TY - JOUR
T1 - Pd5Cu4Pt oxygen reduction nanocatalyst for PEM fuel cells
AU - Martínez-Casillas, D. C.
AU - Calderon, H. A.
AU - Collins-Martínez, V.
AU - Solorza-Feria, O.
N1 - Funding Information:
We gratefully acknowledge the financial support of the National Council of Science and Technology, CONACYT (grants 101537 and FOINS 2250-6 ) and Science and Technology Institute, ICYTDF (grants PICCO 10-3 and PICSO 11-24 ). DCMC thanks CONACYT for the doctoral fellowship.
PY - 2013
Y1 - 2013
N2 - Carbon dispersed Pd5Cu4Pt nanocatalyst synthesized by chemical reduction with NaBH4 for the oxygen reduction reaction (ORR) in acid media is investigated. Nanocatalyst is physically characterized by transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (DRX). Results demonstrate the formation of conglomerate nanometric particles ranging from 2 to 10 nm in size. Electrochemical activity is demonstrated by cyclic voltammetry (CV) and rotating disk electrode (RDE) techniques. The results show that the onset potential for the ORR on Pd5Cu 4Pt is shifted by ca. 50 mV to more positive values and enhanced catalytic current densities are observed in comparison to carbon dispersed PdCu and Pd catalysts. The Pd5Cu4Pt tested as cathode electrode in a membrane-electrode assembly (MEA) shows a power density of 330 mW cm -2 at 0.5 V and 80 C, resulting an attractive low Pt content cathode nanocatalyst for PEM fuel cells.
AB - Carbon dispersed Pd5Cu4Pt nanocatalyst synthesized by chemical reduction with NaBH4 for the oxygen reduction reaction (ORR) in acid media is investigated. Nanocatalyst is physically characterized by transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (DRX). Results demonstrate the formation of conglomerate nanometric particles ranging from 2 to 10 nm in size. Electrochemical activity is demonstrated by cyclic voltammetry (CV) and rotating disk electrode (RDE) techniques. The results show that the onset potential for the ORR on Pd5Cu 4Pt is shifted by ca. 50 mV to more positive values and enhanced catalytic current densities are observed in comparison to carbon dispersed PdCu and Pd catalysts. The Pd5Cu4Pt tested as cathode electrode in a membrane-electrode assembly (MEA) shows a power density of 330 mW cm -2 at 0.5 V and 80 C, resulting an attractive low Pt content cathode nanocatalyst for PEM fuel cells.
KW - Electrocatalyst synthesis
KW - Nanocatalyst
KW - Oxygen reduction reaction
KW - PEMFC cathode
KW - PdCuPt
UR - http://www.scopus.com/inward/record.url?scp=84883808515&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2012.11.066
DO - 10.1016/j.ijhydene.2012.11.066
M3 - Artículo
AN - SCOPUS:84883808515
SN - 0360-3199
VL - 38
SP - 12674
EP - 12680
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 28
ER -
