Electrochemical study of benzene on Pt of various surface structures in alkaline and acidic solutions

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Title: Electrochemical study of benzene on Pt of various surface structures in alkaline and acidic solutions
Authors: Montilla, Francisco | Morallon, Emilia | Vázquez Picó, José Luis
Research Group/s: Electrocatálisis y Electroquímica de Polímeros
Center, Department or Service: Universidad de Alicante. Departamento de Química Física
Keywords: Benzene | Platinum electrode | Oxidation | Cyclic voltammetry | FTIR spectroscopy
Knowledge Area: Química Física
Date Created: 5-Aug-2002
Issue Date: 18-Sep-2002
Publisher: Elsevier
Citation: MONTILLA JIMÉNEZ, Francisco; MORALLÓN NÚÑEZ, Emilia; VÁZQUEZ PICÓ, José Luis. "Electrochemical study of benzene on Pt of various surface structures in alkaline and acidic solutions". Electrochimica Acta. Vol. 47, Issue 27 (15 Oct. 2002). ISSN 0013-4686, pp. 4399-4406
Abstract: The electrochemical behaviour of benzene on platinum electrodes (polycrystalline and single-crystal electrodes) has been studied in acidic and alkaline solutions. In acid solutions the reduction of benzene to cyclohexane takes place in all the platinum surface structure employed, however it does not occur in alkaline media (0.1 M NaOH). In this case, the hydrogen adsorption/desorption processes displace the adsorbed benzene from the electrode surface. The oxidation of benzene is also affected by the pH of the electrolyte and also by the surface structure of the platinum electrode used. In acid solutions, this oxidation at higher potentials (1.4 V vs. RHE) yields CO2, benzoquinone and α,β-unsaturated esters or lactones, however in alkaline media carbonate anions coming from CO2 and salts of carboxylic acids have been detected by in situ FTIR spectroscopy using a platinum polycrystalline electrode. Bulk electrolysis of benzene solutions using a platinum electrode in acid and alkaline media was performed in order to confirm the results obtained by spectroscopic measurements.
Sponsor: Generalitat Valenciana (GV01-313); Ministerio de Ciencia y Tecnología (MAT2001-1007).
URI: http://hdl.handle.net/10045/7823
ISSN: 0013-4686
DOI: 10.1016/S0013-4686(02)00520-0
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/S0013-4686(02)00520-0
Appears in Collections:INV - GEPE - Artículos de Revistas

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