Electrocatalytic activity of arylthio tetra-substituted oxotitanium(IV) phthalocyanines towards the oxidation of nitrite

被引：47

作者：

Tau, Prudence ^{[1
]}

Nyokong, Tebello ^{[1
]}

机构：

[1] Rhodes Univ, Dept Chem, ZA-6140 Grahamstown, South Africa

来源：

ELECTROCHIMICA ACTA | 2007年 / 52卷 / 13期

基金：

新加坡国家研究基金会;

关键词：

titanium phthalocyanines; arylthio; electropolymerization; nitrite oxidation; kinetics; AMPEROMETRIC DETERMINATION; VOLTAMMETRIC BEHAVIOR; ANODIC-OXIDATION; NITRATE; ION; ELECTRODES; COMPLEXES; PLATINUM; SENSOR;

D O I：

10.1016/j.electacta.2006.12.059

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

This paper investigates the catalytic activities of arylthio substituted oxotitanium phthalocyanine (OTiPc) complexes that are immobilized on the glassy carbon electrode by electropolymerization, towards the oxidation of nitrite. The complexes are peripherally and non-peripherally substituted with phenylthio and benzylthio groups, namely la, 1b, 2a and 2b. All the modified electrodes exhibited improved electrocatalytic oxidation of nitrite than the unmodified electrodes by a two-electron mechanism producing nitrate ions. Catalytic currents are enhanced and nitrite overpotential reduced to similar to 0.60 V. Kinetic parameters are determined for all complexes and a mechanism is proposed. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：4547 / 4553

页数：7

共 45 条

[1] Electrochemical properties of benzylmercapto and dodecylmercapto tetra substituted nickel phthalocyanine complexes: Electrocatalytic oxidation of nitrite [J].

Agboola, Bolade O. ;

Ozoemena, Kenneth I. ;

Nyokong, Tebello .

ELECTROCHIMICA ACTA, 2006, 51 (28) :6470-6478

[2] Indirect determination of nitric oxide production by reduction of nitrate with a freeze-thawing-resistant nitrate reductase from Escherichia coli MC1061 [J].

Arias-Negrete, S ;

Jiménez-Romero, LA ;

Solíis-Martíinez, MO ;

Ramíirez-Emiliano, J ;

Avila, EE ;

Cuéllar-Mata, P .

ANALYTICAL BIOCHEMISTRY, 2004, 328 (01) :14-21

[3]

Bard A.J., 1980, ELECTROCHEMICAL METH

[4] DETECTION OF NITRITE USING ELECTRODES MODIFIED WITH AN ELECTRODEPOSITED RUTHENIUM-CONTAINING POLYMER [J].

BARISCI, JN ;

WALLACE, GG .

ANALYTICAL LETTERS, 1991, 24 (11) :2059-2073

[5] Experimental and theoretical study of the activity of substituted metallophthalocyanines for nitrite electro-oxidation [J].

Caro, CA ;

Bedioui, F ;

Páez, MA ;

Cárdenas-Jiron, GI ;

Zagal, JH .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (01) :E32-E39

[6] Electrocatalytic oxidation of nitrite on a vitreous carbon electrode modified with cobalt phthalocyanine [J].

Caro, CA ;

Bedioui, F ;

Zagal, JH .

ELECTROCHIMICA ACTA, 2002, 47 (09) :1489-1494

[7] Voltammetric behaviour and ion chromatographic detection of nitrite at a dispersed platinum glassy carbon electrode [J].

Casella, IG ;

Salvi, AM .

ELECTROANALYSIS, 1997, 9 (08) :596-601

[8] OXIDATIVE FLOW-INJECTION AMPEROMETRIC DETERMINATION OF NITRITE AT AN ELECTROCHEMICALLY PRE-TREATED GLASSY-CARBON ELECTRODE [J].

CHAMSI, AY ;

FOGG, AG .

ANALYST, 1988, 113 (11) :1723-1727

[9] Metallophthalocyanine catalysed electroreduction of nitrate and nitrite ions in alkaline media [J].

Chebotareva, N ;

Nyokong, T .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 1997, 27 (08) :975-981

[10] Characterization and electrocatalytic properties of cobalt hexacyanoferrate films [J].

Chen, SM .

ELECTROCHIMICA ACTA, 1998, 43 (21-22) :3359-3369

← 1 2 3 4 5 →