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A modular functionalized anode for efficient electrochemical oxidation of wastewater: Inseparable synergy between OER anode and its magnetic auxiliary electrodes.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-01-22 , DOI: 10.1016/j.jhazmat.2020.122174 Dan Shao 1 , Yuanyuan Zhang 1 , Wei Lyu 2 , Xinlei Zhang 3 , Guoqiang Tan 1 , Hao Xu 4 , Wei Yan 4
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-01-22 , DOI: 10.1016/j.jhazmat.2020.122174 Dan Shao 1 , Yuanyuan Zhang 1 , Wei Lyu 2 , Xinlei Zhang 3 , Guoqiang Tan 1 , Hao Xu 4 , Wei Yan 4
Affiliation
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Oxygen evolution reaction (OER) anodes, (e.g., IrO2) are well-known inefficient catalysts for electrochemical oxidation (EO) of refractory organics in wastewater due to the high energy consumption via OER. However, in this study this kind of anode participated in a very effective EO process via a specific modular anode architecture. Traces of magnetic Fe3O4/Sb-SnO2 particles as auxiliary electrodes (AEs) were attracted on the surface of the two-dimensional (2D) Ti/IrO2-Ta2O5 by a NdFeB magnet, and thereby constituted a new magnetically assembled electrode (MAE). MAE could be renewed by recycling its AEs. The electrochemical properties as well as the EO performances of the MAE could be regulated by adjusting the loading amount of AEs. Results showed that even a small amount of AEs could increase surface roughness and offer massive effective active sites. When removing color of azo dye Acid Red G, the optimal MAE exhibited ∼1100 % and ∼500 % higher efficiencies than 2D Ti/IrO2-Ta2O5 and 2D Ti/Sb-SnO2, respectively. The superiority of the MAE was also applicable in degrading phenol. The synergy between Ti/IrO2-Ta2O5 and magnetic Sb-SnO2 particles was therefore discussed.
中文翻译：
用于废水的有效电化学氧化的模块化功能化阳极：OER阳极与其磁性辅助电极之间不可分割的协同作用。
氧气析出反应（OER）阳极（例如IrO2）是众所周知的效率低下的催化剂，用于废水中难熔有机物的电化学氧化（EO），因为通过OER消耗大量能量。但是，在这项研究中，这种阳极通过特定的模块化阳极体系结构参与了非常有效的EO工艺。NdFeB磁体将痕量的Fe3O4 / Sb-SnO2磁性颗粒作为辅助电极（AEs）吸附在二维（2D）Ti / IrO2-Ta2O5的表面上，从而构成了一个新的磁性组装电极（MAE）。可以通过回收其AE来更新MAE。MAE的电化学性质和EO性能可以通过调节AE的负载量来调节。结果表明，即使少量的AE也会增加表面粗糙度并提供大量有效的活性位点。当去除偶氮染料酸性红G的颜色时，最佳MAE的效率分别比2D Ti / IrO2-Ta2O5和2D Ti / Sb-SnO2高约1100％和约500％。MAE的优越性也适用于降解苯酚。因此，讨论了Ti / IrO2-Ta2O5与磁性Sb-SnO2颗粒之间的协同作用。
更新日期：2020-01-22
中文翻译：
用于废水的有效电化学氧化的模块化功能化阳极：OER阳极与其磁性辅助电极之间不可分割的协同作用。
氧气析出反应（OER）阳极（例如IrO2）是众所周知的效率低下的催化剂，用于废水中难熔有机物的电化学氧化（EO），因为通过OER消耗大量能量。但是，在这项研究中，这种阳极通过特定的模块化阳极体系结构参与了非常有效的EO工艺。NdFeB磁体将痕量的Fe3O4 / Sb-SnO2磁性颗粒作为辅助电极（AEs）吸附在二维（2D）Ti / IrO2-Ta2O5的表面上，从而构成了一个新的磁性组装电极（MAE）。可以通过回收其AE来更新MAE。MAE的电化学性质和EO性能可以通过调节AE的负载量来调节。结果表明，即使少量的AE也会增加表面粗糙度并提供大量有效的活性位点。当去除偶氮染料酸性红G的颜色时，最佳MAE的效率分别比2D Ti / IrO2-Ta2O5和2D Ti / Sb-SnO2高约1100％和约500％。MAE的优越性也适用于降解苯酚。因此，讨论了Ti / IrO2-Ta2O5与磁性Sb-SnO2颗粒之间的协同作用。
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