TY - JOUR
T1 - Characterization and electrocatalytic properties of sonochemical synthesized PdAg nanoparticles
AU - Godínez-García, Andrés
AU - Pérez-Robles, Juan Francisco
AU - Martínez-Tejada, Hader Vladimir
AU - Solorza-Feria, Omar
N1 - Funding Information:
This work was partially supported by a Grant of National Science and Technology Council of Mexico, CONACYT (Ref. 83247). One of the authors (A.G.G.) would like to thank CONACYT for providing him the Ph.D. fellowship and Luzma Avilés-Arellano for her technical support.
PY - 2012/6/15
Y1 - 2012/6/15
N2 - High intensity ultrasound was used in the synthesis of PdAg nanoparticles. PdAg nanoparticles were characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS), scanning transmission electron microscopy (STEM) and high-resolution transmission electron microscopy (HRTEM). Catalytic properties for oxygen reduction reaction (ORR) were determined by electrochemical techniques of cyclic voltammetry (CV) and thin-film rotating disk electrode (TF-RDE). Finally the electrocatalyst was tested as a cathode in a single polymer electrolyte membrane fuel cell (PEMFC). Sonochemical synthesis (SS) decreased the overpotential required for the ORR and increased the double-layer capacitance (DLC) respect to the sodium borohydride reduction method due to a better distribution on vulcan carbon support. The electrocatalytic activity of the nanometric bimetallic electrocatalyst for the ORR in acid media showed a favorable multielectron charge transfer process (n = 4e -) to water formation. The performance of the membrane electrode assembly (MEA) prepared with dispersed PdAg/C as a cathode catalyst in a single PEMFC is lower in comparison to platinum.
AB - High intensity ultrasound was used in the synthesis of PdAg nanoparticles. PdAg nanoparticles were characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS), scanning transmission electron microscopy (STEM) and high-resolution transmission electron microscopy (HRTEM). Catalytic properties for oxygen reduction reaction (ORR) were determined by electrochemical techniques of cyclic voltammetry (CV) and thin-film rotating disk electrode (TF-RDE). Finally the electrocatalyst was tested as a cathode in a single polymer electrolyte membrane fuel cell (PEMFC). Sonochemical synthesis (SS) decreased the overpotential required for the ORR and increased the double-layer capacitance (DLC) respect to the sodium borohydride reduction method due to a better distribution on vulcan carbon support. The electrocatalytic activity of the nanometric bimetallic electrocatalyst for the ORR in acid media showed a favorable multielectron charge transfer process (n = 4e -) to water formation. The performance of the membrane electrode assembly (MEA) prepared with dispersed PdAg/C as a cathode catalyst in a single PEMFC is lower in comparison to platinum.
KW - Alloys
KW - Chemical synthesis
KW - Electrochemical properties
KW - Electrochemical techniques
UR - http://www.scopus.com/inward/record.url?scp=84861529053&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2012.03.105
DO - 10.1016/j.matchemphys.2012.03.105
M3 - Artículo en revista científica indexada
AN - SCOPUS:84861529053
SN - 0254-0584
VL - 134
SP - 1013
EP - 1019
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
IS - 2-3
ER -