A novel dual gas diffusion electrodes system for efficient hydrogen peroxide generation used in electro-Fenton
A novel dual gas diffusion electrodes system for efficient hydrogen peroxide generation used in electro-Fenton
复制标题
DOI：
10.1016/j.cej.2014.11.053
复制
发表时间：
2015-03
影响因子：
15.1
通讯作者：
Xinming Yu;Ming-hua Zhou;Gengbo Ren;Liang Ma
中科院分区：
文献类型：
--
作者：
Xinming Yu;Ming-hua Zhou;Gengbo Ren;Liang Ma
Highly efficient H2O2generation is greatly demanded in electro-Fenton process for organic pollutants degradation. In the present work, a novel H2O2generation reactor using dual gas diffusion electrodes (GDEs) as cathodes was put forward, which was confirmed to be more cost-effective in H2O2generation rate, O2utilization efficiency and energy consumption in comparison with other carbonaceous materials and reactors. The catalyst layer in GDE was characterized and optimized, and the accumulation of H2O2reached to 566 mg/L in 0.05 M Na2SO4at a current density of 7.1 mA/cm2and air flow rate of 0.5 L/min after 180 min. The operational parameters such as current density, pH and air flow rate were optimized, and after 10 times used the production of H2O2was confirmed to be stable. This novel reactor was tested to degrade tartrazine, and even for a high initial concentration of 1000 mg/L, it could be completely decolorized within 60 min while the TOC removal efficiency could reach 66.1% within 120 min with a mineralization current efficiency of 65.1%, indicating its potential for the treatment of high-concentrated wastewaters.
