Raman Spectra of Electrochemical Processes on Mercury Electrodes

摘要

Raman spectroscopy is a very powerful technique for characterization of materials. However, the inefficiency of Raman scattering (whic hleads to weak signals) is a major limitation for its application. The sensitivity problem is being overcome by a new generation of Raman instruments. Generally, the Raman spectra from species present in the metal-solution interphase can only be obtained when a Raman-ehancing mechanism, such as surface-enhanced Raman scattering (SERS), is operative. SERS is traditionally observed from silver copper and gold electrodes. More recently, Raman spectra have been obtained from Pt, Pd, Ph, RU, Ni, Co, and Fe~(1,2)using the new highly sensitive Raman istruments. In this work, we extend the application of Raman spectroscopy to unusual SERS substrates by presenting an in situ Raman investigation of mercury-solution interphases.