Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system

The electroadsorption of sulphide species on gold and the growth of sulphur multilayers have been investigated by optical and electrochemical techniques in sodium tetraborate buffer as the supporting electrolyte (pH 7.0 and 9.2) at 25°C. Differential reflectance spectra indicate that the adsorption...

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Detalles Bibliográficos
Autores principales: Lezna, Reynaldo Oscar, Tacconi, Norma R. de, Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1990
Materias:
Ciencias Exactas
Química
Sulfuros
Técnicas Electroquímicas
Sodio
Electrólitos
Hidrógeno
Cinética química
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87845
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87845
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Sulfuros
Técnicas Electroquímicas
Sodio
Electrólitos
Hidrógeno
Cinética química
spellingShingle Ciencias Exactas
Química
Sulfuros
Técnicas Electroquímicas
Sodio
Electrólitos
Hidrógeno
Cinética química
Lezna, Reynaldo Oscar
Tacconi, Norma R. de
Arvia, Alejandro Jorge
Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system
topic_facet Ciencias Exactas
Química
Sulfuros
Técnicas Electroquímicas
Sodio
Electrólitos
Hidrógeno
Cinética química
description The electroadsorption of sulphide species on gold and the growth of sulphur multilayers have been investigated by optical and electrochemical techniques in sodium tetraborate buffer as the supporting electrolyte (pH 7.0 and 9.2) at 25°C. Differential reflectance spectra indicate that the adsorption of sulphide begins inside the hydrogen evolution reaction (HER) region. The HER is catalysed by the presence of sulphide species on the electrode. During the growth of sulphur multilayers, soluble polysulphide species can be optically detected either as intermediates under diffusion-controlled kinetics or as products of a chemical reaction between sulphide ions and the deposited sulphur layer. The steep fall in the integral reflectance at 0.4 V (vs. SHE) is interpreted through the incorporation of light-absorbing polysulphides into the structure of the deposited sulphur layer.
format Articulo
Articulo
author Lezna, Reynaldo Oscar
Tacconi, Norma R. de
Arvia, Alejandro Jorge
author_facet Lezna, Reynaldo Oscar
Tacconi, Norma R. de
Arvia, Alejandro Jorge
author_sort Lezna, Reynaldo Oscar
title Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system
title_short Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system
title_full Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system
title_fullStr Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system
title_full_unstemmed Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system
title_sort modulated reflectance spectroscopy and voltammetry of the sulphide/gold system
publishDate 1990
url http://sedici.unlp.edu.ar/handle/10915/87845
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AT tacconinormarde modulatedreflectancespectroscopyandvoltammetryofthesulphidegoldsystem
AT arviaalejandrojorge modulatedreflectancespectroscopyandvoltammetryofthesulphidegoldsystem
bdutipo_str Repositorios
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