How does the double layer at a disk electrode charge?

被引：19

作者：

Myland, JC ^{[1
]}

Oldham, KB ^{[1
]}

机构：

[1] Trent Univ, Dept Chem, Electrochem Lab, Peterborough, ON K9J 7B8, Canada

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2005年 / 575卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

double layer; disk electrode; chronoamperometry; charging current; simulation; spheroidal coordinates; potential step;

D O I：

10.1016/j.jelechem.2004.09.004

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Because of the nonuniform accessibility of its surface to ion transport from the solution. the double layer at an inlaid disk electrode charges anomalously in response to a potential step. A numerical simulation of the problem shows that the overall current versus time transient differs little from that for a single resistor in series with a single capacitor. Nevertheless. the charging process, away from the disk's perimeter, differs surprisingly from what might be expected in that the current density initially increases with time. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：81 / 93

页数：13

共 23 条

[1] NEW CONCEPT FOR A POTENTIOSTAT FOR ONLINE OHMIC DROP COMPENSATION IN CYCLIC VOLTAMMETRY ABOVE 300 KV S-1 [J].

AMATORE, C ;

LEFROU, C .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1992, 324 (1-2) :33-58

[2] Ohmic drop compensation in cyclic voltammetry at scan rates in the megavolt per second range: access to nanometric diffusion layers via transient electrochemistry [J].

Amatore, C ;

Maisonhaute, E ;

Simonneau, G .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2000, 486 (02) :141-155

[3] SPACE VARIABLES WELL FITTED FOR THE STUDY OF STEADY-STATE AND NEAR-STEADY-STATE DIFFUSION AT A MICRODISK [J].

AMATORE, CA ;

FOSSET, B .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1992, 328 (1-2) :21-32

[4]

BOAS ML, 1983, MATH METHODS PHYS SC, P428

[5] PERFORMANCE OF A NUMERICAL-METHOD BASED ON THE HOPSCOTCH ALGORITHM AND ON AN OBLATE SPHEROIDAL SPACE COORDINATE-EXPANDING TIME GRID FOR SIMULATION OF VOLTAMMETRIC CURVES AT AN INLAID DISK MICROELECTRODE [J].

LAVAGNINI, I ;

PASTORE, P ;

MAGNO, F ;

AMATORE, CA .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 316 (1-2) :37-47

[6] MICRODISK ELECTRODES .1. DIGITAL-SIMULATION WITH A CONFORMAL-MAP [J].

MICHAEL, AC ;

WIGHTMAN, RM ;

AMATORE, CA .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1989, 267 (1-2) :33-45

[7]

Morse P. M., 1953, METHODS THEORETICAL, P1292

[8]

MYLAND JC, 2004, UNPUB J ELECTROANAL

[9] CURRENT DISTRIBUTION ON A ROTATING DISK BELOW LIMITING CURRENT [J].

NEWMAN, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1966, 113 (12) :1235-&

[10] RESISTANCE FOR FLOW OF CURRENT TO A DISK [J].

NEWMAN, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1966, 113 (05) :501-&

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