Producción Científica Profesorado

Mixed-reactant ethanol fuel cell using an electrochemically deposited Ag@Pt tolerant cathode.



Mendoza Huizar, Luis Humberto

2016

Mixed-reactant ethanol fuel cell using an electrochemically deposited Ag@Pt tolerant cathode. J.C. Abrego-Martínez, Youling Wang, L.H. Mendoza-Huizar, J. Ledesma-Garcia, F.M. Cuevas-Muniz, M. Mohamedi, L.G. Arriaga. International Journal of Hydrogen Energy, vol 41, 23417-23424 (2016). ISSN: 0360-3199.


Abstract


n the present work, we report an ethanol tolerant cathode catalyst developed through a two-stages electrodeposition of Pt and Ag nanoparticles on a glassy carbon electrode using chronoamperometric and voltammetric techniques. The resulting nanoparticles were characterized by Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), X-Ray Photoelectron Spectroscopy (XPS) and electrochemical techniques. According to the SEM study, the synthetized particles have semi-spherical shape and their average diameter is 200 nm. The catalyst showed a layer onto layer or a core?shell-like architecture, where the silver layer that was built onto the platinum surface covers the nanoparticles. This Ag@Pt catalyst was successfully evaluated for the oxygen reduction reaction, involving a four-electron transfer mechanism. Additionally, it exhibited high tolerance to ethanol oxidation reaction. The onset potential of the ORR was 0.81 V in presence of 5 M EtOH. The catalyst was further tested as cathode in an alkaline mixed-reactant fuel cell using 1 M EtOH + O2, yielding more than 400 mV and 20 ?W cm?2.



Producto de Investigación




Artículos relacionados

Nucleation and Growth Kinetics of Electrodeposited Sulfate-Doped Polypyrrole: Determination of the D...

Cobalt electrodeposition onto highly oriented pyrolytic graphite (HOPG) electrode from ammonium sulf...

Predicting the Phase Diagram of a Liquid Crystal Using the Convex Peg Model and the Semiempirical PM...

Bioacumulación y daños genotóxicos en Pez Cebra (Danio rerio) por arsénico en aguas de Zimapán, Hida...

Nucleation and Growth Kinetics of Electrodeposited Sulfate-Doped Polypyrrole: Determination of the D...

Chemical Reactivity of Atrazine Employing the Fukui Function

The role of temperature in copper electrocrystallization in ammoniachloride solutions

Synthesis of Zn compounds derived from 1H-benzimidazol-2-ylmethanamine

Characterization of Main Anthocyanins Extracted from Pericarp Blue Corn by MALDI-ToF MS

Kinetic study of the cobalt electrodeposition onto glassy carbon electrode from ammonium sulfate sol...