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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (24): 2847-2852. 上一篇    下一篇

研究论文

电解煤浆制氢阳极的制备及电催化活性研究

印仁和*,1, 吕士银1, 姬学彬1, 洪亮铭1, 曹为民1, 张新胜2   

  1. (1上海大学理学院化学系 上海 200444)
    (2华东理工大学国家重点化学工程联合实验室 上海 200237)
  • 投稿日期:2006-12-30 修回日期:2007-05-29 发布日期:2007-12-28
  • 通讯作者: 印仁和

Preparation of the Catalytic Electrodes and Study on Their Catalytic Activity for Electro-oxidation of Coal Slurry

YIN Ren-He*,1; LÜ Shi-Yin1; JI Xue-Bin1; HONG Liang-Ming1; CAO Wei-Min1; ZHANG Xin-Sheng2   

  1. (1 Department of Chemistry, College of Science, Shanghai University, Shanghai 200444)
    (2 Shanghai National United Chemical Engineering Laboratory, East China University of Science and Technology, Shanghai 200237)
  • Received:2006-12-30 Revised:2007-05-29 Published:2007-12-28
  • Contact: YIN Ren-He

PDF

908

被引次数

19

将钛片进行预处理, 用处理后的钛片作为电极基体, 然后用循环伏安法在钛基体上沉积制备了Pt/Ti, Pt-Ru/Ti, Pt-Ir/Ti, Pt-Ru-Ir/Ti催化电极, 通过扫描电镜(SEM)、X射线衍射(XRD)、电子能谱(EDS)以及等离子发射光谱(ICP)等方法对所制备电极进行了表征, 包括电极表面形貌、组分的沉积状态、催化层成分组成以及电极寿命等; 在煤浆电解过程中, 采用两电极体系, 对所制备电极的电催化活性进行了测试. 结果表明: 所制备的电极催化活性都高于同面积的铂片电极, 含有Ru, Ir的二元催化电极的活性好于镀铂催化电极. 在一定范围内, 随着Ru元素比例增大, 电极活性增强, 而Ir元素含量过大, 电极活性反而稍微降低, 所以Pt-Ir(1∶0.5)/Ti, Pt-Ru(1∶5)/Ti两电极的催化活性相对较好. 本文所制备的三元催化电极的催化活性低于二元催化电极. Pt-Ru/Ti电极催化活性最好, 相同条件下具有最大的电解电流, H2的电解效率可达95%以上.

关键词: 循环伏安, 催化电极, 电催化活性

Ti based metal or composite catalytic electrodes were prepared by depositing Pt-M catalysts on pure Ti substrate in cyclic voltammetry and were characterized by SEM, XRD, EDS and ICP. The electro-catalytic activity of the electrodes prepared for the electro-oxidation of coal slurry was measured in a two electrode system. Results showed that the electro-catalytic activity of the electrodes was far better than that of the pure Pt electrode. The Ir or Ru addition to Pt/Ti can improve the catalytic activity. With the proportion of Ru increasing to a certain extent, the electro-catalytic activity became better. However, the Ir was otherwise. So the Pt-Ir(1∶0.5)/Ti and Pt-Ru(1∶5)/Ti electrodes had the best catalytic activity. The electro-catalytic activity of the ternary electrodes prepared above was not as good as that of the binary electrodes. The Pt-Ru/Ti electrode had the best electro-catalytic activity and its electrolysis efficiency of hydrogen was up to 95%.

Key words: cyclic voltammetry, catalytic electrode, electro-catalytic activity