want a high or low diffusion coefficient?
The diffusion coefficient, also known as the diffusivity, describes how fast one material can diffuse through another material. The higher the diffusion coefficient, the faster diffusion will be.
What does a low diffusion coefficient mean?
What is the difference between relaxation time and diffusion coefficients?
Molecular diffusion coefficients can also be measured using NMR methods. Unlike relaxation time measurements, diffusion coefficients are whole molecule properties relating to translational motion of the molecule.
What is the diffusion coefficient of the electrode area?
The diffusion coefficient is the proportionality between flux and concentration gradient. The electrode area can be determined electrochemically with equations equivalent to an equation and by using a redox couple having a known diffusion coefficient.
What is the best way to interpret diffusion coefficients?
Diffusion coefficients are required to interpret all the data, but measured values are not available in most cases. The method of Wilke and Chang [33] represents the widely accepted standard for prediction of diffusion coefficients:
How do you measure diffusion coefficient with a ume?
For diffusion coefficient measurements with UMEs, the steady-state current is usually measured. Certain techniques, such as LSV, can only be applied to measure diffusion coefficients for nernstian systems.
