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Performance Comparison of Pt 1– x Pd x /Carbon Nanotubes Catalysts in Both Electrodes of Polymer Electrolyte Membrane Fuel Cells
Author(s) -
Jung D.W.,
Park S.,
Ahn C.Y.,
Kim J.B.,
Oh E.S.
Publication year - 2012
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201100039
Subject(s) - catalysis , materials science , carbon nanotube , electrolyte , electrochemistry , proton exchange membrane fuel cell , dielectric spectroscopy , cyclic voltammetry , chemical engineering , hydrogen , nanoparticle , anode , inorganic chemistry , electrode , nanotechnology , chemistry , organic chemistry , engineering
The catalytic activity of Pt 1– x Pd x nanoparticles supported on carbon nanotubes (CNTs) was evaluated for both the hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs). Using a colloidal method, Pt 1– x Pd x /CNTs catalysts ( x = 0, 0.46, 0.76, and 0.9) were prepared, and their physical and electrochemical characteristics were analyzed using a variety of characterization techniques, including XRD, TEM, energy dispersive spectrometer, cyclic voltammetry, and electrochemical impedance spectroscopy. Both Pt and Pd atoms formed a continuous solid solution and thus were randomly mixed in Pt 1– x Pd x nanoparticles. Due to the high hydrogen absorption of Pd, the use of Pd in the catalyst provided an advantage for HOR but a disadvantage for ORR. The Pt 0.53 Pd 0.47 /CNTs catalyst in the anode and cathode showed the best cell performance of PEMFCs.