Resumo

JORGE, G. A. et al. Electrochemical Synthesis of Rhodium Nanoparticles and their Characterization by Transmission Electron Microscopy(TEM). Port. Electrochim. Acta [online]. 2009, vol.27, n.3, pp.279-287. ISSN 0872-1904.

In this work, the electrochemical synthesis and characterization of rhodium nanoparticles are reported. The Rh nanoparticles were electrochemically synthesized at room temperature by direct electroreduction of rhodium (III) chloride (RhCl₃) salt. We have applied different values of current intensity and potential in order to control the formed size of Rh nanoparticles. We have used tetrapropyl ammonium bromide (TPAB), as the support electrolyte and at the same time, effectively stabilizing the nanoparticles formed in aqueous medium. Size and morphology of nanoparticles formed, are subsequently studied by Transmission Electronic Microscopy (TEM). Electrocatalytic activity and stability for the oxidation of methanol, were studied using cyclic voltammetry. Nanoparticles of Rh synthesized present an electrocatalytical activity toward the electrooxidation of methanol.

Palavras-chave : rhodium nanoparticles; methanol oxidation; cyclic voltammetry.

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