Coupled nitrate-to-ammonia reduction and persulfate production for ciprofloxacin removal via Cu2O/Cu nanorod and BDD electrodes

文献类型： 外文期刊

第一作者： Liao, Guanting

作者： Liao, Guanting;Yang, Bowen;Qi, Xinhua;Smith Jr, Richard L.;Guo, Haixin;Su, Yaqiong

作者机构：

关键词： Electrocatalysis; Neutral medium; Nitrate-to-Ammonia; Coupling reaction system; Persulfate production

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：11.3； 五年影响因子：12.4 ）

ISSN： 0304-3894

年卷期： 2025 年 496 卷

页码：

收录情况： SCI

摘要： Electrocatalytic nitrate reduction (NO3RR) processes that use actual aqueous nitrate pollution as a feedstock for ammonia production have two chief challenges for realization: (i), conversions are limited to neutral conditions and (ii) electrocatalysts are unable to drive nitride protonation while inhibiting hydrogen evolution. Herein, a facile electrodeposition method was applied to prepare Cu2O/Cu nanorods on copper support, which exhibited an ammonia production rate of 454.1 mu mol h-1 cm-2 and Faraday efficiency of 96.8 % at-0.9 V versus a reversible hydrogen electrode in neutral medium. Through application of a boron doped diamond electrode in anodic bath, persulfate production of 310.2 mu mol h-1 cm-2 (18.2 % improvement in Faraday efficiency) afforded simultaneous degradation of a nitrogen-containing contaminant (ciprofloxacin). The high electron density of Cu sites on Cu2O/ Cu inhibited competing hydrogen evolution and accelerated nitrate transformation. Generation of oxidative radicals (SO4 center dot- and center dot OH) on boron doped diamond electrode in sulfate electrolyte showed the possibility for simultaneous degradation of organic pollutants.

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