MULTISTEP MECHANISM IN THE ELECTROCHEMICAL OXIDATION-REDUCTION OF FE-CITRATE COMPLEXES

被引：11

作者：

BATTISTINI, L ^{[1
]}

LOPEZPALACIOS, J ^{[1
]}

机构：

[1] COLEGIO UNIV BURGOS,DEPT ANALYT CHEM,E-09080 BURGOS,SPAIN

来源：

ANALYTICAL CHEMISTRY | 1994年 / 66卷 / 13期

关键词：

D O I：

10.1021/ac00085a014

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A study was made of the electrochemical behavior of the Fe-citrate system in aqueous medium using cyclic voltammetry. Potential sweeps between 200 and -650 mV vs Ag/AgCl show the existence of two Fe(III)/Fe(II) redox systems. The first, with a half-wave potential close to 0 V, proves to be a reversible system, while the second, with a half-wave potential around -0.4 V, shows the characteristics of an E(r)C(i) process. Competitive reactions between hydroxy and citrate complexes of Fe(lII) are considered. Both equilibrium measurements and kinetic evolution of the system are used in order to propose a scheme for the set of chemical and electrode rections studied. The different behavior observed in solutions of Fe(III) or Fe(II) is suggested as a method for the easy electrochemical differentiation of the oxidation state of Fe in solution.

引用

页码：2005 / 2009

页数：5

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