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  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > March  >
In the Laboratory
A Simple Student Experiment for Teaching Surface Electrochemistry: Adsorption of Polyoxometalate on Graphite Electrodes
David Martel, Neso Sojic, and Alexander Kuhn
Laboratoire d'Analyse Chimique par Reconnaissance Moléculaire, École Nationale Supérieure de Chimie et de Physique de Bordeaux, 33607 Pessac, France
Cover
March 2002
Vol. 79 No. 3
p. 349
Abstract
We describe a very simple experiment that allows one to teach the basics of surface electrochemistry. The spontaneous adsorption of a commercially available polyoxometalate is used to modify the surface of a graphite pencil. The electrochemical properties of the unmodified and modified interface are examined by cyclic voltammetry. Valuable information about double-layer capacitance, surface coverage, the number of electrons involved, and electrocatalytic activity are extracted from the measurements, which can help to visualize the basic concepts of this very active field of research.
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CAS registry numbers and safety information, notes for the instructor, and student data forms are available.
*  Contents JCE2002p0349W.doc (Microsoft Word)
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*  Citation
 Martel, David; Sojic, Neso; Kuhn, Alexander. J. Chem. Educ. 2002 79 349.
*  Keywords
 Catalysis; Electrochemistry; Laboratory Instruction; Physical Chemistry; Surface Science
*  History
 Created:
Last Updated:		 January 31, 2002
March 16, 2005
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