Electrochemical Behavior of a Glassy Carbon Electrode Chemically Modified with Nickel Pentacyanonitrosylferrate in Presence of Sulfur Compounds

被引：4
|
作者：
Paim, Leonardo L. [1 ]
Hammer, Peter [2 ]
Stradiotto, Nelson R. [1 ]
机构：
[1] UNESP, Inst Quim, Dept Quim Analt, BR-14801970 Araraquara, SP, Brazil
[2] UNESP, Inst Quim, Dept Fis Quim, BR-14801970 Araraquara, SP, Brazil
来源：
ELECTROANALYSIS | 2011年 / 23卷 / 06期
基金：
巴西圣保罗研究基金会;
关键词：
Mercaptan; Sulfide; Nickel pentacyanonitrosylferrate; Cyclic voltammetry; Square wave voltammetry; MODIFIED ALUMINUM ELECTRODE; FILM-MODIFIED ELECTRODES; ELECTROCATALYTIC OXIDATION; COBALT PENTACYANONITROSYLFERRATE; AMPEROMETRIC DETERMINATION; HEXACYANOFERRATE FILM; NATURAL-GAS; COMPOSITE ELECTRODE; ASCORBIC-ACID; SULFIDE;
D O I：
10.1002/elan.201000723
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The glassy carbon electrode was modified with a nickel pentacyanonitrosylferrate film by electrodeposition of Ni and subsequent derivatization with NaPCNF. The film was characterized by XPS and electrochemical methods. Cyclic voltammetry of the NiPCNF onto the GC shows a redox couple (Fe(III)/Fe(II)) with E(ol) of 538 mV (I(pa)/I(pc) around 1) and Delta E(p) of 93 mV in 0.5 mol L(-1) KNO(3), with a diffusion-controlled process. There was a decrease of anodic peak currents of the film in the presence of sulfide and 2-propanethiol due to a precipitation reaction on the film surface by nucleophilic attack.
引用
收藏
页码：1488 / 1496
页数：9
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