Applications of Electrochemical Surface-Enhanced Raman Spectroscopy EC-SERS

Applications of Electrochemical Surface-Enhanced Raman Spectroscopy (EC-SERS) 

In this chapter some applications of electrochemical-SERS (EC-SERS) are reviewed, highlighting how potential-dependent surface spectroscopy can provide access to important information on chemical bonding, orientation and the electrochemical reaction of molecules at electrode surfaces. Such studies continue to lead to a much-enhanced understanding of interfacial structure and the mechanism of electrode reactions. The fundamental aspects of SERS are provided in Chapter 7. 

Developments in Electrochemistry Science Inspired by Martin Fleischrrumn, First Edition. 

Edited by Derek Fletcher, Zhong-Qun Tian and David E. Williams. 

Pyridine is adsorbed strongly onto several metals and has a large Raman cross-section. The frequency and relative intensity of pyridine SERS bands are very sensitive to electrode potential and to the surface properties of the metal, and for these reasons pyridine has been the most common probe molecule used in experimental and theoretical investigations aimed at broadening the application of SERS to new electrode materials and at assessing the respective roles of electromagnetic and chemical enhancement mechanisms [31, 32]. Pyridine might also be the best example to illustrate how to perform EC-SERS measurements and theoretical calculations to analyze the adsorption properties of electrochemical systems. 

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Applications of Electrochemical Surface-Enhanced Raman Spectroscopy (EC-SERS) 151 Table 8.1 SERS studies of passive metals with the Ag-on-metal approach. 

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