A kinetic study of the formation of 12-molybdosilicate and 12-molybdogermanate in aqueous solutions by ion transfer voltammetry with the nitrobenzene-water interface
A kinetic study of the formation of 12-molybdosilicate and 12-molybdogermanate in aqueous solutions by ion transfer voltammetry with the nitrobenzene-water interface
复制标题
硝基苯-水界面离子转移伏安法研究水溶液中12-钼硅酸盐和12-钼锗酸盐的形成动力学
DOI：
10.1016/0013-4686(95)00225-4
复制
发表时间：
1995
影响因子：
6.6
通讯作者：
A. Saito
中科院分区：
文献类型：
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作者：
H. Katano;T. Osakai;S. Himeno;A. Saito
发展了一种新的电化学方法来研究杂多阴离子的形成动力学。该方法（双脉冲电流分析法，DPA）基于对硝基苯-水界面上聚阴离子转移产生的电流的检测。在这项研究中，DPA被应用于两个Keggin阴离子，即，[SiMo 12 O 40]4-和[GeMo 12 O 40]4-。在动力学研究之前，进行循环伏安测量，以确认Keggin阴离子和其缺位阴离子（[H3 SiMo 11 O39]5-或[H3 GeMo 11 O39]5-）在一定条件下平衡共存。在DPA中，交替地向界面施加不同幅度的双电压脉冲，以跟踪Keggin阴离子和缺位阴离子的浓度。聚阴离子的浓度-时间曲线符合两步连续反应机理。然后发现缺环阴离子是Keggin阴离子的中间体。
A novel electrochemical approach was developed for the kinetic study of the formation of heteropolyanions. The method (dual pulse amperometry, DPA) is based on the detections of currents due to the transfers of polyanions at the nitrobenzene-water interface. In this study, DPA was applied to the kinetic study of the formation of two Keggin anions, viz., [SiMo12O40]4−and [GeMo12O40]4−. Prior to the kinetic study, cyclic voltammetric measurements were performed to confirm that the Keggin anion and its lacunary anion ([H3SiMo11O39]5−or [H3GeMO11O39]5−) coexist at equilibrium under certain conditions. In DPA, double voltage pulses of different amplitudes were alternately applied to the interface to follow the concentrations of both the Keggin and the lacunary anions. The concentration-time profiles for the polyanions could be elucidated by the two-step consecutive reactions mechanism. The lacunary anion was then found to be the intermediate of the Keggin anion.
T.Osakai：“1,2-二氯乙烷-水界面上杂多阴离子和同多阴离子的标准离子转移电位与其表面电荷密度的线性相关性”J.Electroanal.Chem.360。
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