process of functionalization of carbon sources by the formation on their surface of oxygenated functional groups for application as support of electrocatalysts in cells.

摘要

CARBON SOURCE FUNCTIONALIZATION PROCESS FOR TRAINING THE SURFACE OF OXYGENIZED FUNCTIONAL GROUPS FOR APPLICATION AS SUPPORT FOR ELECTROCATALIZERS IN FUEL TYPE MEMBRANE TYPE CELLS. Belonging to the solid polymer electrolyte fuel cell electrocatalyst sector, it concerns a form of functionalization of the micro nanoscopic surface of the carbon source through chemical reactions, performing the growth of carboxylic groups - COOH and / or alcohol groups - OH on the surface of the carbon source, followed by filtration, washing of the material to remove excess oxidizing agent or reacted with impurities, and finally drying. Next, the Pt and PtRu type metals and alloys nanoparticles are anchored using any state of the art method for preparing the dispersed catalysts. The invention eliminates impurities from the surface of the carbon source and, consequently, improves the electrical conductivity of the material and also contributes to a more homogeneous distribution of the metal nanoparticles in the support due to the formation of carboxyl, hydroxyl, ketone and ether type groups on the surface of the material. carbon source which, by allosteric effect, make the nanoparticles deposit more homogeneously on their surface, improve the catalytic activity of the material, and also decreases the probability of nanoparticle sintering, that is, decreasing the catalyst aging.