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为了考察离子液体对钛基Pb O2电极电化学性能的影响,将离子液体1-乙基-3-甲基-咪唑四氟硼酸盐([Emim]BF4)添加到Pb(NO3)2混合电积溶液中,通过阳极电氧化沉积制备得到钛基β-Pb O2形稳阳极Ti/β-Pb O2,对其电催化氧化活性及稳定性进行了考察,并与采用F-和十二烷基磺酸钠(SDS)为电积溶液添加剂制备的带有中间层的电极Ti/Sn O2-Sb2O3/β-Pb O2进行了对比。结果表明,离子液体修饰电极材料的电催化活性和稳定性相比后者均有明显提高。对电极表面的SEM与XRD表征分析表明,添加离子液体制备得到的电极Ti/β-Pb O2活性层表面致密平整、结晶大小均匀、择优结晶取向发生明显变化。电化学循环伏安实验结果显示,电极Ti/β-Pb O2的析氧过电位(1.7 V)比Ti/Sn O2-Sb2O3/β-Pb O2(1.6 V)稍高。
In order to investigate the effect of ionic liquid on the electrochemical performance of Pb-based PbO2 electrode, ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate ([Emim] BF4) In the solution, the titanium-based β-Pb O2 stable anode Ti / β-Pb O2 was prepared by anodic electro-oxidation deposition. The electrocatalytic oxidation activity and stability were investigated. Sodium sulfonate (SDS) was compared with Ti / Sn O2-Sb2O3 / β-Pb O2 with an intermediate layer prepared by electrowinning solution additive. The results showed that the electrocatalytic activity and stability of ionic liquid modified electrode materials were significantly improved compared with the latter. Electrode surface SEM and XRD characterization analysis showed that the electrode prepared by adding ionic liquid Ti / β-PbO2 active layer surface dense and smooth, uniform crystal size, the preferential crystallographic orientation changed significantly. The electrochemical cyclic voltammetry results show that the oxygen evolution potential (1.7 V) of the Ti / β-Pb O2 electrode is slightly higher than that of Ti / Sn O2-Sb2O3 / β-Pb O2 (1.6 V).