Effect of functionalized carbon as Pt electrocatalyst support on the methanol oxidation reaction

resumo

FTIRS and XPS spectra showed that after oxidative treatments using H2SO4 + HNO3 and HNO3 solutions the Vulcan XC-72R carbon support has been found to be more hydrophilic and richer in oxygen-containing functional groups. Consequently, the Pt electrocatalyst prepared on those functionalized carbon materials further to having good dispersion of metal presented a significant improvement of the electrocatalytic activity due to the synergistic effect between the metal nanoparticles and oxygenated groups on functionalized carbon. (C) 2010 Elsevier B.V. All rights reserved.

palavras-chave

FUEL-CELL APPLICATIONS; ACTIVATED CARBON; PARTICLE-SIZE; NITRIC-ACID; PLATINUM CATALYSTS; PT/C; ELECTROOXIDATION; BLACK; IMPEDANCE; XPS

categoria

Chemistry; Engineering

autores

Salgado, JRC; Duarte, RG; Ilharco, LM; do Rego, AMB; Ferraria, AM; Ferreira, MGS

nossos autores

agradecimentos

The authors acknowledge Dr. Andrei Salak (Universidade de Aveiro) for performing the XRD measurements and Dr. A.P.S. Dias (ICEMS/IST) for the useful discussions. J.R.C. Salgado acknowledges the financial support of Portuguese Science and Technology Foundation (FCT, Ciencia 2008).

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