Oscillatory electro-oxidation of glycerol on platinum

Autor(es)

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

Afiliação do(s) autor(es)

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

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

• Tipo de documento: Artigo Científico
• Fonte: Electrochimica Acta; v. 85, p. 674-679, DEC 15 2012.
• Citações Web of Science: 12

Resumo

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)

• Processo FAPESP: 11/07226-9 - Mapeamento da dinâmica oscilatória durante a eletroxidação de glicerol em meio ácido
• Beneficiário: Natália Lussari Vrech
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 09/07629-6 - Eletrocatálise IV: aspectos fundamentais e aplicados dos processos eletrocatalíticos, bio-eletrocatálise e instabilidades cinéticas
• Beneficiário: Edson Antonio Ticianelli
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático
• Processo FAPESP: 09/16449-1 - Instabilidades cinéticas em eletrocatálise: mecanismo e dinâmica espaço-temporal
• Beneficiário: Cristiane Pontes de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado