<italic>In</italic>-<italic>situ</italic> electrochemical Raman spectroscopy on ultramicroelectrodes

Abstract

<p indent=0mm><italic>In-situ</italic> electrochemical Raman spectroscopy is an important spectroelectrochemical technique. Combining ultramicroelectrodes and EC-SERS can strictly correlate the structural and chemical information in Raman spectra with the electrochemical processes on electrode surface, which enable mechanistic analysis. This article reviews the research methods and applications of <italic>in-situ</italic> electrochemical Raman spectroscopy with ultramicroelectrodes as working electrodes, and summarizes the methods of electrode preparation, and demonstrates the use of the correlation between Raman spectroscopy and electrochemistry obtained at the ultramicroelectrode in studying the surface species in the electrochemical oxidation of a single zinc particle and the electrochemical adsorption of pyridine on Au surface, and elucidating the selective photooxidation reaction of <italic>p</italic>-aminothiophenol by simultaneously measuring molecular reactions and photocurrents with high signal-to-noise ratio and sensitivity. The <italic>in-situ</italic> electrochemical Raman spectroscopy with an ultramicroelectrode as the working electrode has greatly expanded the researches of Raman spectroscopy, and is promising to be a powerful tool for studying electrochemical and photoelectrochemical reactions.