Two types of vertically adsorbed 3-pyridinecarboxylate on Au(1 1 1), Au(1 0 0) and Au(1 1 0) electrodes |
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Authors: | Yasunari Ikezawa Shun Sawamura |
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Affiliation: | Department of Chemistry, Faculty of Science, Rikkyo University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171, Japan |
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Abstract: | 3-Pyridinecarboxylic acid (3-PC) adsorbed on low index face electrodes in NaF solution were investigated using in situ Fourier transform-infrared (FTIR) spectroscopy and differential capacity measurements. Two types of vertically adsorbed 3-PC were confirmed on the electrodes, while flat-lying adsorbed species were not observed at the potentials measured. At negative potentials, 3-PC molecules adsorb vertically on the electrode via the lone pair electrons of the pyridine ring nitrogen atom, and at positive potentials, 3-PC adsorbs vertically via the two oxygen atoms of the carboxyl group. |
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Keywords: | 3-Pyridinecarboxylic acid Adsorption IRAS Single crystal Gold electrode |
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