EL3402 Electrodics and Electrocatalysis Syllabus:
EL3402 Electrodics and Electrocatalysis Syllabus – Anna University Regulation 2021
COURSE OBJECTIVES:
• To impart necessary basic knowledge in order to understand, analyze and solve problems related to electrochemical processes.
UNIT I ELECTRICAL DOUBLE LAYER
Thermodynamics of ideally polarizable and non-polarizable interfaces- Lipman equation determination of interfacial tension, charge density, surface excess and double layer capacitance by electro capillary & bridge methods- Helmholtz, Gouy-Chapman and stern models of the double layer with discussion of potential and charge distribution inside the double layer-contact adsorption and its determination.
UNIT II ELECTRODE KINETICS
Concepts of equilibrium potential, Nernst equation, overpotential and its different types, equilibrium exchange current density-derivation of Butler-Volmer equation –high field and low field approximations – charge transfer resistance and polarizability of the interface – concepts of rate determining step, Stoichiometric number, reaction order – Determination of kinetics parameters [ io, ks,()] by Tafel and linear polarization methods.
UNIT III ELECTROCATALYSIS
Chemical catalysis and electro catalysis – comparison of electrocatalysts – electro catalysis in simple redox reactions involving adsorbed species – electronic and geometric factors in electrocatalysts -Discussion on the mechanisms of hydrogen evolution and oxygen reduction reactions.
UNIT IV ELECTROCHEMICAL TECHNIQUES I
Ion selective electrodes – Principles of potentiometry and amperometry- determination of dissolved oxygen. Linear sweep voltammetry and cyclic voltammetry derivation of Randles- Sevciks equation – effect of sweep rate-analysis of cyclic voltammograms.
UNIT V ELECTROCHEMICAL TECHNIQUES II
Potential step method (chronoamperometry) under diffusion control derivation of Cottrell equation for a planar and spherical electrode- significance of spherical diffusion – derivation of Ilkovic equation.- Chronopotentiometry and analysis of chronopotentiograms-derivation of sands equation for constant current input under linear diffusion- concepts of Faradaic impedance –derivation of kinetic parameters from impedance measurements – Nyquist and bode plots for simple redox reactions-principles of scanning probe techniques-STM-AFM and SECM – working principles of electrochemistry.
TOTAL: 45 PERIODS
COURSE OUTCOMES:
Upon completion of the course,
• Understand the concept of electrical double layer
• Understand the concept of electrode kinetics
• Understand the concept of electrocatalysis
• Understand the principles of potentiometry and amperometry
• Understand the principles of various electrochemical techniques.
TEXT BOOKS:
1. J.O.M Bockris& A.K.N. Reddy, “Modern Electrochemistry”, Vol.2, Plenum Press (Chapter 7 for unit I: Chapters 8 & 9 for unit II ; chapter 10 for unit III), 1996.
2. A.J.Bard& L.R. Faulkner, ”Electrochemical Methods Fundamentals and Applications”, John Wiley & Sons. 3nd Edition, 2001.
REFERENCES:
1. Paul Delahay, “Double Layer Structure and Electrode Kinetics”, 1965 and publication.
2. James A. Plam Beck , “Electroanalytical Chemistry – Basic Principles and Applications”, John Wiley & sons, Wiley Publication, 1982