Effect of indium doping on the PbO2 electrode for the enhanced electrochemical oxidation of aspirin: An electrode comparative study
Effect of indium doping on the PbO2 electrode for the enhanced electrochemical oxidation of aspirin: An electrode comparative study
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DOI：
10.1016/j.seppur.2019.116321
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发表时间：
2020-04
影响因子：
8.6
通讯作者：
Yijing Xia;Xinze Bian;Yijing Xia;Wan Zhou;Lin Wang;Siqi Fan;Pan Xiong;Tingting Zhan;
中科院分区：
文献类型：
--
作者：
Yijing Xia;Xinze Bian;Yijing Xia;Wan Zhou;Lin Wang;Siqi Fan;Pan Xiong;Tingting Zhan;
采用电沉积技术制备了一种新型铟（In）掺杂PbO2电极，该电极具有高电化学活性和电化学降解难降解有机污染物的稳定性。根据阿司匹林去除效率，电沉积液中In/Pb的最佳摩尔比为1%。与未掺杂PbO2电极相比，所构建的In掺杂PbO2电极具有更致密的结构、更小尺寸的更好取向的晶体、更高的活性氧浓度、更高的析氧电位、更低的电荷转移电阻和更高的电极稳定性。 In掺杂PbO2电极被证明具有优异的电化学氧化能力和更高的自由基dotOH生成能力。对于In掺杂PbO2电极，电解2.5h后阿司匹林和COD的去除率分别达到76.45%和52.09%。同时，掺杂In后节能可达30.56%。这一结果与 PbO2 电极表面表征的结果非常吻合。最后，结合安全性评价，我们得出结论：In掺杂PbO2电极是一种有前景的有机污染物处理阳极。
A novel indium (In) doped PbO2electrode featuring high electrochemical activity and electrode stability toward electrochemical degradation of refractory organic pollutants was prepared by electrodeposition technique. Based on the aspirin removal efficiency, the optimized molar ratio of In/Pb in electrodeposition solution was 1%. In contract with the undoped PbO2electrode, the constructed In-doped PbO2electrode displayed a more compact structure, a better oriented crystal of smaller size, an increased concentration of active oxygen species, a higher oxygen evolution potential, a lower charge transfer resistance and a higher electrode stability. The In-doped PbO2electrode was demonstrated to have a superior electrochemical oxidation ability with higherradical dotOH generation capacity. For In-doped PbO2electrode, the removals of aspirin and COD reached 76.45% and 52.09% after 2.5 h of electrolysis, respectively. Meanwhile, the energy saving could be up to 30.56% after In doping. This outcome was in good agreement with the results of surface characterization of PbO2electrodes. Finally, combination with the safety evaluation, we could conclude that In-doped PbO2electrode was a promising anode for the treatment of organic pollutants.