Development of nanophase CeO2-Pt/C cathode catalyst for direct methanol fuel cell |
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| Affiliation: | 1. School of Chemical Engineering and Research Center for Energy Conversion and Storage, Seoul National University, Seoul 151-744, South Korea;2. Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, South Korea;1. Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China;2. School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China;1. School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;2. IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1040-001 Lisboa, Portugal;1. Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;2. Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;3. Department of Chemical Engineering, LKC Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Sungai Long Campus, Cheras, 43000 Kajang, Selangor, Malaysia;1. School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China;2. Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, Xiangtan 411201, Hunan, China;1. Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany;2. Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, 18000 Prague, Czech Republic;3. Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany |
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| Abstract: | Incorporation of nanophase ceria (CeO2) into the cathode catalyst Pt/C increased the local oxygen concentration in an air atmosphere, leading to enhanced single-cell performance of direct methanol fuel cell (DMFC). Ceria doped catalysts were effective at low oxygen partial pressure (≤0.6 atm) conditions and 1 wt.% CeO2 doped Pt/C exhibited the highest performance. The effect of ceria was more prominent with air as the cathode reactant and the ceria acted as a mere impurity in a pure oxygen atmosphere, decreasing the DMFC performance. Impedance spectra showed a decrease in polarization resistance with the ceria addition to the cathode catalyst in low-potential regions confirming the facile mass transfer of the reactant oxygen molecules to catalytic sites. Transmission electron microscopy (TEM) pictures showed a uniform distribution of CeO2 around platinum sites. |
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