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Raman spectro‐electrochemistry. I. In situ raman spectroscopic studies of the electrochemical reduction of CO 2 at lead‐impregnated PTFE‐bonded carbon gas diffusion electrodes
Author(s) -
Masheder D.,
Williams K. P. J.
Publication year - 1987
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250180603
Subject(s) - raman spectroscopy , electrochemistry , electrode , formate , formic acid , chemistry , polarization (electrochemistry) , glassy carbon , analytical chemistry (journal) , inorganic chemistry , cyclic voltammetry , organic chemistry , catalysis , physics , optics
In situ Raman spectroscopic studies of the electrochemical reduction of carbon dioxide at lead‐impregnated PTFE‐bonded carbon gas diffusion electrodes are reported. Polarization of the electrode surface resulted in the appearance of two weak bands at 2824 and 2915 cm −1 . These do not correspond to the wavenumber shifts expected for free formic acid, but they are thought to arise from the presence of a ‘free’ formate ion and the formic acid perturbed at the electrode surface, respectively. Spectral changes observed at lower wavenumber shifts on polarization of the electrodes are interpreted in terms of the reduction of lead oxide to lead.