Dopamine oxidation at gold electrodes: mechanism and kinetics near neutral pH

被引：93

作者：

Bacil, Raphael P. ^{[1
,2
]}

Chen, Lifu ^{[1
]}

Serrano, Silvia H. P. ^{[2
]}

Compton, Richard G. ^{[1
]}

机构：

[1] Univ Oxford, Phys & Theoret Chem Lab, South Parks Rd, Oxford OX1 3QZ, England

[2] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP, Brazil

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2020年 / 22卷 / 02期

关键词：

ELECTROCHEMICAL OXIDATION; DIGITAL-SIMULATION; ASCORBIC-ACID; CATECHOLS; 2-ELECTRON; ALGORITHM; CHEMISTRY; PATHWAYS; INSIGHTS;

D O I：

10.1039/c9cp05527d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The two-electron electrochemical oxidation of dopamine is studied voltammetrically at gold macroelectrodes around neutral pH with simulations used to give kinetic and mechanistic data. In particular, the system shows "potential inversion" in which the thermodynamic oxidation potential of dopamine to form the corresponding semi-quinone formation occurs at a more positive potential than that of the oxidation of the semi-quinone to the quinone form. The use of Tafel slopes measured from the voltammograms as a function of the voltage scan rate is show to be a particularly sensitive indicator of mechanism showing the effect of the follow-up chemistry in which the two-electron oxidation product undergoes an irreversible cyclization reaction.

引用

页码：607 / 614

页数：8

共 41 条

[1] Kinetic study of the oxidation of some catecholamines by digital simulation of cyclic voltammograms [J].

Afkhami, A ;

Nematollahi, D ;

Khalafi, L ;

Rafiee, M .

INTERNATIONAL JOURNAL OF CHEMICAL KINETICS, 2005, 37 (01) :17-24

[2] ELECTROCHEMICAL STUDY OF OXIDATION OF 3,4-DIHYDROXYPHENYLALANINE - OXIDATION MECHANISM OF CATECHOLS IN ACID-MEDIUM [J].

BRUN, A ;

ROSSET, R .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1974, 49 (02) :287-300

[3] Impact electrochemistry reveals that graphene nanoplatelets catalyse the oxidation of dopamine via adsorption [J].

Chen, Lifu ;

Tanner, Eden E. L. ;

Lin, Chuhong ;

Compton, Richard G. .

CHEMICAL SCIENCE, 2018, 9 (01) :152-159

[4] Analysis of catechol, 4-methylcatechol and dopamine electrochemical reactions on different substrate materials and pH conditions [J].

Chumillas, Sara ;

Palomaki, Tommi ;

Zhang, Meng ;

Laurila, Tomi ;

Climent, Victor ;

Feliu, Juan M. .

ELECTROCHIMICA ACTA, 2018, 292 :309-321

[5] DISPROPORTIONATION DURING ELECTROOXIDATION OF CATECHOLAMINES AT CARBON-FIBER MICROELECTRODES [J].

CIOLKOWSKI, EL ;

MANESS, KM ;

CAHILL, PS ;

WIGHTMAN, RM ;

EVANS, DH ;

FOSSET, B ;

AMATORE, C .

ANALYTICAL CHEMISTRY, 1994, 66 (21) :3611-3617

[6]

Compton RG, 2018, UNDERSTANDING VOLTAMMETRY, 3RD EDITION, P1

[7] On the electrochemistry of dopamine in aqueous solution. Part I: The role of [SDS] on the voltammetric behavior of dopamine on a carbon paste electrode [J].

Corona-Avendano, Silvia ;

Alarcon-Angeles, Georgina ;

Ramirez-Silva, Maria Teresa ;

Rosquete-Pina, Giselle ;

Romero-Romo, Mario ;

Palomar-Pardave, Manuel .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2007, 609 (01) :17-26

[8] Simultaneous voltammetric detection of ascorbic acid, dopamine and uric acid using a pyrolytic graphite electrode modified into dopamine solution [J].

da Silva, Robson P. ;

Lima, Antonio William O. ;

Serrano, Silvia H. P. .

ANALYTICA CHIMICA ACTA, 2008, 612 (01) :89-98

[9] HETEROGENEOUS MECHANISMS OF THE OXIDATION OF CATECHOLS AND ASCORBIC-ACID AT CARBON ELECTRODES [J].

DEAKIN, MR ;

KOVACH, PM ;

STUTTS, KJ ;

WIGHTMAN, RM .

ANALYTICAL CHEMISTRY, 1986, 58 (07) :1474-1480

[10] THE KINETICS OF SOME SUBSTITUTED CATECHOL/ORTHO-QUINONE COUPLES AT A CARBON PASTE ELECTRODE [J].

DEAKIN, MR ;

WIGHTMAN, RM .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1986, 206 (1-2) :167-177

← 1 2 3 4 5 →