APPROXIMATE METHOD FOR SOLUTION OF FICK LAW PROBLEMS

被引：13

作者：

WEBER, SG

PURDY, WC

机构：

[1] Department of Chemistry, McGill University, Montreal, Que. H3A 2K6, 801 Sherbrooke St., W

来源：

ANALYTICA CHIMICA ACTA | 1978年 / 99卷 / 01期

关键词：

D O I：

10.1016/S0003-2670(01)84499-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The simplifying approximation that the concentration of an electroactive species is a linear function of distance into the solution from the electrode surface is used to derive current-time relationships for controlled potential electrolysis. Relationships for thinlayer chronoamperometry, chronoamperometry with a preceding homogeneous reversible reaction and linear-sweep voltammetry are compared with existing relationships to determine the range of applicability of the approximation. The approximation is found to yield qualitatively correct results. To obtain quantitatively or near-quantitatively correct results, it is necessary to incorporate more information about the electrochemical system into the derivation than simply the usual initial and boundary conditions. © 1978.

引用

页码：77 / 88

页数：12

共 6 条

[1] THEORY OF STATIONARY ELECTRODE POLAROGRAPHY - SINGLE SCAN + CYCLIC METHODS APPLIED TO REVERSIBLE IRREVERSIBLE + KINETIC SYSTEMS [J].