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采用热分解法在400℃下制备了稀土Nd改性Ti/RuO2-Co3O4氧化物阳极,对稀土Nd掺杂量进行优化。利用SEM、EDX及XRD等分析方法对电极表面形貌、组成及结构进行了表征,通过开路电压、循环伏安、极化曲线及强化电解寿命等电化学方法研究了电极的析氧催化活性及稳定性。结果表明:稀土Nd掺杂使表面层晶粒细化,晶型饱满,且促进活性组分RuO2向电极表面富集,增加电极催化活性中心;掺杂量为20:1时,电极析氧性能最佳,伏安电荷容量高达686mC/cm2,反应活化能低至16.76kJ/mol,掺入稀土Nd后电极基体与涂层的结合力增强,电极强化电解寿命高达158h。
The rare earth Nd modified Ti / RuO2-Co3O4 anodes were prepared by thermal decomposition at 400 ℃, and the amount of rare earth Nd doping was optimized. The surface morphology, composition and structure of the electrode were characterized by SEM, EDX and XRD. The oxygen evolution catalytic activity of the electrode was investigated by electrochemical methods such as open circuit voltage, cyclic voltammetry, polarization curve and enhanced electrolysis life. stability. The results show that the rare earth Nd doping makes the surface grain refinement and full crystal form, and promotes the enrichment of the active component RuO2 to the electrode surface and increases the catalytic activity center of the electrode. When the doping amount is 20: 1, the oxygen evolution performance The best voltammetry charge capacity of 686mC / cm2, the activation energy as low as 16.76kJ / mol, after incorporation of rare earth Nd electrode substrate and the coating adhesion enhanced electrode life of up to 158h.