Pt/AlPO₄ nanocomposite thin-film electrodes for ethanol electrooxidation

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• 作者：Yuhong Oh ; Joonhyeon Kang ; Seunghoon Nam ; Sujin Byun ; Byungwoo Park ; ^{byungwoo@snu.ac.kr}
• 关键词：Ethanol oxidation ; Electrocatalyst ; Platinum ; Aluminum phosphate
• 刊名：Materials Chemistry and Physics
• 出版年：2012
• 出版时间：16 July, 2012
• 年：2012
• 卷：135
• 期：1
• 页码：188-192
• 全文大小：1022 K

文摘

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.