Journal
CATALYSIS COMMUNICATIONS
Volume 33, Issue -, Pages 34-37Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2012.12.026
Keywords
Fuel cells; Methanol oxidation; Electrocatalysis; Anode catalyst; CO tolerance
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Funding
- National Natural Science Foundation of China [21106049]
- Fundamental Research Funds for the Central Universities [2012ZM0033]
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Carbon nanotube immobilized IrO2 (IrO2/CNT) was prepared by a simple oxidation method with hydrogen peroxide as an oxidant and used as an improved catalyst support to load active Pt to prepare Pt/IrO2/CNT anode catalyst for direct methanol fuel cell. Electrochemical measurement revealed that Pt/IrO2/CNT exhibits much higher activity for methanol oxidation and better CO tolerance than Pt/CNT. The anodic peak current of methanol oxidation on Pt/IrO2/CNT (873.1A g(Pt)(-1)) is 2.6 times that of Pt/CNT catalyst (335.7A g(Pt)(-1)). The enhanced performance of Pt/IrO2/CNT is attributed to the fact that IrO2 improves the dispersion of Pt nanoparticles, and lowers the charge transfer resistance in methanol electrooxidation. (C) 2012 Elsevier B.V. All rights reserved.
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