Journal
ELECTROCHIMICA ACTA
Volume 108, Issue -, Pages 480-485Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.06.126
Keywords
Proton exchange membrane (PEM) fuel cell; Oxygen reduction reaction; Non-noble metal electrocatalyst; Mesoporous carbon; Ultrasonic spray pyrolysis; Heat and acid treatments
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Mesoporous carbon spheres (MPCs) are synthesized using a template assisted ultrasonic spray pyrolysis technique and explored as the support materials for non-noble metal electrocatalysts intended to be used for PEM fuel cell oxygen reduction reaction (ORR). TEM images show that MPCs synthesized are the honeycomb-like carbon spheres with uniform nanosized pores. MPC's surface area, thermal stability and affinity to catalyst are improved by a second heat treatment and an acidic treatment, confirmed by BET, TGA, and electrochemical measurements, respectively. The synthesized Fe-N-x catalyst with MPC support shows an improved ORR activity when compared to the catalyst supported by commercially available Black Pearl 2000. (C) 2013 Published by Elsevier Ltd.
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