NPTEL : NOC:Electrochemical Impedance Spectroscopy (Chemistry and Biochemistry)

Co-ordinators : Dr. S. Ramanathan


Lecture 1 - Electrochemistry, double layer, 3 electrode systems, supporting electrolyte

Lecture 2 - Rate constant, concept of impedance, Z of electrical elements, differential impedance

Lecture 3 - Time domain results

Lecture 4 - Graphical representation of data (Complex plane, Bode)

Lecture 5 - Introduction to other techniques

Lecture 6 - Tutorial 01

Lecture 7 - Type of analyzers, single and multi sine

Lecture 8 - FFT details, frequency range and resolution, cross correlation

Lecture 9 - Multi sine, odd harmonic, non-harmonics, crest factor, spectral leakage

Lecture 10 - Windowing

Lecture 11 - Tutorial 02

Lecture 12 - Introduction to KKT

Lecture 13 - Linearity, causality, stability, impedance vs. admittance, measurement model

Lecture 14 - Linear KKT illustration

Lecture 15 - Tutorial 03

Lecture 16 - Introduction to EEC, Choice of circuits, confidence intervals, AIC

Lecture 17 - EEC fitting, initial values, distinguishability

Lecture 18 - Zero/pole representation, Rt and Rp

Lecture 19 - Maxwell, Voigt, Ladder circuits, choice of initial values illustrated

Lecture 20 - Tutorial 04

Lecture 21 - Simple electron transfer reaction

Lecture 22 - Two step reaction with an intermediate (1 of 3)

Lecture 23 - Two step reaction with an intermediate (2 of 3)

Lecture 24 - Two step reaction with an intermediate (3 of 3)

Lecture 25 - E-EAR reaction, negative resistance (1 of 2)

Lecture 26 - E-EAR reaction, negative resistance (2 of 2)

Lecture 27 - Three step reaction with two adsorbed intermediates

Lecture 28 - Catalytic mechanism

Lecture 29 - Examples with Frumkin or Temkin isotherms

Lecture 30 - Challenges in RMA

Lecture 31 - Patterns Reported in Experiments

Lecture 32 - Warburg part - 1

Lecture 33 - Warburg part - 2

Lecture 34 - Warburg part - 3

Lecture 35 - Bounded Warburg

Lecture 36 - CPE

Lecture 37 - Porous electrodes

Lecture 38 - Films, PDM

Lecture 39 - PDM

Lecture 40 - Applications

Lecture 41 - NLEIS. Introduction and mathematical background

Lecture 42 - Electron Transfer reaction

Lecture 43 - Two step reaction

Lecture 44 - Two step reaction (Continued...)

Lecture 45 - Rt and Rp estimation

Lecture 46 - Galvanostatic simulations

Lecture 47 - Instabilities

Lecture 48 - Solution resistance effects

Lecture 49 - Detection on nonlinearities using KKT

Lecture 50 - Frumkin and Temkin isotherms

Lecture 51 - NLEIS Experimental aspects. FFT, PSD, THD

Lecture 52 - Application - other techniques HA, EFM