| 酸溶液中氧在Ti/RuO2+TiO2电极上阳极析出动力学与机理研究 |
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| 引用本文： | 金世雄,王岚.酸溶液中氧在Ti/RuO2+TiO2电极上阳极析出动力学与机理研究[J].物理化学学报,1990,6(2):134-138. |
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| 作者姓名： | 金世雄 王岚 |
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| 作者单位： | Department of Chemistry, Nankai University |
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| 摘 要： | 本文通过在酸溶液中Ti/RuO_2+TiO_2电极上氧阳极析出动力学的研究, 表明酸溶液中氧阳极析出的极化曲线同样具有两Tafel区. 低极化区的Tafel斜率? φ/?lgi=2.303RT/(1+β)F(即0.039 V, 其中β=0.5). 高极化区为?φ/?lg i=2.303RT/βF(即0.118 V). 在前一区域内氧析出反应对于水分子活度(α_w)的反应级数为4, 即i～α_w~4. 后一区域内则为2, 即i～α_w~2. 实验结果表明, 酸溶液中上述电极上氧阳极析出是按反应序列(1)、(2)进行的
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| 关 键 词： | 氧 阳极折出 酸溶液 电极 |
| 收稿时间： | 1988-09-20 |
| 修稿时间： | 1989-01-20 |
Kinetics and Mechanism of Oxygen Evolution at Ti/RuO2+TiO2 Anodes in Acid Solutions |
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| Jin Shi-Xiong,Wang Lan.Kinetics and Mechanism of Oxygen Evolution at Ti/RuO2+TiO2 Anodes in Acid Solutions[J].Acta Physico-Chimica Sinica,1990,6(2):134-138. |
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| Authors: | Jin Shi-Xiong Wang Lan |
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| Institution: | Department of Chemistry, Nankai University |
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| Abstract: | The kinetics of anodic O_2 evolution on Ti/RuO_2+TiO_2 anodes was studied in acid solutions, by with two Tafel regions have been confirmed. At low current densities i.e. the first Tafel region ?φ/lgi=2.303RT/((1+β)F, whereas at high cds i. e. second Tafel region it is 2.303RT/βF. In the low current densities region, the reaction order with respect to α_w is 4. For the second Tafel region the reaction order is 2. The kinetic data obtained show that the rate determining step of the anodic evo-lution of oxygen on Ti/RuO_2+TiO_2 anodes in acid solutions is... |
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