Centro de Investigación y Desarrollo Tecnológico en Electroquímica

About: Centro de Investigación y Desarrollo Tecnológico en Electroquímica is a based out in . It is known for research contribution in the topics: Cyclic voltammetry & Catalysis. The organization has 537 authors who have published 682 publications receiving 10382 citations. The organization is also known as: Centro de Investigacion y Desarrollo Tecnologico en Electroquimica & Center of Research and Technologic Development in Electrochemistry.

TiO2 Nanotubes Transformation Into 4nm Anatase Nanoparticles: Anodizing Industrial Recycled Titanium for Photocatalytic Water Remediation

Abstract: The scope of this work shows novel experimental findings on preparing anatase TiO2 nanoparticles, first anodizing titanium into an organic media for obtaining TiO2 nanotubes, and using these as a photocatalytic active electrode in treating water polluted with organic contaminants. The substrates were grit blasted to obtain mechanical fixation of the generated nanotubular TiO2 structure. This was successfully achieved without diminishment of the nanotubes order and with a self-leveling of the outer surface. A new phenomenon has been investigated consisting of the process of oxidation of the nanotubes in water after anodizing. Along this process, methyl orange added to the aqueous solution was discolored as part of the redox reaction involved. The final state of the modified layer was composed of conglomerates of almost completely crystalline TiO2 nanoparticles, around 4 nm in size, consisting of anatase. SEM and TEM images show the transition of the amorphous nanotubes (atomic disorder/nanometric order) to crystalline disordered particles (atomic order/nanometric disorder).

Electrochemical Synthesis of Pt Nanoparticles Inside of PAMAM Dendrimers for Oxygen Reduction

Abstract: Platinum nanoparticles inside of hydroxyl-terminated poly(amidoamine) (PAMAM) dendrimer molecules were prepared by electrochemical reduction in the dendrimer-Pt(II) complexes (G4OHPt EC ) previously anchored on glassy-carbon electrodes and characterized by transmission electron microscopy and electrochemical techniques. The synthetic route resulted in the formation of a robust electrochemically active film, which additionally avoided the presence of residual salts that could diminish the electrocatalyst performance. Electrocatalytic activity for oxygen reduction in G4OHPt EC with average diameters of ca. 3-4 nm was evaluated using a rotating disk electrode configuration in acidic media in the absence and the presence of methanol. The results were compared with the performance of dendrimer-encapsulated Pt particles prepared by the conventional method that involved a chemical reduction in metallic ions (G4OHPt C ).