Oscillatory electro-oxidation of glycerol on platinum

Author(s)

Oliveira, Cristiane P. ^[1] ; Lussari, Natalia V. ^[1] ; Sitta, Elton ^[1] ; Varela, Hamilton ^{[1, 2]}

Affiliation

^[1] Univ Sao Paulo, Inst Chem Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] Ertl Ctr Electrochem & Catalysis, Kwangju 500712 - South Korea

• Document type: Journal article
• Source: Electrochimica Acta; v. 85, p. 674-679, DEC 15 2012.
• Web of Science Citations: 12

Abstract

This paper describes the experimental study of the oscillatory electro-oxidation of glycerol on platinum under galvanostatic control. The system was investigated in both acidic and alkaline media and for different glycerol concentrations. In acidic supporting electrolyte, the oscillatory behavior is rather simple and the main features such as period, amplitude and waveform are barely affected by the glycerol concentration. A more complex picture including the presence of different temporal patterns and strong dependence with glycerol concentration emerges in alkaline medium. In both media, the composite oscillations visit two clearly discernible potential windows, and potential oscillations in alkaline media are observed only when the working electrode is kept stationary. The mechanistic implications of our findings are discussed in connection with available data obtained under close-to-equilibrium conditions. (C) 2012 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 11/07226-9 - Mapping of the oscillatory dynamics in glycerol electrooxidation in acidic media
• Grantee: Natália Lussari Vrech
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 09/07629-6 - Electrocatalysis IV: fundamental and applied aspects of electrocatalytic processes, bio-electrocatalysis and kinetic instabilities
• Grantee: Edson Antonio Ticianelli
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants
• FAPESP's process: 09/16449-1 - Kinetic instabilities in electrocatalysis: mechanism and spatio-temporal dynamics
• Grantee: Cristiane Pontes de Oliveira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral