Electrocatalytic oxidation of methanol: study with Pt:Mo dispersed catalysts

Autor(es)

Almir Oliveira Neto ^[1] ; Joelma Perez ^[2] ; Wilhelmin T. Napporn ^[3] ; Edson A. Ticianelli ^[4] ; Ernesto R. Gonzalez ^[5]

Afiliação do(s) autor(es)

^[1] Universidade de São Paulo. Instituto de Química de São Carlos - Brasil

^[2] Universidade de São Paulo. Instituto de Química de São Carlos - Brasil

^[3] Universidade de São Paulo. Instituto de Química de São Carlos - Brasil

^[4] Universidade de São Paulo. Instituto de Química de São Carlos - Brasil

^[5] Universidade de São Paulo. Instituto de Química de São Carlos - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 11, n. 1, p. 39-43, 2000-02-00.

Resumo

The electrocatalytic oxidation of methanol on Pt:Mo dispersed on carbon prepared using an alternative method recently developed in this laboratory was investigated. The EDX analysis confirmed that the simultaneous reduction of the precursor salts of Pt and Mo leads to the presence of these materials at the nominal composition initially calculated. The addition of Mo to Pt causes an increase of the oxidation currents, but does not improve the catalytic effect for methanol oxidation. Tafel plots for various methanol concentrations showed the presence of two slopes. On line differential electrochemical mass spectrometry (DEMS) was used to investigate the distribution of products and intermediates in methanol oxidation. (AU)

• Processo FAPESP: 97/02471-6 - A influencia da orientacao cristalografica sobre a eletrocatalise de reacoes eletrodicas.
• Beneficiário: Joelma Perez
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado