Enhanced Raman spectroscopic study of the adsorption of thiocarbohydrazide on silver and copper electrode surfaces
β Scribed by B.H. Loo; J. Leahey; Y.G. Lee
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 574 KB
- Volume
- 172
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Surface-enhanced Raman spectroscopy has been used to study the surface chemistry of thiocarbohydrazide (TCH) on Ag and Cu electrodes. The TCH molecule is adsorbed on Ag and Cu surfaces through its S atom. The electrochemistry of TCH in acidic solutions is also investigated. In contrast to thiosemicarbazide, no decomposition of TCH on the Ag or Cu electrode surfaces is observed in acidic solutions. TCH is stable for a wide range of pH's and applied electrode potentials,
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Surface-enhanced Raman spectra of selenourea on copper and silver electrodes have been obtained. The frequencies of vibratioral modes involving CSe stretch for the free molecule were decreased upon adsorption, lndlcating a reduchon in the C=Sc bond order. We conclude tiat selenourea 1s Se-bonded to
## Abstract Surfaceβenhanced Raman spectroscopy (SERS) was applied to the study of silver electrodes in the presence of 2βmercaptopyrimidine (2MP) over a wide electrode potential range from β0.3 to β1.8 V (__vs.__ SCE). The spectra reveal that in neutral solution 2MP was adsorbed perpendicularly on