Voltammetric sizing of inert particles

被引：27

作者：

Davies, TJ ^{[1
]}

Lowe, ER ^{[1
]}

Wilkins, SJ ^{[1
]}

Compton, RG ^{[1
]}

机构：

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

来源：

CHEMPHYSCHEM | 2005年 / 6卷 / 07期

关键词：

diffusion; domains; electrochemical analysis; electrochemistry; modified electrodes; voltammetry;

D O I：

10.1002/cphc.200500152

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 average size of inert particle is determined using a simple electrochemical procedure. Alumina particles are deposited on an edge-plane graphite electrode, and a cyclic voltammogram is recorded. The scan rate employe varies between 0.2 and 0.2 Vs(-1). At these scan rates the diffusion layer thickness is greater than the size of the alumina particles, minimizing the influence of the particles height on the observed voltammetry. The average size of the particles is determined via comparison of the experimental voltammograms with simulations.

引用

页码：1340 / 1347

页数：8

共 18 条

[1] CHARGE-TRANSFER AT PARTIALLY BLOCKED SURFACES - A MODEL FOR THE CASE OF MICROSCOPIC ACTIVE AND INACTIVE SITES [J].

AMATORE, C ;

SAVEANT, JM ;

TESSIER, D .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1983, 147 (1-2) :39-51

[2] Granulation, Phase Change, and Microstructure - Kinetics of Phase Change. III [J].

Avrami, M .

JOURNAL OF CHEMICAL PHYSICS, 1941, 9 (02) :177-184

[3]

AVRAMI M, 1939, J CHEM PHYS, V7, P1130

[4]

Avrami M., 1940, J CHEM PHYS, V8, P212, DOI [10.1063/1.1750631, DOI 10.1063/1.1750631]

[5] Electrocatalysis at graphite and carbon nanotube modified electrodes: edge-plane sites and tube ends are the reactive sites [J].

Banks, CE ;

Davies, TJ ;

Wildgoose, GG ;

Compton, RG .

CHEMICAL COMMUNICATIONS, 2005, (07) :829-841

[6] A NUMERICAL-METHOD FOR SOLVING PARTIAL-DIFFERENTIAL EQUATIONS ON HIGHLY IRREGULAR EVOLVING GRIDS [J].

BRAUN, J ;

SAMBRIDGE, M .

NATURE, 1995, 376 (6542) :655-660

[7] Computational and experimental study of the cyclic voltammetry response of partially blocked electrodes. Part 1. Nonoverlapping, uniformly distributed blocking systems [J].

Brookes, BA ;

Davies, TJ ;

Fisher, AC ;

Evans, RG ;

Wilkins, SJ ;

Yunus, K ;

Wadhawan, JD ;

Compton, RG .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (07) :1616-1627

[8] Stochastic problems in physics and astronomy [J].

Chandrasekhar, S .

REVIEWS OF MODERN PHYSICS, 1943, 15 (01) :0001-0089

[9] Numerical simulation of partially blocked electrodes under cyclic voltammetry conditions: influence of the block unit geometry on the global electrochemical properties [J].

Chevallier, FG ;

Davies, TJ ;

Klymenko, OV ;

Jiang, L ;

Jones, TGJ ;

Compton, RG .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2005, 577 (02) :211-221

[10]

CHEVALLIER FG, 2005, J ELECTROANAL CHEM

← 1 2 →