Electrochemical impedance Spectroscopy the complete guide in 2020

By ResearcherStore Categories: C-Science
Wishlist Share
Share Course
Page Link
Share On Social Media

About Course

Electrochemical impedance Spectroscopy

This course will introduce the electrochemical impedance spectroscopy technique and illustrate its use to characterize electrochemical processes. Details regarding the correct method of data acquisition and analysis, along with pitfalls to watch out for, will be discussed.

Week 1:  Introduction to electrochemistry, electrode-electrolyte interface, reference electrode, three-electrode cell, supporting electrolyte, the rate constant, EIS basics, electrical elements, differential impedance, time-domain results, graphical representation of impedance data in Bode and Complex plane plots, other techniques.

Week 2:   Experimental details: Instrumentation, single and multi-sine inputs, FFT details, frequency range and resolution, cross-correlation, multi sine: odd harmonics and non-harmonic choices, crest factor, spectral leakage, windowing

Week 3: Data validation: Kramers Kronig Transforms (KKT), Linearity, causality, stability, impedance vs. admittance, applications, and limitations, Alternatives – measurement model analysis and linear KKT

Week 4:  Data analysis: Electrical Equivalent Circuits, choice of circuits, confidence intervals, AIC, initial values, distinguishability, zeros and poles representation, charge transfer resistance and polarization resistance, Maxwell, Ladder, and Voigt circuits

Week 5:  Reaction mechanism analysis, linearization of governing equations, derivation of impedance expression for a simple electron transfer reaction; two-step reactions with one adsorbed intermediate

Week 6:  Reaction mechanism analysis (continued), development of impedance expression for multiple reactions, an example reaction exhibiting negative resistance, an example three-step reaction with 2 adsorbed intermediates

Week 7:  Reaction mechanism analysis (continued), development of impedance expression for a catalytic reaction exhibiting negative resistance, reactions with Frumkin isotherm practical challenges in the extraction of kinetic information, list of various patterns of complex plane plots reported in the literature

Week 8:  Diffusion effects, Warburg Impedance, finite and semi-infinite cases, effect of change in dc potential, and boundary layer thickness.

Week 9:  Constant phase elements (CPE), porous electrodes

Week 10:  Passivation and film formation, point defect model (PDM), and extensions. Description of a few selected applications of EIS: Corrosion, biosensors, fuel cells, mechanistic analysis

Week 11:  Nonlinear EIS (NLEIS), introduction, mathematical background (Taylor series, Fourier series, modified Bessel functions), NLEIS for a simple electron transfer reaction, reaction with adsorbed intermediates, Nonlinear charge transfer, and polarization resistances

Week 12:  Effect of instabilities in traditional EIS- calculation using NLEIS methodology, solution resistance effects, Detection of nonlinearities using KKT, NLEIS with Frumkin and Temkin isotherm, evaluation of related technique: electrochemical frequency modulation (EFM)

 

Join now!

Show More

What Will You Learn?

  • Learn Electrochemical impedance Spectroscopy from A to Z

Course Content

Electrochemical impedance Spectroscopy

  • Introduction to Electrochemical impedance Spectroscopy
    00:00
  • Detailed Syllabus
    00:00
  • Electrochemistry, double layer, 3 electrode systems, supporting electrolyte
    00:00
  • Rate constant, concept of impedance, Z of electrical elements, differential impedance
    00:00
  • Time domain results
    00:00
  • Graphical representation of data (Complex plane, Bode)
    00:00
  • Introduction to other techniques
    00:00
  • Assignment 01
    00:00
  • CPE
    00:00
  • Porous electrodes
    00:00
  • Films, PDM
    00:00
  • PDM
    00:00
  • Applications
    00:00
  • Warburg
    00:00
  • Warburg
    00:00
  • Warburg
    00:00
  • Bounded Warburg
    00:00
  • Patterns reported in experiments
    00:00
  • Challenges in RMA
    00:00
  • Catalytic mechanism.
    00:00
  • Simple electron transfer reaction
    00:00
  • Two step reaction with an intermediate (1 of 3)
    00:00
  • Two step reaction with an intermediate (2 of 3)
    00:00
  • Two step reaction with an intermediate (3 of 3)
    00:00
  • Examples with Frumkin or Temkin isotherms
    00:00
  • E-EAR reaction, negative resistance (1 of 2)
    00:00
  • E-EAR reaction, negative resistance (2 of 2)
    00:00
  • Three step reaction with two adsorbed intermediates
    00:00
  • Assignment 04
    00:00
  • Maxwell, Voigt, Ladder circuits, choice of initial values illustrated
    00:00
  • Zero/pole representation, Rt and Rp
    00:00
  • EEC fitting, initial values, distinguishability
    00:00
  • Introduction to EEC, Choice of circuits, confidence intervals, AIC
    00:00
  • Assignment 03
    00:00
  • Introduction to KKT
    00:00
  • Linearity, causality, stability, impedance vs. admittance, measurement model
    00:00
  • Linear KKT illustration
    00:00
  • Assignment 02
    00:00
  • Type of analyzers, single and multi sine
    00:00
  • FFT details, frequency range and resolution, cross correlation
    00:00
  • Multi sine, odd harmonic, non-harmonics, crest factor, spectral leakage
    00:00
  • Windowing
    00:00
  • NLEIS. Introduction and mathematical background
    00:00
  • Electron Transfer reaction
    00:00
  • Two step reaction
    00:00
  • Two step reaction (continued)
    00:00
  • Rt and Rp estimation
    00:00
  • Galvanostatic simulations
    00:00
  • Instabilities
    00:00
  • Solution resistance effects
    00:00
  • Detection on nonlinearities using KKT
    00:00
  • Frumkin and Temkin isotherms
    00:00
  • NLEIS Experimental aspects. FFT, PSD, THD
    00:00
  • Application – other techniques HA, EFM
    00:00
  • Answers to Assignments – 01 TO 04
    00:00
  • Answers to Assignments – 05 TO 08
    00:00

Student Ratings & Reviews

No Review Yet
No Review Yet
ResearcherStore

Want to receive push notifications for all major on-site activities?