Electrogeneration of hydrogen peroxide for electro-Fenton system by oxygen reduction using chemically modified graphite felt cathode
Electrogeneration of hydrogen peroxide for electro-Fenton system by oxygen reduction using chemically modified graphite felt cathode
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化学改性石墨毡阴极氧还原电 Fenton 系统电产生过氧化氢
DOI：
10.1016/j.seppur.2013.03.038
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发表时间：
2013-06
影响因子：
8.6
通讯作者：
Zhou M.H.
中科院分区：
文献类型：
--
作者：
Zhang C.;Bi Z.H.;Jin T.;Zhou M.H.
首次采用一种以水合肼为主要试剂的简单化学方法对阴极石墨毡进行了改性，以实现高效的电Fenton工艺。对比研究了不同浓度的水合肼对过氧化氢的产率和电流效率的影响，证实了修饰后的阴极具有更高的电催化活性。在相同条件下，水合肼的最佳浓度为10%，过氧化氢的产率为未改性的2.6倍。循环伏安分析表明，与未修饰的阴极相比，修饰后的阴极具有更强的电流响应和更大的负析氢电位。对阴极电位、pH值、氧气流量等操作参数进行了优化，以实现高效的过氧化氢发电。当−为0.75V(vs.SCE)、氧气流量为0.4L/m in时，H_2O_2的积累量最大，达247.2 mg/m in。PH对H_2O_2产率影响不大，但对电流效率有明显影响。结果表明，在酸性和中性pH条件下，该修饰电极均能有效地降解对硝基苯酚，表明化学修饰对电极性能有积极的影响。
A simple chemical method using hydrazine hydrate as the main reagent was firstly used to modify graphite felt as cathode for efficient electro-Fenton process. The influences of the different concentration of hydrazine hydrate were comparatively studied on the yield and current efficiency of H2O2production, confirming that the modified cathode had much higher electrocatalytic activity. The optimum concentration of the hydrazine hydrate was 10%, and the yield of H2O2was as 2.6 times as that without modification under the same conditions. The cyclic voltammetry analysis indicated that the modified cathodes exhibited stronger current responses and more negative hydrogen evolution potentials than the unmodified one. The operational parameters such as cathodic potential, pH and O2flow rate were optimized for the efficient H2O2electrogeneration. The maximum accumulation of H2O2, up to 247.2mg/L, was obtained at −0.75V (vs. SCE) and O2flow rate of 0.4L/min. The influence of pH on the yield of H2O2was slight, but it was obvious on current efficiency. The modified cathode was confirmed to be more efficient in degradation of p-nitrophenol by electro-Fenton process at both acidic and neutral pH, indicating the positive effect of chemical modification onto the performance.
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影响因子：
12.8
作者：
Qiang, ZM;Chang, JH;Huang, CP
通讯作者：
Huang, CP
影响因子：
6.6
作者：
M. Zarei;D. Salari;Aligoli Niaei;A. Khataee
通讯作者：
M. Zarei;D. Salari;Aligoli Niaei;A. Khataee
影响因子：
6.6
作者：
Panizza, Marco;Oturan, Mehmet A.
通讯作者：
Oturan, Mehmet A.
双阴极电芬顿氧化结合阳极氧化系统用于4-硝基苯酚降解
影响因子：
13.6
作者：
Chu, Y. Y.;Qian, Y.;Deng, X. L.
通讯作者：
Deng, X. L.
影响因子：
13.6
作者：
Ming-hua Zhou;Qin-Bo Tan;Qian Wang;Yongli Jiao;N. Oturan;M. Oturan
通讯作者：
Ming-hua Zhou;Qin-Bo Tan;Qian Wang;Yongli Jiao;N. Oturan;M. Oturan