论文部分内容阅读
对比Na BH4碱性溶液Cu、Ag、Ni、Pt和Au电极的循环伏安特性发现,BH-4在Au电极上活性最强,Pt有一定的活性,而Cu、Ag及Ni几乎没有活性。用三电极体系研究了BH-4在Au电极上的氧化机理,分析了碱性体系中不同浓度Na BH4溶液的线性循环伏安特性,讨论了扫描速度、OH-和B(OH)-4浓度等对BH-4氧化峰电位及峰电流的影响。结果表明,以Au电极为工作电极的峰值电流法是BH-4离子定性和定量检测的一种简单、快速、准确的方法。同时,溶液中较大浓度范围内变化的OH-和B(OH)-4对Na BH4的分析无明显影响。
Comparing the cyclic voltammetry of Cu, Ag, Ni, Pt and Au electrodes in NaBH4 solution, we found that BH-4 has the strongest activity on Au electrode, Pt has some activity, while Cu, Ag and Ni have almost no activity. The oxidation mechanism of BH-4 on Au electrode was studied by using a three-electrode system. The linear cyclic voltammetry (CV) of different concentrations of Na BH4 solution in alkaline solution was analyzed. The effects of scanning speed, OH- and B (OH) And other BH-4 oxidation peak potential and peak current. The results show that the peak current method using the Au electrode as the working electrode is a simple, rapid and accurate method for the qualitative and quantitative detection of BH-4 ions. At the same time, the changes of OH- and B (OH) -4 in the larger concentration range of the solution had no significant effect on the analysis of Na BH4.