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Inverse opal-like marcoporous RuO 2 electrodes for enhancing the mass transfer in electro-oxidation of tricyclazole
Journal of Porous Materials ( IF 2.6 ) Pub Date : 2020-06-12 , DOI: 10.1007/s10934-020-00914-z
Ruiqian Liu , Siqi Liu , Qianrui Liu , Yonghao Zhang , Jiansheng Li , Weiqing Han , Xiuyun Sun , Jinyou Shen

In order to improve the mass transfer of anodic oxidation, an inverse opal-like marcoporous RuO2 electrode (IOMP-RuO2) was designed to enhance the concentration diffusion and molecule-to-electrode collision. Characterization methods including SEM, XRD, BET, LSV, CV, EIS and CA were performed to evaluate the properties of the IOMP-RuO2. In addition, the electro-oxidation capacity of the RuO2 electrode prepared at varying calcination temperature was also investigated. Results show that calcination temperature can affect the electro-oxidation performance of IOMP-RuO2 from the specific surface area, crystallinity of RuO2, voltammetric charge and impedance. Thereinto, crystallinity of RuO2 and impedance played decisive roles in the electrochemical oxidation. The fine crystallinity and lower impedance of IOMP-RuO2 acquired by 450 °C increased the electronic transport rate and allowed less redox couple to be involved in oxygen evolution, contributing to the best oxidation performance amongst others. Under this calcination temperature, the IOMP-RuO2 possesses larger electro-active areas, smaller electric resistance and enhanced mass transfer as compared to the planar RuO2 electrode. Furthermore, the IOMP-RuO2 gave a 42.7% higher degradation rate than that observed for the planar RuO2 electrode in the abatement of tricyclazole (TC) after 180 min. The high rate constant (2.14 × 10–2 min−1) and current efficiency (61.1%) achieved by IOMP-RuO2 contributed to a low energy consumption of 0.04744 kWh mg−1. Thus, these findings promoted the IOMP-RuO2 as an alternative electrode for wastewater decontamination.



中文翻译:

反蛋白石状马孔状RuO 2电极,用于增强三环唑电氧化中的质量转移

为了改善阳极氧化的质量传递,设计了一种反蛋白石状的多孔RuO 2电极(IOMP-RuO 2),以增强浓度扩散和分子与电极的碰撞。进行了包括SEM,XRD,BET,LSV,CV,EIS和CA在内的表征方法,以评估IOMP-RuO 2的性能。另外,还研究了在不同的煅烧温度下制备的RuO 2电极的电氧化能力。结果表明,煅烧温度可从比表面积,RuO 2的结晶度等方面影响IOMP-RuO 2的电氧化性能。,伏安电荷和阻抗。其中,RuO 2的结晶度和阻抗在电化学氧化中起决定性作用。通过450°C获得的IOMP-RuO 2的优良结晶度和更低的阻抗提高了电子传输速率,并使得较少的氧化还原对参与氧的释放,从而使氧化性能达到最佳。在该煅烧温度下,与平面RuO 2电极相比,IOMP-RuO 2具有较大的电活性面积,较小的电阻和增强的质量传递。此外,IOMP-RuO 2的降解率比平面RuO 2的降解率高42.7%电极在180分钟后消除三环唑(TC)。IOMP-RuO 2获得的高速率常数(2.14×10 –2  min -1)和电流效率(61.1%)有助于降低0.04744 kWh mg -1的能耗。因此,这些发现促进了IOMP-RuO 2作为废水净化的替代电极。

更新日期:2020-06-12
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