Huerta Arráez, Francisco, Morallon, Emilia, Quijada Tomás, César, Vázquez Picó, José Luis, Berlouis, L.E.A.
Potential modulated reflectance study of the electrooxidation of simple amino acids on Pt(111) in acidic media
HUERTA ARRÁEZ, Francisco, et al. "Potential modulated reflectance study of the electrooxidation of simple amino acids on Pt(111) in acidic media". Journal of Electroanalytical Chemistry. Vol. 489, Issues 1-2 (28 July 2000). ISSN 0022-0728, pp. 92-95
URI: http://hdl.handle.net/10045/2702
DOI: 10.1016/S0022-0728(00)00202-3
ISSN: 0022-0728
Abstract: 
The electroreflectance (ER) technique has been applied to the study of the electrooxidation of some simple amino acids (glycine, serine and alanine) on a Pt(111) surface in acid medium. A different behaviour in the (1:R)(#R:#E) response as a function of
applied potential has been observed during the positive and negative scans as consequence of the formation of adsorbed cyanide originating from the oxidation of glycine and serine. Alanine on the other hand does not readily form significant amounts of
adsorbed cyanide on the first oxidation cycle. The integrated ER spectra (ΔR:R) of the three amino acids have also shown that
the reversible adsorption of the glycinate, serinate and alaninate anions is initiated at ca. 0.35 V and reaches maximum coverage
at ca. 0.7 V. This reversible adsorption produces changes in the reflectivity comparable to that displayed by bisulphate adsorption.
Keywords:Electroreflectance, Low index crystal surfaces, Amino acids, Platinum
Elsevier
info:eu-repo/semantics/article