IrO_2电极在含有机小分子水溶液中的电化学活性
Electrochemical Activities of IrO_2 Electrodes in Small Organic Molecules Containing Aqueous Solutions
查看参考文献31篇
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文摘
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通过循环伏安(CV)与电化学阻抗谱(EIS)测试研究了Ti基IrO_2系活性涂层电极在含甲醇、甲酸及甲醛三种有机小分子的Na_2SO_4溶液中的电化学活性,其中以电极/溶液界面的双电层电容来表征电极的活性.结果表明,与同浓度Na_2SO_4溶液相比,该电极在Na_2SO_4溶液中的电化学活性发生明显下降.有机小分子的加入降低了电极的活性表面积.发现有机物能在较宽的电位范围内发生氧化反应,但在该种电极上的电氧化速率较慢.然而,伴随着析氧反应的发生,有机物的氧化也随之加快. |
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其他语种文摘
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The electrochemical activities of Ti based IrO_2 active coating electrodes in Na2SO,i aqueous solutions containing methanol, formic acid and formaldehyde, respectively, were investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) .The activity was quantitatively characterized by the double-layer capacitance, Gu. The results showed that in comporison with that in Na_2SO_4 electrolyte the electrode activity in Na_2SO_4 solution with the same concentration declines dramatically. The active surface area of the electrodes was also found to decrease in the presence of these small organic moleculars. It was found that the electrooxidation of organic compounds can take place in a wide potential region, but with a slow reaction rate. The organic oxidation is facilitated by the oxygen evolution on this type of electrode. |
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来源
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物理化学学报
,2004,20(7):740-744 【核心库】
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关键词
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IrO_2电极
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甲醇
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甲酸
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甲醛
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电化学活性
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地址
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浙江大学化学系, 杭州, 310027
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-6818 |
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学科
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化学 |
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基金
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国家973计划
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文献收藏号
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CSCD:1584971
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