Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 135, Issue 1, Pages 188-192Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2012.04.051
Keywords
Ethanol oxidation; Electrocatalyst; Platinum; Aluminum phosphate
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Funding
- National Research Foundation of Korea, through the World Class University (WCU) [R31-2008-000-10075-0]
- Ministry of Education, Science and Technology (MEST) [2010-0024382]
- Korean Government (MEST: NRF) [2010-0029065]
- National Research Foundation of Korea [2010-0024382, 2010-0029066, R31-2012-000-10075-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The enhanced catalytic properties toward ethanol electrooxidation on Pt/AlPO4 nanocomposite thin-film electrodes were investigated. The Pt/AlPO4 nanocomposites with various Al/Pt ratios (0.27, 0.57, and 0.96) were fabricated by a co-sputtering method. All of the Pt/AlPO4 nanocomposites showed a negative shift in the onset potential and a higher current density than those of pure Pt electrode for the electrooxidation of ethanol. Among the various Pt/AlPO4 nanocomposite thin-film electrodes, the electrode with an atomic ratio of Al to Pt of 0.57 showed the highest electrocatalytic activity for ethanol electrooxidation. The activation enthalpy for the optimum Pt/AlPO4 nanocomposite was approximately 0.05 eV lower than that of pure Pt. It is believed that the enhancement in catalytic activity is due to the electron-rich Pt resulting from the Fermi-energy difference between Pt and AlPO4. (C) 2012 Elsevier B.V. All rights reserved.
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