Effects of solution conditions on the surface-enhanced Raman scattering of cyanide species at Ag electrodes

Journal Article · Thu Feb 26 00:00:00 EST 1987 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100289a021· OSTI ID:6866328

Kellogg, D S; Pemberton, J E

The effect of solution pH and supporting electrolyte anion on the SERS behavior of cyanide species adsorbed at Ag electrodes is described. Signals for the nu(CN) band are observed in both acidic (pH 2) and basic (pH 11) media in ClO/sub 4//sup -/, Cl/sup -/, and SO/sub 4//sup 2 -/ supporting electrolytes. The frequency and intensity of the nu(CN) band are a function of electrode potential in all media. The potential at which the SERS signal reaches a maximum intensity is slightly dependent on the anion of the supporting electrolyte in basic media, but is a strong function of the anion in acidic media. In acid solution, HCN is adsorbed. Two unresolved bands occur in the nu(CN) region in acidic media and several possible assignments are proposed. The assignment that best explains all of the experimental data involves both end-bonded and side-bonded HCN. The effect of supporting electrolyte anion on the SERS response is explained in terms of the relative abilities of these anions to influence the self-association of HCN in the interface.

• Research Organization: Univ. of Arizona, Tucson
• OSTI ID: 6866328
• Journal Information: J. Phys. Chem.; (United States), Vol. 91:5
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CYANIDES
ADSORPTION
RAMAN SPECTRA
GOLD
SORPTIVE PROPERTIES
ANIONS
ELECTRIC POTENTIAL
ELECTRODES
ELECTROLYTES
EXPERIMENTAL DATA
INTERFACES
PH VALUE
RAMAN SPECTROSCOPY
SOLUTIONS
CHARGED PARTICLES
DATA
DISPERSIONS
ELEMENTS
INFORMATION
IONS
LASER SPECTROSCOPY
METALS
MIXTURES
NUMERICAL DATA
SORPTION
SPECTRA
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENTS
400400* - Electrochemistry