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Surface-enhanced Raman spectroscopic studies on silver electrodes in the presence of 2-mercaptopyrimidine

✍ Scribed by W. H. Li; B. W. Mao; Z. Q. Tian

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
446 KB
Volume
26
Category
Article
ISSN
0377-0486

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✦ Synopsis

Abstract

Surface‐enhanced Raman spectroscopy (SERS) was applied to the study of silver electrodes in the presence of 2‐mercaptopyrimidine (2MP) over a wide electrode potential range from —0.3 to —1.8 V (vs. SCE). The spectra reveal that in neutral solution 2MP was adsorbed perpendicularly on the silver electrode via its sulphur atom at potentials more positive than — 1.1 V and was electrochemically reduced at more negative potentials. The significant dependence of the SERS spectra on the solution pH and the time‐resolved SERS results suggest that hydro‐oligomerization of 2MP may take place during the electrochemical reduction process. It has been shown that SERS can be used as a unique tool to study structural changes of electrochemical interfaces through detailed molecular level analyses in the electrode potential region of hydrogen evolution.

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