| “三明治式”多层Au/Pt复合薄膜的制备及其对甲醇的电氧化 |
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| 引用本文： | 赵静,孙越,李永军,梁韧.“三明治式”多层Au/Pt复合薄膜的制备及其对甲醇的电氧化[J].物理化学学报,2011,27(8):1868-1874. |
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| 作者姓名： | 赵静 孙越 李永军 梁韧 |
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| 作者单位： | Department of Chemisty, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China |
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| 基金项目： | supported by the National Natural Science Foundation of China(20703016); Scientific and Technological Projects of Hunan Province,China(2010FJ6030); State Key Laboratory for Physical Chemistry of Solid Surface(Xiamen University),China~~ |
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| 摘 要： | 采用界面组装、欠电位沉积和氧化还原置换反应组合方法制备了单层Pt/Au复合薄膜, 并且不需要任何有机偶联剂; 组装单层Pt/Au复合薄膜为三类多层Pt/Au复合薄膜: (Pt/Au)n、Ptm/Au和(Pt3/Au)k (n、m和k分别为Pt/Au、Pt和Pt3/Au的层数). 采用电子显微镜研究了Au纳米粒子单层膜和Pt/Au复合多层膜的形貌. 对于所有的多层膜电极而言, 其电化学活性面积随着层数的增加而增加. 通过研究甲醇在每一类Pt/Au复合薄膜上的氧化电流密度, 考察了其对甲醇的电催化和抗毒化性能. 对于同一类复合薄膜而言, 甲醇分别在(Pt/Au)3、Pt3/Au和(Pt3/Au)2电极上均具有最大的氧化电流密度, 且优于本体Pt电极. 在这三种电极中, (Pt/Au)3电极无论从电流密度上还是从抗毒化能力上讲, 其性能是最好的, 而且其抗毒化能力也优于商业Pt/C催化剂. 这种良好的催化性能源于Au和Pt之间最大化的协同效应, 这取决于Pt和Au原子比率以及Pt纳米层和Au纳米层之间的排布方式.
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| 关 键 词： | 界面组装 欠电位沉积 Au/Pt复合多层膜 电氧化 甲醇 |
| 收稿时间： | 2011-04-11 |
| 修稿时间： | 2011-06-08 |
Preparation of 'Sandwich-Like' Au/Pt Composite Multilayer Films for Methanol Electrooxidation |
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| ZHAO Jing,SUN Yue,LI Yong-Jun,LIANG Ren.Preparation of 'Sandwich-Like' Au/Pt Composite Multilayer Films for Methanol Electrooxidation[J].Acta Physico-Chimica Sinica,2011,27(8):1868-1874. |
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| Authors: | ZHAO Jing SUN Yue LI Yong-Jun LIANG Ren |
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| Affiliation: | Department of Chemisty, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China |
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| Abstract: | Pt/Au composite monolayer films were fabricated by combining interfacial assembly and under-potential deposition(UPD) with redox replacement.Based on the Pt/Au composite monolayers,an organic linker-free method was proposed for the fabrication of sandwich-like Pt/Au composite multilayer films:(Pt/Au)n,Ptm/Au,and(Pt3/Au)k(n,m,or k represents the layer number).Electron microscopy was used to characterize the morphologies of the Au monolayer films and the Pt/Au composite multilayer films.For each type of compo... |
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| Keywords: | Interfacial self-assembly Under-potential deposition Au/Pt composite multilayer film Electrooxidation Methanol |
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