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研究了不同浓度的Hg~(2+)在碳纤维微电极表面电沉积Hg的形态,沉积机制和实验参数对汞膜性质及溶出电流的影响;剖析了Hg的成核过程,验证了成核理论;借扫描电镜观察了汞晶体图象.约在6×10~(-5)mol·L~(-1)Hg~(2+)时镀汞,可形成密布型微汞滴构成的类汞膜,微滴直径在0.03—0.2μm,汞微滴密度约为5.7×10~5个/cm~2.提出了优化汞膜的实验条件和依据.
The effects of different concentrations of Hg2 + electrodeposited Hg on the surface of carbon fiber microelectrode were studied. The influence of deposition mechanism and experimental parameters on the properties of mercury film and the dissolution current were investigated. The nucleation process of Hg was analyzed and the nucleation theory The mercury crystal image was observed by scanning electron microscopy, and the mercury-like mercury was formed when the mercury content was about 6 × 10 -5 mol·L -1 Hg 2+. The diameter of the droplets is 0.03-0.2μm, and the density of mercury droplet is about 5.7 × 10-5 / cm2.The experimental conditions and basis for optimizing the mercury film are proposed.