高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (4): 701.doi: 10.7503/cjcu20150795

• 物理化学 • 上一篇    下一篇

低温海水用钛基金属氧化物阳极的制备与性能

王锐1(), 王廷勇2, 徐海波3   

  1. 1. 青岛大学应用技术学院, 青岛 266071
    2. 青岛双瑞海洋环境工程股份有限公司, 青岛 266101
    3. 中国海洋大学化学化工学院, 青岛 266100
  • 收稿日期:2015-10-15 出版日期:2016-04-10 发布日期:2016-03-22
  • 基金资助:
    山东省博士基金(批准号: BS2010NJ018)资助

Preparation and Electrocatalytic Properties of Metal Oxide-coated Titanium Anodes Used in Low-temperature Seawater

WANG Rui1,*(), WANG Tingyong2, XU Haibo3   

  1. 1. College of Vocational and Technical Education, Qingdao University, Qingdao 266071, China
    2. Qingdao Sunrui Marine Environment Engineering Co., Ltd., Qingdao 266101, China
    3. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
  • Received:2015-10-15 Online:2016-04-10 Published:2016-03-22
  • Contact: WANG Rui E-mail:957599038@qq.com
  • Supported by:
    † Supported by the Doctor Foundation of Shandong Province, China(No.BS2010NJ018)

摘要:

将TiN纳米粉体与TaCl5正丁醇饱和溶液混合制得中间层涂覆液, 通过热分解法在不同焙烧温度下得到了含有中间层的Ti/(Ti-Tax)O2/IrO2电极, 并与相同工艺下得到的传统Ti/IrO2电极进行对比分析. 采用X射线衍射和扫描电子显微镜对制备的电极进行了表征, 通过循环伏安曲线、 极化曲线和恒流加速寿命测试等电化学手段对电极性能进行了分析. 结果表明, 引入中间层可以使Ti/(Ti-Tax)O2/IrO2电极400 ℃低温焙烧样品表层IrO2结晶发育更好, 得到了通常高温下才具有的典型龟裂纹形貌; 相对于500 ℃高温焙烧样品, 其在海水中的电化学活性表面积提高近6倍, 在4 ℃和100 mA/cm2电流密度下的电极电位(1.37 V)降低100 mV, 催化性能得到显著提高; 同时加速寿命相对于传统的Ti/IrO2电极提高10倍以上, 是一种适用于低温海水环境的、 具有较高活性和耐久性的新型阳极.

关键词: 船舶压载水, 电解海水, 钛基金属氧化物阳极, 氮化钛, 氧化铱

Abstract:

Ti/(Ti-Tax)O2/IrO2 anodes with middle coating were made by thermal decomposition at different temperatures, while the middle coating was made from a mixture of TaCl5-butanol saturated solution with TiN nano-powder. Compared with the traditional Ti/IrO2 anodes, these new anodes were characterized by X-ray diffraction(XRD) and scanning electron microscope(SEM), and studied by electrochemical measurements such as polarization curve, cyclic voltammetry and acce-lerated life test. The results revealed that for Ti/(Ti-Tax)O2/IrO2 anodes calcinated at 400 ℃, the addition of middle coating acquired a much better IrO2 crystallization at the surface and a cracked-mud morphology which was usually obtained at high temperature. Furthermore, compared with the anode calcinated at 500 ℃, the electrocatalytic activity of the anode prepared at 400 ℃ was highly raised, its electrochemical active area was increased by 6 times, and the working potential was decreased by 100 mV(to 1.37 V) at a current density of 100 mA/cm2 in 4 ℃ seawater. Meanwhile, the accelerated life was increased by 10 times, compared with the Ti/IrO2 anode prepared by traditional method. Therefore, the newly developed anodes are suitable to be used in low-temperature seawater with good electrocatalytic property and stability.

Key words: Ship’s ballast water, Electrolysis of seawater, Metal oxide-coated titanium anode, Titanium nitride, Iridium oxide

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