Novel Nanoscale Ceria–Platinum Composite Electrodes for Direct Alcohol Electro-Oxidation
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A nanocrystalline Pt/CeO2 composite electrode is fabricated to study the electrochemical oxidation of methanol and ethanol. Three different methods have been developed for the preparation of the composite electrode and are compared in terms of their oxidation efficiencies. In general, all the electrode preparation methodologies show a great enhancement of the oxidation current for the alcohol. However, methods based on the electrodeposition of a ceria rich Pt matrix show the greatest effectiveness of alcohol oxidation. The enhancement of the anodic current is dependent on the particle loading and size distribution in the composite matrix. In general, ceria appears to be an effective alternative to ruthenium in direct alcohol fuel cells.
KeywordsDirect alcohol fuel cells Ceria Oxidation Catalysis Electrochemistry Methanol
The authors thank the Office of Research and Commercialization, The Nanoscience Technology Center, The College of Sciences and the Department of Chemistry at the University of Central Florida for their support. Díaz, Seal, Karakoti and Greenletch also wish to thank the Florida Space Grant Consortium for their support throughout a Florida Space Research and Education Grant Program. Seal acknowledges NSF CMII’s support throughout grant 0548815. Díaz also acknowledges UCF’s Materials Characterization Facility (AMPAC) at the University of Central Florida for their facilities.
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