二甲基亚砜中Tm^(3+)的电化学行为

Study on the Electrochemical Behaviors of Tm^(3+) in DMSO

研究了二甲基亚砜中Tm^(3+)在Pt电极上的电化学行为,结果表明,Tm^(3+)在Pt电极上的还原属于受扩散控制的准可逆过程.温度为293 K时,在0.01 mol/L Tm(NO)_3)_3—0.1 mol/L LiClO_4—DMSO体系中利用循环伏安法、计时电流法、计时电量法测得Tm^(3+)的扩散系数D0分别为1.15×10^(-6),1.09×10^(-6),2.61×10^(-6 )cm^2/s,并通过塔菲尔曲线求出交换电流密度j0=9.46×10^(-8)A/cm^2.

The electrochemical behaviors of Tm^3＋on Pt electrode belongs to a quasi-reversible diffusion-controlled process.In 0.01mol/L Tm（NO_3）_3—0.1mol/L LiClO_4—DMSO,the diffusion coefficients of Tm^3＋are 1.15×10^-6,1.09×10^-6,2.61×10^-6 cm^2/s by cyclicvoltammetry and chronoamperometry and chronocoulometric methods at 293 K.The exchange current density was9.46×10^（-8） A/cm^2 by tafel.