Electrochemical Evidence of Strong Electronic Interaction of PtRu on Carbon Nanotubes with High Density of Defects

Autor(es)

de Moraes, Ines Rabelo ^[1] ; Matsubara, Elaine Yoshiko ^[1] ; Rosolen, Jose Mauricio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Quim, Fac Filosofia Ciencias Letras Ribeirao Preto, BR-14040901 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ELECTROCHEMICAL AND SOLID STATE LETTERS; v. 11, n. 12, p. K109-K112, 2008.
• Citações Web of Science: 7

Resumo

We show that carbon nanotubes (CNTs) with high density of defects can present a strong electronic interaction with nanoparticles of Pt-Ru with average particle size of 3.5 +/- 0.8 nm. Depending on the Pt-Ru loading on the CNTs, CO and methanol oxidation reactions suggest there is a charge transfer between Pt-Ru that in turn provokes a decrease in the electronic interaction taking place between Ru and Pt in the PtRu alloy. The CO stripping potentials were observed at about 0.65 and 0.5 V for Pt-Ru/CNT electrodes with Pt-Ru loadings of 10 and 20, and 30 wt %, respectively. (C) 2008 The Electrochemical Society. {[}DOI: 10.1149/1.2990222] All rights reserved. (AU)

• Processo FAPESP: 06/07253-8 - Eletrodos compósitos de nanotubos de carbono de interesse para armazenagem de energia
• Beneficiário: Elaine Yoshiko Matsubara
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 04/07085-2 - Nanotecnologia de carbono aplicada ao desenvolvimento de sensores, celulas fotovoltaicas, pseudo capacitores e compositos polimericos.
• Beneficiário: Jose Mauricio Rosolen
• Modalidade de apoio: Auxílio à Pesquisa - Regular