文献类型：期刊文献

中文题名：高效产H_(2)O_(2)气体扩散电极的研究

英文题名：High-efficienty gas diffusion electrode for the generation of hydrogen peroxide

作者：宋叶青[1];曹礼梅[1];杨骥[1]

机构：[1]华东理工大学资源与环境工程学院,国家环境保护化工过程环境风险评价与控制重点实验室,上海200237

年份：2015

卷号：34

期号：4

起止页码：692

中文期刊名：环境化学

外文期刊名：Environmental Chemistry

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：上海市曙光学者;国家自然科学基金(21277045,21307032);环保部公益性项目(201309021)资助

语种：中文

中文关键词：气体扩散电极;氧还原;H_(2)O_(2);电化学

外文关键词：gas diffusion electrode;oxygen reduction reaction;hydrogen peroxide;electrochemistry.

摘要：采用C/PTFE气体扩散电极在无隔膜体系中进行H_(2)O_(2)发生工艺研究,探讨了石墨和Vulcan XC-72碳黑两种碳材料以及电解电压、p H值对该反应过程的影响.结果表明,在较低的空气流量(1.41 cm^(3)·min^(-1)·cm^(-2))下,以Vulcan XC-72碳黑为表面的气体扩散电极相比石墨电极有较高的H_(2)O_(2)产率和电流效率,碱性条件比酸性条件下H_(2)O_(2)产率和电流效率更好;在2.6 V恒定电压下,2 h后,H_(2)O_(2)浓度达到了250 mg·L^(-1),电流效率从69.8%降到44.7%,单位产量能耗从5.87 k Wh·kg^(-1)升高到9.16 k Wh·kg^(-1).
This study focused on the preparation of C/PTFE gas diffusion electrode and their use for generating hydrogen peroxide in an undivided system.The technique character is that the process could maintain high hydrogen peroxide generation rate,high current efficiency and reasonable energy consumption on the lower aeration rate.The experimental results demonstrated that factors including the carbon species(graphite or Vulcan XC-72),voltage and pH showed apparent influences on the hydrogen peroxide generation.The gas diffusion electrode made of Vulcan XC-72 showed higher hydrogen peroxide generation rate and current efficiency than the GDE made of graphite.And it was also observed that the alkaline pH was beneficial to the hydrogen peroxide generation.The hydrogen peroxide concentration reached 250 mg·L^(-1)after 2 h,and current efficiency declined from 69.8%to 44.7%,while energy consumption increased from 5.87 kWh·kg^(-1)to 9.16 kWh·kg^(-1),when the aeration rate was 1.41 cm^(3)·min^(-1)·cm^(-2),and the voltage was 2.6 V.