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Use of Cassegrain System for in Situ Raman Scattering Study of Cyanide Ions on a Palladium Electrode

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The nonenhanced Raman scattering spectra from CN- ions adsorbed at the electrolyte/Pd electrode interface has been obtained with the use of a combination of a Cassegrain lens and a multichannel detector. Previously reported FT-IR spectra under similar conditions were used to help interpret the Raman-scattering results. The scattering results are explained on the basis of five bands assigned to the CN stretches. The position of these bands at 1950, 2060, 2090, 2150, and 2220 cm−1 are assigned to the covalent bond to a bridge site, covalent bond to an atop site, and ionic bond to Pd, Pd(CN)4 2-, and Pd(CN)2. This study shows that it is possible to obtain an enhancement of about 103 by use of the Cassegrain system described here.

Keywords: Raman spectroscopy; Spectroscopic techniques

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702934415372

Affiliations: IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099

Publication date: July 1, 1993

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