| Ru膜上Pt层的自发沉积及其在电化学表面增强红外光谱中的应用 |
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| 引用本文： | 李巧霞a,王金意a,徐群杰b,蔡文斌,a.Ru膜上Pt层的自发沉积及其在电化学表面增强红外光谱中的应用[J].化学学报,2008,66(20):2302-2304. |
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| 作者姓名： | 李巧霞a 王金意a 徐群杰b 蔡文斌 a |
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| 作者单位： | 复旦大学化学系，上海电力学院环境工程系 |
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| 基金项目： | 国家自然科学基金，上海市纳米科技专项基金 |
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| 摘 要： | 采用自发沉积法在Ru膜上生成超薄Pt层(简称Ru/Pt膜), 即在开路状态下将电化学还原后的Ru膜浸于除去氧的H2PtCl6溶液中进行自发沉积. 电化学伏安法测量表明, 随着电还原-自发沉积循环次数的增加, 该Ru/Pt膜电极所含Pt组分增加, 且CO吸附层的电氧化峰电位较Pt膜电极上的明显负移. 应用现场衰减全反射表面增强红外光谱法(ATR-SEIRAS)可轻易检测到在该膜电极Pt和Ru位上吸附CO的振动谱峰. 所制Ru/Pt膜电极不仅对CO的电催化氧化具有协同效应, 还可应用于现场ATR-SEIRAS的研究中.
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| 关 键 词： | Ru基Pt层电极 自发沉积法 电催化 CO 衰减全反射表面增强红外光谱 |
| 收稿时间： | 2008-5-5 |
| 修稿时间： | 2008-5-30 |
Spontaneous Deposition of Pt Overlayer on Ru Film and iIts Application in Electrochemical Surface-enhanced IR Absorption Spectroscopy |
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| LI, Qiao-Xia,WANG, Jin-Yi,XU, Qun-Jie,CAI, Wen-Bin.Spontaneous Deposition of Pt Overlayer on Ru Film and iIts Application in Electrochemical Surface-enhanced IR Absorption Spectroscopy[J].Acta Chimica Sinica,2008,66(20):2302-2304. |
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| Authors: | LI Qiao-Xia WANG Jin-Yi XU Qun-Jie CAI Wen-Bin |
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| Affiliation: | (Department of Chemistry, Fudan University, Shanghai 200433;)
( Department of Environmental Engineering, Shanghai University of Electric Power, Shanghai, 200090)
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| Abstract: | A spontaneous deposition approach was developed to form a Pt ultrathin overlayer onto a Ru nanoparticle film (simplified hereafter as Ru/Pt film) in which the freshly electroreduced Ru film was sub-sequently immersed in a deaerated H2PtCl6 solution without potential control. Voltammetric measurements indicated that Pt content increased with the number of the reduction-immersion cycles, and CO adlayer could be electro-oxidized at a much lower potential on the Ru/Pt film electrode than on a Pt film electrode. With in situ attenuated-total-reflection surface-enhanced IR absorption spectroscopy (ATR-SEIRAS), CO molecules adsorbed on both Pt and Ru sites of the Ru/Pt film electrode could be easily identified. In addition to a synergetic effect towards the electrocatalytic oxidation of CO, this as-deposited Ru/Pt film can be appli-cable to in situ ATR-SEIRAS measurements. |
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| Keywords: | CO |
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