Effect of TiOsub(2) content on ethanol electrooxidation in alkaline media using Pt nanoparticles supported on physical mixtures of carbon and TiOsub(2) as electrocatalysts
Carregando...
Data
Data de publicação
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Electrocatalysis
ODS
Exportar
Resumo
Pt nanoparticles supported on physical mixtures of
carbon and TiO2 (Pt/(C+TiO2) electrocatalyst) were tested for
ethanol electrooxidation in alkaline media. The electrocatalysts
were prepared with different C/TiO2 mass ratios using borohydride as reducing agent. X-ray diffraction patterns of the
obtained materials showed the peak characteristic of Pt facecentered cubic (fcc) structure, carbon, and TiO2 phases.
Transmission electron micrographs showed metal nanoparticles distributed preferentially over TiO2 support with average
particle size between 5 and 7 nm for all electrocatalysts. The
cyclic voltammograms of Pt/(C+TiO2) electrocatalysts in alkaline media showed a decrease of Pt surface area with the
increase of TiO2 content. The electrooxidation of ethanol suggests the Pt/(C + TiO2) (40:60) as the most promising
electrocatalyst for use in fuel cells since it presents almost the
same current density value as that of the others and also slower
current density decay in chronoamperometry. Moreover, TiO2
provides oxygen species to promote the CO oxidation,
resulting in more activity.
Como referenciar
SOUZA, R.F.B. de; BUZZO, G.S.; SILVA, J.C.M.; SPINACE, E.V.; NETO, A.O.; ASSUMPCAO, M.H.M.T. Effect of TiOsub(2) content on ethanol electrooxidation in alkaline media using Pt nanoparticles supported on physical mixtures of carbon and TiOsub(2) as electrocatalysts. Electrocatalysis, v. 5, p. 213-219, 2014. DOI: 10.1007/s12678-014-0183-4. Disponível em: http://repositorio.ipen.br/handle/123456789/8540. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.