In situ FTIR study of ethyl xanthate adsorption on gold, silver and copper electrodes under controlled potential

P. Tolonen (Corresponding Author), Jussi Rastas, Jaakko Leppinen

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The applicability of a spectroelectrochemical method to the problems related to flotation was studied. The object of the study was to investigate the adsorption of ethyl xanthate on gold, silver and copper surfaces. Spectra were obtained using subtractively normalized interfacial Fourier transform infrared spectroscopy, which allows potential control of electrode while recording an infrared spectrum at the electrode surface. For each metal, a good correlation exists between the spectral intensities of the product of the surface reaction and the voltammogram of the metal electrode immersed in xanthate solution. On gold, xanthate is oxidized to dixanthogen, which is then adsorbed onto the gold surface. In the case of both silver and copper, xanthate reacts with the surface in two separate steps. The first comprises chemisorption of xanthate, the result being a monolayer of metal xanthate‐like surface compound. The second, more anodic, step is the formation of multilayers of metal xanthate.

Original languageEnglish
Pages (from-to)664 - 674
Number of pages11
JournalSurface and Interface Analysis
Volume17
Issue number9
DOIs
Publication statusPublished - 1991
MoE publication typeA1 Journal article-refereed

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Silver
Gold
Copper
silver
gold
Adsorption
copper
Electrodes
Metals
adsorption
electrodes
metals
flotation
chemisorption
surface reactions
metal surfaces
Surface reactions
Chemisorption
Flotation
infrared spectra

Cite this

Tolonen, P. ; Rastas, Jussi ; Leppinen, Jaakko. / In situ FTIR study of ethyl xanthate adsorption on gold, silver and copper electrodes under controlled potential. In: Surface and Interface Analysis. 1991 ; Vol. 17, No. 9. pp. 664 - 674.
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abstract = "The applicability of a spectroelectrochemical method to the problems related to flotation was studied. The object of the study was to investigate the adsorption of ethyl xanthate on gold, silver and copper surfaces. Spectra were obtained using subtractively normalized interfacial Fourier transform infrared spectroscopy, which allows potential control of electrode while recording an infrared spectrum at the electrode surface. For each metal, a good correlation exists between the spectral intensities of the product of the surface reaction and the voltammogram of the metal electrode immersed in xanthate solution. On gold, xanthate is oxidized to dixanthogen, which is then adsorbed onto the gold surface. In the case of both silver and copper, xanthate reacts with the surface in two separate steps. The first comprises chemisorption of xanthate, the result being a monolayer of metal xanthate‐like surface compound. The second, more anodic, step is the formation of multilayers of metal xanthate.",
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In situ FTIR study of ethyl xanthate adsorption on gold, silver and copper electrodes under controlled potential. / Tolonen, P. (Corresponding Author); Rastas, Jussi; Leppinen, Jaakko.

In: Surface and Interface Analysis, Vol. 17, No. 9, 1991, p. 664 - 674.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - In situ FTIR study of ethyl xanthate adsorption on gold, silver and copper electrodes under controlled potential

AU - Tolonen, P.

AU - Rastas, Jussi

AU - Leppinen, Jaakko

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AB - The applicability of a spectroelectrochemical method to the problems related to flotation was studied. The object of the study was to investigate the adsorption of ethyl xanthate on gold, silver and copper surfaces. Spectra were obtained using subtractively normalized interfacial Fourier transform infrared spectroscopy, which allows potential control of electrode while recording an infrared spectrum at the electrode surface. For each metal, a good correlation exists between the spectral intensities of the product of the surface reaction and the voltammogram of the metal electrode immersed in xanthate solution. On gold, xanthate is oxidized to dixanthogen, which is then adsorbed onto the gold surface. In the case of both silver and copper, xanthate reacts with the surface in two separate steps. The first comprises chemisorption of xanthate, the result being a monolayer of metal xanthate‐like surface compound. The second, more anodic, step is the formation of multilayers of metal xanthate.

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