Study of Electrochemical Properties of Ni(OH)_2 /NiOOH with Spectroscopic Ellipsometry

用现场光谱椭圆偏振技术和电化学实验方法研究了Ｎｉ（ＯＨ）＿２／ＮｉＯＯＨ体系中的电化学反应．拟合椭圆偏振光谱的实验数据确定了阴、阳极过程中镍电极上表面膜的转化模型，结果表明：在镍表面上离子注入钻之后，表面膜转化模型基本保持不变，但Ｎｉ（ＯＨ）＿２／ＮｉＯＯＨ间电化学反应的性质受到明显影响．Electrochemical reactions of Ni(OH)_2 /NiOOH system were studied by using in-situ spectroscopic ellipsometry and the conventional electrochemical metheds.By fitting data fromellipsometric measurements,a transformation medel of the surface film was obtained for cathedic andanodic processes. The results indicated that the transformation medel after cobalt implantation almostremained the same as that before cobalt implantation,but the electrochemical properties wereaffectedobviously by implantation of cobalt.作者联系地址：重庆大学应用化学系Author's Address: Department of Applied Chemistry Chongqing University, Chongqing 63004

Investigation on the Ellipsometry for the Detection of Nickel Through Anodic Stripping Voltammetry

阳极溶出伏安法测定镍的椭圆法研究①朱伟杨雨如黄宗卿＊（重庆大学应用化学系重庆４０００４４）电极表面准单分子层上发生的物理或化学变化能使入射的椭圆偏振光的光学参量发生明显的变化，理论分析和实验测定均表明椭圆法可灵敏地提供电极表面０．１ｎｍ厚度层内发生变...The ellipsometry with a new parameter Vop and anodic stripping voltammetry are used to analyze the nickel ions solutions with different concentration of 10-6～10-9 mol/L. It is shown that the results given by both methods are identical and the sensitivity and accuracy of ellipsometry are higher than anodic stripping voltammety.作者联系地址：重庆大学应用化学系Author's Address: Dept. of Appiled Chem., Chongquing Univ., Chongqing 40004

Study on Mass Transport in Liquid Layer Adjacent to the Electrode Through Transmission Vop-Spectroellipsometry

　通常的电化学研究中,有关电极附近液层参与反应粒子的传质过程多局限于理论分析,其实验研究,即使应用Fick定律分析液相的扩散传质现象,也多限于简单的均态体系.对于复杂多相体系的液相传质问题,更近乎束手无策.鉴于液相传质研究在理论上和实际应用中的重要性,作者等近年采用透射Vop光谱椭圆法对电化学体系中的传质过程进行了实验探索,本文扼要介绍该法的研究概况.In electrochemical system, the mass transport process in liquid layer adjacent to electrode is studied through theoretical analysis only.The diffusion process can be analyzed theoretically by Fick's law for homogeneous media. Up to now, none of satisfied experimental method has been reported for studying mass transport of a whole process in liquid media yet. This paper described the experimental approach to explore mass transport in electrochemical system by transmission Vop-spectroellipsometry briefly.作者联系地址：重庆大学化学化工学院,重庆大学化学化工学院,重庆大学化学化工学院 重庆400044 ,重庆400044 ,重庆400044Author's Address: Institute of Chemistry and Chemical Engineering, Chongqing UniversityChongqing 400044, Chin

A Study of Monitoring Corrosion of Metal Via an Optic Waveguide Sensing Method

本文提出一种用于金属腐蚀监测的光波导传感方案 ,用金属膜层局部取代光波导的介质包层 ,构成腐蚀敏感膜 ,从而获取金属腐蚀信息 .依据波导理论选用 72 1比色皿上的石英玻璃作为光波导材料 ,利用电化学方法在波导材料内表面上形成Fe C合金腐蚀敏感膜 ,并用XRD、EDX等对膜层结构进行分析 .在电化学腐蚀膜的同时 ,用光学方法记录光波导输出光功率的变化 ,实验结果表明电化学方法与光学方法获取的腐蚀信息同步 ,证实了所提传感方案可行An optical wave guide sensing method was proposed for monitoring corrosion of metal in outdoors steel structures. Replacing the cladding of wave guide with metal film in a particular location, the method takes the metal film as the corrosion sensitive film. The experiment of waveguide sensor was carried out on a 721 colorimetric vessel, with which the soution is held in itself and the light is propagated in its sidewall. A Fe C alloy film was electroplated onto the inner sied of vessel to form the corrosion sensitive film. The structure of the Fe C alloy film was studied by XRD、EDX and burning gas capacity method.The comparison test of optics and electrochemistry was used to eveluate the sensing ability of the film; it's shown that the light propagating in the opitical waveguide is affected by the polarization current. The result demonstrated the feasibility of using optical fiber corrosion sensors for monitoring corrosion of outdoor steel structures.作者联系地址：光电技术及系统教育部重点实验室,重庆大学!四川重庆400044,光电技术及系统教育部重点实验室,重庆大学!四川重庆400044,光电技术及系统教育部重点实验室,重庆大学!四川重庆400044,重庆大学化学化工学院!四川重庆400044,重庆大学化学化工学院!四川重庆400044Author's Address: 1.The Key Labor. for Optoelectronic Tech. & System, The Mini. Edu. Commission of China, Chongqing Univ., Chongqing 400044, China 2.Dept. of Applied Chem

Study on Electrochemical Reactions of K 4 Fe(CN) 6 /K 3 Fe(CN) 6 with Graze Ellipsometry

提出掠射椭圆偏振测试技术的实验方案，应用该掠射式技术结合循环伏安法研究了在镀有Ｉｎ２Ｏ３玻璃片上进行的Ｋ４〔Ｆｅ（ＣＮ）６〕／Ｋ３〔Ｆｅ（ＣＮ）６〕电极反应．结果证明：掠射椭圆偏振术可在电化学反应过程中现场测定椭圆偏振参数及其变化规律，这些规律与所发生的表面电化学反应规律相对应，由此可以对电极体系进行研究；现场掠射椭圆偏振术还能用于分析表面扩散层的性质，弥补其它界面研究方法的缺陷．A measurement technology of ellipsometry called graze was put forward. Electrochemical reactions of K 4 Fe(CN) 6 /K 3 Fe(CN) 6 on glass electrode deposited indium oxide were studied with both the graze ellipsometry and cycilic voltammetry. The results indicated that ellipsometric parameter and its change during the electrochemical reactions could be confirmed with graze ellipsometry, and the regularity was corresponding to the process of electrochemical reaction. So study for electrode system could be processed with the graze ellipsometry. The graze ellipsometry could also be applied to analyze properties of diffusion layer and prosthesis limitations of other technologies.作者联系地址：重庆大学化学化工学院Author's Address: Coll. of Chem. and Chem. Engin., Chongquing Univ., Chongqing 63004