| Pt 电极上 CO2水解析氢反应的研究 |
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| 引用本文： | 廉颖,沙作良,陈兢鸢.Pt 电极上 CO2水解析氢反应的研究[J].天津科技大学学报,2012(4):44-47,56. |
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| 作者姓名： | 廉颖 沙作良 陈兢鸢 |
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| 作者单位： | 1. 天津市海洋资源与化学重点实验室,天津科技大学海洋科学与工程学院,天津300457
2. 日本福井大学物理工学部,福井910-0017 |
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| 摘 要： | 利用循环伏安法,研究了CO2-H2O 体系在 Pt 电极上的析氢反应,与单纯析氢反应相比,还原峰电位发生负偏移,还原峰电位为-0.5,V.并通过计算,得出在 pH=4附近 CO2扩散系数D =3.02×10-10,m2/s,H+扩散系数CO 2 D =+H 4.93×10-9,m2/s,电极表面的反应层厚度D k cμ=/(0 b-及 H+的浓度分布函数) c c++ΗΗ-=10 H+HCO exp{-x k c 0 b HCO-/D +H}].33为电流法测定 CO2气体浓度的方法提供了基础参考数据
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| 关 键 词： | 二氧化碳 循环伏安法 前置化学反应 析氢反应 反应层 |
Hydrogen Evolution Reaction in CO2 Solution on Pt Electrode |
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| LIAN Ying,SHAZuoliang,CHEN Jingyuan.Hydrogen Evolution Reaction in CO2 Solution on Pt Electrode[J].Journal of Tianjin University of Science & Technology,2012(4):44-47,56. |
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| Authors: | LIAN Ying SHAZuoliang CHEN Jingyuan |
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| Institution: | 1.Tianjin Key Laboratory of Marine Resource and Chemistry,College of Marine Science and Engineering,Tianjin University of Science & Technology,Tianjin 300457,China;2.Department of Applied Physics,University of Fukui,Fukui-shi 910-8507,Japan) |
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| Abstract: | The research used cyclic voltammetry to obtain stable voltammograms of HER in CO 2-H 2 O system on Pt electrode.Compared with the voltammograms of HER in HCl-H 2 O system,the reductive potential(Epc=-0.5)shows negative shift.The diffusion coefficient of H +,CO 2,the width of reaction layer and the function of concentration distribution of CO 2 were calculated.The values are 2 CO D =3.02×10-1 0,m 2 /s,+ H D =4.93×10-9,m 2 /s,μ,= + 3 0 b H HCO D /(k c),c = + Η 3 0 0 b HCO H c 1 exp x k c /D + + Η { }]--,respectively.These parameters are of fundamental significance in using electrochemical technology to detect CO 2. |
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| Keywords: | carbon dioxide cyclic voltammetry prior chemical reaction hydrogen evolution reaction layer |
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