| Pt电极表面及附近水行为的现场红外反射吸收光谱电化学初探 |
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| 引用本文： | 张久俊,陆君涛,查全性,冯子刚. Pt电极表面及附近水行为的现场红外反射吸收光谱电化学初探[J]. 物理化学学报, 1990, 6(3): 318-322. DOI: 10.3866/PKU.WHXB19900313 |
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| 作者姓名： | 张久俊 陆君涛 查全性 冯子刚 |
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| 作者单位： | Chemistry Department, Wuhan University, Wuhan;Center of Analysis, Wuhan University, Wuhan |
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| 摘 要： | 本文用现场红外反射吸收光谱电化学方法和循环伏安法研究了Pt电极表面及附近水的行为. 据不同范围内得到的SNIFTIRS 谱中水峰的变化提出了三种可能的解释: (A)电极上水的吸附取向的改变; (B)电极附近水分子的长程有序的变化; (C)电极上水的氧化及还原, Pt-O化合物的形成导致薄层中水量的减少。
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| 关 键 词： | 铂电极 水分子取向 红外光谱 |
| 收稿时间： | 1988-11-22 |
| 修稿时间： | 1989-06-09 |
An In-Situ FTIR Reflection-Absorption Spectroscopic Study of Water on and Near Pt Electrode Surface |
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| Zhang Jiu-Jun,Lu Jun-Tao,Zha Chuan-Sin,Feng Zi-Gang. An In-Situ FTIR Reflection-Absorption Spectroscopic Study of Water on and Near Pt Electrode Surface[J]. Acta Physico-Chimica Sinica, 1990, 6(3): 318-322. DOI: 10.3866/PKU.WHXB19900313 |
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| Authors: | Zhang Jiu-Jun Lu Jun-Tao Zha Chuan-Sin Feng Zi-Gang |
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| Affiliation: | Chemistry Department, Wuhan University, Wuhan;Center of Analysis, Wuhan University, Wuhan |
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| Abstract: | The behaviour of the water on and near the electrode surface in 1.0 mol·dm~(-3) NaF were studied using in-situ FTIR reflection-absorption spectroscopy and cyclic voltammetry. Two mechanisms are proposed to explain the change of water signal in the potential range -0.7 to -0.3 V(vs. SCE)——the change of ordered state of the water molecules near electrode and the formation of adsorbed hydrogen at the cost of the water in the thin layer solution. In the potential range -0.3 to 0.4 V, the orientation of adsorbed OH~- is thought to change from being parallel t perpendicular to the electrode surfacewith in creasing potential. In the range 0.4 to 0.8 V, the slight decrease of water ignal is attributed to thee consum ption of adsorbed OH~- on the formation of Pt-OH on the electrode. |
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