| 四氢呋喃-水-乙醇三元溶液体系制备高合金化Pt-Ru/CMK-3催化剂 |
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| 引用本文： | 吴伟,曹洁明,陈煜,陆天虹.四氢呋喃-水-乙醇三元溶液体系制备高合金化Pt-Ru/CMK-3催化剂[J].物理化学学报,2007,23(4):559-564. |
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| 作者姓名： | 吴伟 曹洁明 陈煜 陆天虹 |
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| 作者单位： | Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China; Department of Chemistry, Nanjing Normal University, Nanjing 210097, P. R. China |
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| 基金项目： | 国家自然科学基金(50502020)，江苏省高技术项目(BG2005009)，南京航空航天大学科研创新基金资助 |
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| 摘 要： | 提出了在四氢呋喃(THF)、H2O和乙醇三元体系中用一般的化学还原法在室温下制备高合金化Pt-Ru/CMK-3催化剂的新方法. 与在纯水中制得的商品化ETEK催化剂相比, 其Pt-Ru粒子的合金化程度高、平均粒径较小且相对结晶度低, 因此, 该催化剂对甲醇氧化的电催化活性远高于在纯水中制得的Pt-Ru催化剂. 高合金化程度的原因是H2PtCl6和RuCl3在THF、H2O和乙醇三元溶液体系中的起始还原电位相近. 此外, CMK-3以其规整的二维有序孔道结构, 为直接甲醇燃烧电池(DMFC)中电子和物质的传输提供了方便的路径, 其巨大的比表面积也为Pt-Ru 纳米粒子的均匀分散提供了良好的载体.
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| 关 键 词： | 直接甲醇燃料电池 Pt-Ru/C 催化剂 四氢呋喃 合金化程度 |
| 收稿时间： | 2006-09-18 |
| 修稿时间： | 2006-09-18 |
Preparation of High-alloying Pt-Ru/CMK-3 Catalysts in THF-H2O-EtOH Ternary Solution System |
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| WU Wei, CAO Jie-Ming, CHEN Yu , LU Tian-Hong.Preparation of High-alloying Pt-Ru/CMK-3 Catalysts in THF-H2O-EtOH Ternary Solution System[J].Acta Physico-Chimica Sinica,2007,23(4):559-564. |
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| Authors: | WU Wei CAO Jie-Ming CHEN Yu LU Tian-Hong |
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| Institution: | Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China; Department of Chemistry, Nanjing Normal University, Nanjing 210097, P. R. China |
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| Abstract: | The Pt-Ru particles of Pt-Ru/CMK-3 catalyst were found to possess high degree of alloying, small average size, and low relative crystallinity when the Pt-Ru/CMK-3 catalyst was prepared using the general chemical reduction method in the ternary solution system containing tetrahydrofuran (THF), H_2O, and ethanol. The Pt-Ru/CMK-3 catalyst showed high electrocatalytic activity for methanol oxidation. It indicated that the alloying degree of Pt-Ru could significantly affect the electrocatalytic activity for methanol oxidation. The Pt-Ru/CMK-3 catalyst with high alloying degree can be obtained because THF and H_2PtCl_6 can form a complex leading to the reduction potentials of H_2PtCl_6 and RuCl_3, which are close to each other in the aqueous solution with THF. |
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| Keywords: | Direct methanol fuel cell Pt-Ru/C catalyst Tetrahydrofuran Alloying degree |
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