超微盘电极多时域示差阶梯伏安法可逆波理论

The theory of Reversible Wave in Multi-time-domain Differential Staircase Voltammetry on Ultramicrodisk Electrodes

本文提出了超微盘电极上三种多时域示差阶梯伏安法,对可逆波的性质进行了研究,推导了多时域示差阶梯伏安法可逆波理论公式,结果为: △i=-4nFC_R~*Dr_o[B_o(f_(ko)-f_(Lo))-(sum from j=0 to k-1)(Bj-Bj_(+1))fk_a+(sum from j=0 to L-1)(Bj-Bj_(+1))f_(Lb)] 式中 f_(Ko)=f[(K-S_a+1)P],f_(Lo)=f[(L-S_b+1)P], f_(ka)=f[(K-S_a+j)P],f_(Lb)=f[(L-S_b-j)P]。 利用超微盘铂电极(r_o=10μm),亚铁氰化钾-KC1(0.5mol/L)体系及自制的微机多功能电分析仪进行实验验证,理论与实验结果相符合。

Three methods are presented for multi-time-dom(?)in differential staircase voltammetry at an inlaid ultramierodisk electrode. The theoretical equations for reversible ease are derived as follows; △i=-4nFC_R~* Dr_o [B_o(fx_o-fL_o)-sum from j=0 to K-1 (B_j-B_(j+1))fk_(?)+sum from j=0 to L-1 (B_j-B_(j+1))fLb] where fk_o=f[(k-S_(2+1)P], fL_o=f[(L-S_(b+1))P] fk_2=f[(k-S_a-j)p], fLb=f[(L-S_b-j)p]. The experimental investigation employs the oxidation of K_4[Fe(CN)_6] in the presence of KCl (0.5 mol/L) at a platinum ultramierodisk electrode with ractius of 10 μm, and a general purpose microcomputer-based apparatus used in this work was self-made. The experimental results Were found to agree with those of the theory.