| 电极转速对甲醇电化学氧化还原行为的影响 |
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| 引用本文： | 朱永春,陈庆阳.电极转速对甲醇电化学氧化还原行为的影响[J].沈阳师范大学学报(自然科学版),2006,24(2):212-214. |
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| 作者姓名： | 朱永春 陈庆阳 |
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| 作者单位： | 沈阳师范大学,化学与生命科学学院,辽宁,沈阳,110034 |
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| 摘 要： | 以旋转线扫伏安和旋转循环伏安法研究了甲醇的电化学氧化还原过程中电极旋转速度的影响.电极旋转增加了CO在电极表面上的吸附量,增大其毒化作用,较大程度地减小氧化和还原电流.转速的影响随电位区域不同而不同,在较低电位下(<0.65 V),氧化过程为电化学动力学控制,旋转的影响较大;电位较正时(>0.65 V),氧化过程为扩散控制,旋转的影响较小.CO在电极表面上的吸附量的相对增加,使CO脱附引起的氧化电流也相对增加.
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| 关 键 词： | 旋转伏安法 旋转线扫伏安法 甲醇 电化学氧化还原 铂电极 |
| 文章编号： | 1673-5862(2006)02-0212-03 |
| 收稿时间： | 2005-11-14 |
| 修稿时间： | 2005年11月14 |
Influence of Rotation Rates on Electro-Oxidation of Methanol by Rotation Linear and Cyclic Voltammetry |
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| ZHU Yong-chun,CHEN Qing-yang.Influence of Rotation Rates on Electro-Oxidation of Methanol by Rotation Linear and Cyclic Voltammetry[J].Journal of Shenyang Normal University: Nat Sci Ed,2006,24(2):212-214. |
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| Authors: | ZHU Yong-chun CHEN Qing-yang |
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| Institution: | Chemistry Department, Chemistry and Life Science College, Shenyang Normal University, Shenyang 110034, China |
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| Abstract: | The electro-oxidation of methanol in aqueous solution was investigated by linear and cyclic voltammetry with platinum rotation disk electrode.Even smaller rotation rate(200?rpm) can greatly decrease both of oxidation and reduction currents due to the relatively increasing CO adsorption on electrode surface.Rotation greatly influences kinetically controlled oxidation process at lower potential(<0.65?V) rather than the diffusion controlled one at more positive potential(>0.65?V),and increases oxidation current of methanol due to CO desorption in returning scan. |
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| Keywords: | Rotation voltammetry electrochemical oxidation methanol platinum electrode |
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