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化学学报
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化学学报 ›› 2001, Vol. 59 ›› Issue (12): 2063-2069. 上一篇    下一篇

研究论文

Ce^4^+/Ce^3^+-V^2^+/V^3^+氧化还原流动电池的可行性研究2: 旋转圆盘(RDE) 与旋转环盘(RRDE)法对Ce^4^+/Ce^3^+氧化还原体系的研究

夏熙;刘洋;刘洪涛   

  1. 新疆大学应用化学研究所.新疆(830046)
  • 发布日期:2001-12-15

Studies on feasibility of Ce^4^+/Ce^3^+-V^2^+/V^3^+ redox flow cell 2: Investigation of Ce^4^+/Ce^3^+ redox system by RDE and RRDE

Xia Xi;Liu Yang;Liu Hongtao   

  1. Xinjiang Univ, Inst Appl Chem.Xinjiang(830046)
  • Published:2001-12-15

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被引次数

2

用RDE与RRDE法研究了Ce^4^+/Ce^3^+-V^2^+/V^3^+氧化还原流动电池中Ce^4^+/Ce^3^+体系的电化学动力学参数，以说明组成该新型氧化流动电池的可能性。用RDE法得出在铂电极表面与玻碳电极上均会生成一层氧化膜，对Ce^3^+的氧化的反应产生阻碍作用。但在铂上的氧化膜对Ce^4^+的还原反应却有催化作用。用RRDE法得出Ce^3^+在玻碳电极上的氧化与析氧之间存在着竟争，为得到高的Ce^3^+氧化效率，应控制氧化电流在2～8mA.cm^-^2之间。

关键词: 铈, 钒, 氧化还原反应, 氧化膜, 流动电池

Some electrochemical kinetic parameters of Ce^4^+/Ce^3^+ system have been obtained by means of RDE and RRDE techniques, which demonstrated the feasibility of assembling a completely new Ce^4^+/Ce^3^+- V^2^+/V^3^+ redox flow cell. One layer of oxidation film forms at the surface of both Pt and GC electrodes in such system, which inhibits the oxidation of Ce^3^+ on both electrodes while enforces the reduction of Ce^4^+ on the Pt. There is also a competition between the oxidation of Ce^3^+ and the evolution of O2, therefore the anodic current density should be strictly controlled in the range of 2～8 mA. cm^-^2 for obtaining higher oxidation efficiency of Ce^3^+.

Key words: CERIUM, VANADIUM, OXIDATION REDUCTION REACTION, OXIDE FILM

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