Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 10, Issue 5, Pages 740-744Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.02.022
Keywords
fuel cells; electrocatalyst; palladium-based nanoalloys; oxygen reduction reaction
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The factors controlling the electrocatalytic activity for the oxygen reduction reaction (ORR) in fuel cells have been tuned and investigated systematically with the low cost carbon-supported Pd70Co30 nanoalloy. The catalytic activity decreases with increasing annealing temperature due to an increasing degree of alloying (Co content in the Pd lattice) and crystallite size. With a controlled crystallite size of similar to 8 nm, the activity is found to decrease with increasing degree of alloying from 18 to 30 at.% Co. However, the catalyst durability increases considerably with annealing temperature due to the alloying of Pd with Co and an increase in crystallite size. (C) 2008 Elsevier B.V. All rights reserved.
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