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The Adsorption of Pyrrole on Silver and Gold Electrodes as Studied with Surface Enhanced Raman Spectroscopy SERS*

The adsorption of pyrrole on polycristalline silver and gold electrodes from neutral and acidic electrolyte solutions has been studied using electrochemical methods (tensammetry) and Surface Enhanced Raman Spectroscopy. In case of the silver electrode a partially reversible physisorption is found, the adsorbed molecules are oriented flat and edge-on with respect to the surface at all concentrations. On the gold electrode at all concentrations in acidic as well as in neutral solutions edge-on orientation prevails.