Journal of Catalysis ( IF 6.5 ) Pub Date : 2019-05-07 , DOI: 10.1016/j.jcat.2019.04.025 Jae-Chan Kim , Seung-Ik Oh , Woohyeon Kang , Ha-Young Yoo , Jaesang Lee , Dong-Wan Kim
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Dimensionally stable RuO2 (RO)- and IrO2-based anodes have been widely used for electrochemical water treatment but alternative materials are required due to their well-recognized drawbacks such as high-cost and low oxygen evolution potential. In an effort to minimize noble metal contents, we herein fabricated electrospun Sb-doped SnO2 (ATO)/RO composite nanofibers as new anode materials by controlling precursor ratios. These composite nanofiber anodes have one-dimensional nanostructure assembled with highly uniform ATO and RO nanoparticles and their oxygen evolution potential was successfully tailored by compositional change. The ATO/RO nanofiber anodes, even with a small amount of RO of 3% exhibited superior electrocatalytic performance in oxidative organic degradation; complete degradation of bisphenol A as a model substrate was achieved during 20 min-electrolysis on ATO/RO anodes at a low current density of 3 mA⋅cm−2. This strategy provides the optimization of oxygen evolution reaction and current efficiency, resulting in excellent capability for electrochemical water treatment.
中文翻译:
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定制的Sb掺杂SnO 2 / RuO 2复合纳米纤维中的优异阳极氧化,用于电化学水处理
尺寸稳定的基于RuO 2(RO)和IrO 2的阳极已被广泛用于电化学水处理,但由于其公认的缺点(例如高成本和低氧气释放潜力),因此需要替代材料。为了使贵金属含量最小化,我们在本文中制造了电纺掺Sb的SnO 2。(ATO)/ RO复合纳米纤维作为新的阳极材料,可通过控制前体比率来实现。这些复合纳米纤维阳极具有一维纳米结构,由高度均匀的ATO和RO纳米颗粒组装而成,并且通过成分变化成功地调节了它们的析氧潜能。即使少量的RO为3%,ATO / RO纳米纤维阳极在氧化有机降解方面也表现出优异的电催化性能。在3 mA·cm -2的低电流密度下,在ATO / RO阳极上电解20分钟时,双酚A完全降解为模型底物。该策略可优化氧气释放反应和电流效率,从而具有出色的电化学水处理能力。