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
J. Chem. Educ., 2002, 79 (3), p 349
DOI: 10.1021/ed079p349
Publication Date (Web): March 1, 2002
History, Education, and Documentation

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.

Keywords (Audience):

Second-Year Undergraduate

Keywords (Domain):

Laboratory Instruction

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Catalysis
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  • Received: August 03, 2009

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