Nano Express

Nanoscale Research Letters

, Volume 5, Issue 6, pp 1002-1009

Open Access This content is freely available online to anyone, anywhere at any time.

Platinum–Vanadium Oxide Nanotube Hybrids

  • Filipe L. S. MelloAffiliated withLaboratório de Catálise, Instituto Nacional de Tecnologia/MCT
  • , Lídia O. O. CostaAffiliated withLaboratório de Catálise, Instituto Nacional de Tecnologia/MCT
  • , Eduardo Padrón HernándezAffiliated withCentro de Tecnologias Estratégicas do Nordeste/CETENE, Av. Prof. Luiz Freire, 01, Cidade UniversitáriaDepartamento de Física, Universidade Federal de Pernambuco, Av. Professor Luiz Freire, s/n, Cidade Universitária
  • , Andréa M. Duarte de FariasAffiliated withLaboratório de Catálise, Instituto Nacional de Tecnologia/MCT
  • , Marco A. FragaAffiliated withLaboratório de Catálise, Instituto Nacional de Tecnologia/MCT Email author 

Abstract

The present contribution reports on the features of platinum-based systems supported on vanadium oxide nanotubes. The synthesis of nanotubes was carried out using a commercial vanadium pentoxide via hydrothermal route. The nanostructured hybrid materials were prepared by wet impregnation using two different platinum precursors. The formation of platinum nanoparticles was evaluated by applying distinct reduction procedures. All nanostructured samples were essentially analysed by X-ray diffraction and transmission electron microscopy. After reduction, transmission electron microscopy also made it possible to estimate particle size distribution and mean diameter calculations. It could be seen that all reduction procedures did not affect the nanostructure of the supports and that the formation of metallic nanoparticles is quite efficient with an indistinct distribution along the nanotubes. Nevertheless, the reduction procedure determined the diameter, dispersion and shape of the metallic particles. It could be concluded that the use of H2PtCl6 is more suitable and that the use of hydrogen as reducing agent leads to a nanomaterial with unagglomerated round-shaped metallic particles with mean size of 6–7 nm.

Keywords

Nanotubes Pt nanoparticles Hybrid materials Nanostructured materials