Electrocatalytic oxidation of oxalic and oxamic acids in aqueous media at carbon nanotube modified electrodes

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

M. Ferreira (Autor) Outra; M.F. Pinto (Autor) Outra; O.S.G.P. Soares (Autor) FEUP; M.F.R. Pereira (Autor) FEUP; J.J. Melo Orfão (Autor) FEUP; J.L. Figueiredo (Autor) FEUP; I.C. Neves (Autor) Outra; A.M. Fonseca (Autor) Outra; P. Parpot (Autor) Outra

Revista

Título: Electrochimica Acta

Vol. 60

Páginas: 278-286

ISSN: 0013-4686

Editora: Elsevier

Indexação

ISI Web of Knowledge - 13 Citações

ISI Web of Science

Scopus - 17 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

Outras Informações

ID Authenticus: P-002-DWR

DOI: 10.1016/j.electacta.2011.11.046

Abstract (EN): The electrochemical oxidation of oxalic and oxamic acids on multiwalled carbon nanotubes (CNT) and on monometallic (Pd and Pt) and bimetallic (Pd-Cu, Pt-Cu) catalysts supported on multiwalled carbon nanotubes was investigated using cyclic voltammetry. The electrodes were prepared by dispersion of the catalytic material on Toray carbon (CT) using a Nafion/water solution. The kinetic parameters of the reactions were determined using cyclic voltammetry. Modification of Toray carbon electrode with carbon nanotubes enables the oxidation of oxalic and oxamic acids in the solvent stability region. The highest oxidation current densities were observed for the Pt-Cu/CNT/CT electrode in 0.1 M NaCl. The oxidation potentials for both oxalic and oxamic acids in this case were lower than those observed with the CNT/CT electrode. The prepared electrocatalysts show good mechanical and chemical stability.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9