2013/14 Taught Postgraduate Module Catalogue

CHEM5191M Electrochemical Methods and Devices

10 creditsClass Size: 35

Module manager: Dr R.J. Ansell
Email: R.J.Ansell@leeds.ac.uk

Taught: Semester 1 (Sep to Jan) View Timetable

Year running 2013/14

Pre-requisite qualifications

Level 3 in Chemistry with Analytical Chemistry or equivalent

Module replaces

CHEM3025 Electroanalytical Methods

This module is not approved as an Elective

Objectives

To introduce, illustrate and provide demonstrations and practice in the use of electrochemical methods and devices.

Learning outcomes
Background: Static cell, measurement of potential. Standard reduction potentials, standard hydrogen electrode, potential ladders, oxidation-reduction equilibria. Redox indicators and redox titrations. Reference electrodes for potentiometry: silver halide and calomel electrodes. Potentiometric titrations.

Potentiometric chemical sensors: The liquid-liquid junction potential. The glass electrode and H+ activity asymmetry potentials. Ion-selective electrodes; different glass varieties, liquid membrane electrodes particularly the Ca++ responsive electrode. Solid state electrodes. Gas sensors. Ion selective field effect transistors (ISFETs). Concentration determination by direct potentiometry.

Electrolytic methods: Electrogravimetry and coulometry.

The electrode-solution interface: The electric double layer. Zeta potential. The effect of current: Electrode polarisation and electrode dynamics. Chronoamperometry.

Polarography/Voltammetry: The polarography cell. The dropping mercury electrode. Diffusion current and half-wave potential. Effect of complexation of metal cations on half-wave potential. Determination of stability constants and stoichiometries of complex species. Differential methods. Stripping methods for trace amounts.
Amperometric Titrations. Cyclic voltammetry. Studies of kinetics and mechanisms.

Devices and applications: Chemically modified electrodes & conducting polymers. Amperometric chemical sensors and biosensors. Batteries and fuel cells. Photovoltaics and photoelectrochemistry.

Syllabus

- Electrochemical theory
- The use of potentiometry, voltammetry and conductance methods in chemical analysis. The electrode-solution interface
- Electrochemical devices.

Teaching methods

Delivery type	Number	Length hours	Student hours
Example Class	5	1.00	5.00
Lecture	14	1.00	14.00
Practical	2	1.00	2.00
Independent online learning hours			20.00
Private study hours			59.00
Total Contact hours			21.00
Total hours (100hr per 10 credits)			100.00

Private study

- 2 hours reading per lectures = 28 hours
- 4 hours examples class preparation = 4 hours
- 12 hours practical preparation and write-up = 12 hours
- 15 hours preparation for exam = 15 hours.

Opportunities for Formative Feedback

Progress monitored through participation in lectures, examples classes and practical sessions; online assessed work.

Methods of assessment

Coursework

Assessment type	Notes	% of formal assessment
In-course Assessment	2 online assessments	15.00
Practical	2 experiments	15.00
Total percentage (Assessment Coursework)		30.00

Normally resits will be assessed by the same methodology as the first attempt, unless otherwise stated

Exams

Exam type	Exam duration	% of formal assessment
Standard exam (closed essays, MCQs etc)	2 hr	70.00
Total percentage (Assessment Exams)		70.00

Normally resits will be assessed by the same methodology as the first attempt, unless otherwise stated

Reading list

The reading list is available from the Library website

Last updated: 07/05/2014

Disclaimer

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