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采用电沉积法制备了稀土金属Nd改性Pb O_2电极(Nd-Pb O_2),并通过扫描电镜(SEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)、荧光光谱(FP)、线性极化扫描(LSV)、强化寿命测试(ALT)、循环伏安扫描(CV)等方法表征了其表面结构和电化学性能,探讨了对酸性橙II(AOII)的电催化氧化性能。SEM、XRD、XPS测试结果表明,Nd以Nd~(3+)形式掺杂进入电极镀层,同时对表面形貌、元素组成均有不同程度的改变,但不改变镀层表面的β-Pb O_2晶型;电化学性能测试表明,Nd掺杂可有效提高电极的析氧电位和稳定性;CV测试及AOII降解实验结果表明,Nd-Pb O_2电极对AOII还表现出直接氧化作用,电催化氧化AOII能力更强;FP分析表明,Nd-Pb O_2具有较强的催生羟基自由基能力,可增强电极降解有机物的催化活性。
The Nd-Pb O 2 electrode (Nd-Pb O 2) was prepared by electrodeposition and characterized by SEM, XRD, XPS, , Linear polarization scanning (LSV), enhanced life test (ALT) and cyclic voltammetry (CV) were used to characterize their surface structures and electrochemical properties. The electrocatalytic oxidation of acidic orange II (AOII) was also investigated. The results of SEM, XRD and XPS indicated that Nd doping into the electrodeposited layer with Nd ~ (3 +) addition changed the surface morphology and elemental composition to some extent, but did not change the β-Pb O_2 crystal The results of electrochemical tests show that Nd doping can effectively improve the oxygen evolution potential and stability of the electrode. The CV test and the AOII degradation experiment show that the Nd-Pb O 2 electrode exhibits direct oxidation to AOII and electrocatalytic oxidation of AOII The results showed that Nd-Pb 2 O 2 had strong ability to generate hydroxyl radical and enhanced the catalytic activity of the electrode for degrading organic compounds.