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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Autocatalysis in the open circuit interaction of alcohol molecules with oxidized Pt surfaces

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Batista, Bruno C. [1] ; Sitta, Elton [1] ; Eiswirth, Markus [2] ; Varela, Hamilton [1]
Total Authors: 4
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[2] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin - Germany
Total Affiliations: 2
Document type: Journal article
Source: Physical Chemistry Chemical Physics; v. 10, n. 44, p. 6686-6692, 2008.
Web of Science Citations: 16

We studied the open circuit interaction of methanol and ethanol with oxidized platinum electrodes using in situ infrared spectroscopy. For methanol, it was found that formic acid is the main species formed in the initial region of the transient and that the steep decrease of the open circuit potential coincides with an explosive increase in the CO(2) production, which is followed by an increase in the coverage of adsorbed CO. For ethanol, acetaldehyde was the main product detected and only traces of dissolved CO(2) and adsorbed CO were found after the steep potential decay. In both cases, the transients were interpreted in terms of (a) the emergence of sub-surface oxygen in the beginning of the transient, where the oxide content is high, and (b) the autocatalytic production of free platinum sites for lower oxide content during the steep decay of the open circuit potential. (AU)

FAPESP's process: 06/01088-5 - Electrooxidation of ethylene glycol on nickel: kinetics and dynamic instabilities
Grantee:Elton Fabiano Sitta
Support type: Scholarships in Brazil - Master
FAPESP's process: 07/01575-6 - Electrocatalysis using ionic liquids
Grantee:Bruno Carreira Batista
Support type: Scholarships in Brazil - Master