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  Home > JCE Print > Journal of Chemical Education > Issues > 2000  > January  >
In the Laboratory
A Simple Numerical Procedure for the Simulation of "Lifelike" Linear-Sweep Voltammograms
Benedetto P. Bozzini
INFM-Dipartimento di Ingegneria dellŐInnovazione, Università di Lecce, v. Arnesano, I-73100 Lecce, Italy
Cover
January 2000
Vol. 77 No. 1
p. 100
Abstract
Practical linear-sweep voltammograms seldom resemble the theoretical ones shown in textbooks. This is because several phenomena (activation, mass transport, ohmic resistance) control the kinetics over different potential ranges scanned during the potential sweep. These effects are generally treated separately in the didactic literature, yet they have never been "assembled" in a way that allows the educational use of real experiments. This makes linear-sweep voltammetric experiments almost unusable in the teaching of physical chemistry. A simple approach to the classroom description of "lifelike" experimental results is proposed in this paper. Analytical expressions of linear sweep voltammograms are provided. The actual numerical evaluations can be carried out with a pocket calculator. Two typical examples are executed and comparison with experimental data is described. This approach to teaching electrode kinetics has proved an effective tool to provide students with an insight into the effects of electrochemical parameters and operating conditions.
Supplement
A simple MATLAB program for use with this approach to the numerical simulation of the current density vs potential curves in electrochemical kinetics is available.
*  Contents
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*  Citation
 Bozzini, Benedetto P. J. Chem. Educ. 2000 77 100.
*  Keywords
 Physical Chemistry; Instrumental Methods; Electrochemistry; Kinetics; Computer Assisted Instruction; Teaching / Learning Aids
*  History
 Created:
Last Updated:		 December 9, 1999
August 31, 2005
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