期刊
JOURNAL OF POWER SOURCES
卷 193, 期 2, 页码 470-476出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2009.04.007
关键词
FeTPP; TiO2; Support; Catalyst; Oxygen reduction; Stability
Carbon black and titanium dioxide supported iron tetraphenylporphyrin (FeTPP/TiO2/C) catalysts for oxygen reduction reaction (ORR) were prepared by sol-gel and precipitation methods followed by a heat-treatment at temperatures of 400-1000 degrees C. The FeTPP/C and TiO2/C were also studied for comparison. The FeTPP/TiO2/C pyrolyzed at 700 degrees C exhibits significantly improved stability while maintaining high activity towards ORR in comparison with the FeTPP/C counterpart. The electrochemical study combined with XRD, XPS, and SEM/EDX analyses revealed that the appropriate dispersion of TiO2 on the surface of FeTPP/TiO2/C catalysts, which depending on heat-treatment temperature, plays a crucial role in determining the activity and stability of catalysts. (c) 2009 Elsevier B.V. All rights reserved.
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