Electrocatalytic oxidation of oxalic and oxamic acids in aqueous media at carbon nanotube modified electrodes
| Autor: | Manuel Eduardo C Ferreira, Isabel Correia Neves, Salomé Soares, António Fonseca, Pier Parpot, José Figueiredo, Mara Pinto, Marta Ferreira, José Órfão, Manuel Fernando Pereira |
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| Přispěvatelé: | Universidade do Minho |
| Rok vydání: | 2012 |
| Předmět: |
General Chemical Engineering
Inorganic chemistry chemistry.chemical_element Multiwalled carbon nanotubes 02 engineering and technology Carbon nanotube 010402 general chemistry Electrochemistry Electrocatalyst 7. Clean energy 01 natural sciences law.invention Catalysis chemistry.chemical_compound law Nafion Oxidation Oxalic and oxamic acids Science & Technology 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Electrode Cyclic voltammetry Electrocatalysis 0210 nano-technology surface modification Carbon |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2011.11.046 |
| Popis: | 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. Support for this work was provided by the project NANO/NTec-CA/0122/2007 financed by Fundacao para a Ciencia e a Tecnologia (FCT), Portugal and FEDER, in the context of Programme COMPETE. |
| Databáze: | OpenAIRE |
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