NSTI Nanotech 2009

Dispersed stabilized Pt nanoparticles synthesized from an organometallic precursor

E. Ramírez-Meneses, A. Torres-Huerta, M.A. Domínguez-Crespo, V. Montiel Palma, G. Hernández-Tapia
CICATA - IPN UNIDAD ALTAMIRA, MX

Keywords: carbon nanotubes, platinum, nanoparticles, organometallic

Abstract:

In electrocatalysis, carbon materials have been generally employed to support metallic nanoparticles for electrochemical applications. Many methods to prepare CNTs supported metal nanoparticles including electrochemical, microwave irradiation and wet chemical methods have been reported in the literature. In this context, the use of an organometallic precursor, able to decompose in mild conditions in the presence of a reducing gas has appeared as a valuable method of synthesis of these species. In this work, we investigated the synthesis of platinum nanoparticles starting from the tris(dibenzylideneacetone) diplatinum complex Pt2(dba)3 synthetized in the laboratory and decomposed under H2 atmosphere in THF in presence of hexadecylamine and functionalized Carbon Nanotubes (CNT). This method is a good alternative to disperse metallic nanoparticles on CNT with application in electrocatalysis. High Resolution Transmission Electron Microscopy (HRTEM) studies revealed well dispersed and isolated platinum nanoparticles (2-3 nm). Additionally, Infrared Fourier Transform Spectroscopy analyses were used to study the presence of the stabilizers on the surface of the Pt nanoparticles.
 
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