Electrosynthesis of RhPd Nanoparticles and Electrocatalytic Activity in the Oxidation of Methanol
The results obtained in the electrosynthesis at a constant potential of RhPd bimetallic nanoparticles are presented in this work. Additionally, the electrocatalytic activity was tested in the oxidation of methanol on these nanometric systems, using cyclic voltammetry (CV). The materials obtained were characterized by conventional transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and cyclic voltammetry (CV) in order to determine their morphology, size and electrochemical behavior. The results confirmed that the electrochemical technique is an alternative for obtaining RhPd nanoparticles, starting from salts of the metals of interest in presence of tetraalkylammonium bromide salts as a stabilizing agent. It was also found that the size distribution of the nanoparticles obtained depends on the potential applied during the synthesis, which is in agreement with that reported in the literature, ie potential increases, decreases the size of the particles. In general, the shape of the nanostructures synthesized in this work corresponds to dispersed and agglomerated particles. Rd and Pd particles obtained have a size between 1 and 5 nm, also finding bimetallic phases. RhPd nanoparticles showed low electrocatalytic activity towards methanol oxidation.