• 关键词：电催化还原  泡沫铜  脱硝  络合液  Fe（Ⅱ）EDTA-NO

• 基金项目：国家工业和信息化部重点研发计划（No.CDG01-KT16）；中央高校基本科研业务费专项（No.215220002）

• 王浩强
• 武汉理工大学化学化工与生命科学学院，武汉 430070

• 张光旭
• 武汉理工大学化学化工与生命科学学院，武汉 430070

• 刘士豪
• 武汉理工大学化学化工与生命科学学院，武汉 430070

• 严小妹
• 武汉理工大学化学化工与生命科学学院，武汉 430070

• 胡紫瑞
• 武汉理工大学化学化工与生命科学学院，武汉 430070

• 摘要：氮氧化物会对环境造成严重的污染，对其治理已成为亟待解决的问题.络合脱硝是一种快速简便的脱硝方法，但其还原再生仍是一个 难点.选取泡沫铜电极作为阴极，构建了一套电催化还原体系对Fe（Ⅱ）EDTA-NO溶液进行还原再生.扫描电镜（SEM）、X射线衍射（XRD）分析和重复实验结果表明，泡沫铜电极在电催化还原过程中具有很好的稳定性.对反应动力学进行拟合，结果发现，其遵循一级反应动力学.通过探究阴极电位、络合液初始pH对电催化还原过程中反应速率、选择性和法拉第效率的影响，得出最优条件为：阴极电位为-1.2 V（vs. MSE）， 初始pH为2.0.在最优条件下，络合液中NO的还原率可达76.6%，氨选择性为36.5%，法拉第效率为52.7%.

• Abstract：Nitrogen oxides caused serious pollution to the environment which have become an urgent problem to be solved. Complexing denitrification is supposed to be a fast and simple method to reduce nitrogen oxides. However， it is still difficult to achieve regeneration complexing denitrification solution through reduction. Herein， the copper foam electrode was selected as the cathode and constructed a set of electrocatalytic reduction system to reduce the Fe（Ⅱ）EDTA-NO solution. The results of electron microscopy （SEM）， X-ray diffraction （XRD） analysis and repeated experiments confirmed that the copper foam electrode has good stability during the electrocatalytic reduction process. Fitting the reaction kinetics has shown that it follows the first-order reaction kinetics. By exploring the influence of the cathode potential and the initial pH of the complexing solution on the reaction rate， selectivity and Faraday efficiency in the electrocatalytic reduction process， it is concluded that the optimal conditions were as follows： the cathode potential is -1.2V （vs. MSE） and the initial pH is 2.0. Under the optimal conditions， the reduction rate of NO in the complexing solution could reach 76.6% with 36.5% ammonium selectivity， and the Faraday efficiency was 52.7%.

• Key words：electrocatalytic reduction  copper foam  denitrification  complexing solution  Fe（Ⅱ）EDTA-NO

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