| 活性炭纤维电极电还原产H2O2的实验研究 |
| 摘要点击 2494 全文点击 2377 投稿时间：2010-04-04 修订日期：2010-07-22 |
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| 中文关键词 活性炭纤维 H2O2 电Fenton 电还原 动力学模型 |
| 英文关键词 activated carbon fiber (ACF) H2O2 electro-Fenton electro-reduction kinetic model |
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| 中文摘要 |
| 利用活性炭纤维作为阴极，比较了活性炭纤维电极和石墨板电极产H2O2的浓度，并对影响活性炭纤维电极产H2O2的因素(pH、电流密度和电解质浓度)进行了研究.研究发现，活性炭纤维电极电还原产生H2O2的浓度远大于石墨板电极.当实验在pH=3.00、电流密度8.89 mA/cm2和电解质(Na2SO4)浓度0.05 mol/L的条件下，240 min的电解时间内电还原产生H2O2的浓度最高可达556.11 μmol/L. 但是，由于大量副反应的发生，该系统与其他电解系统相比，其电还原产H2O2的电流效率偏低；此外，建立了一个活性炭纤维电极电还原产H2O2的新动力学模型，通过对实验数据的拟合，结果表明该模型与实际结果具有很好的相关性. |
| 英文摘要 |
| The comparative study on the electro-generation of H2O2 using an activated carbon fiber cathode and graphite cathode was investigated. The effect of the operating parameters on the H2O2 generation concentration and current efficiency, such as the initial pH, current density and electrolyte concentration, was also evaluated. The results revealed that the activated carbon fiber cathode was more effective compared to the graphite cathode. The maximum value of H2O2 concentration could be achieved with pH 3.00, current density 8.89mA/cm2 and electrolyte concentration 0.05 mol/L. However, due to the formation of competitive electrode reactions, the current efficiency of this electrolysis system is lower than other electrolysis system. In addition, a new kinetic model was established to well describe the electro-generation of H2O2. The experimental data were fitted well using the kinetic model. |
