DIRECT DETERMINATION OF DIFFUSION-COEFFICIENTS BY CHRONOAMPEROMETRY AT MICRODISK ELECTRODES

被引：266

作者：

DENUAULT, G ^{[1
]}

MIRKIN, MV ^{[1
]}

BARD, AJ ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT CHEM,AUSTIN,TX 78712

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1991年 / 308卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0022-0728(91)85056-U

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The chronoamperometric response at a microdisk is used for the direct determination of the diffusion coefficient of an electroactive species. The method does not require knowledge of the bulk concentration and the number of electrons participating in the electrode reaction, and requires only a value for the disk radius. Subsequent determination of the number of electrons (n) for an electrode reaction or the concentration of electroactive species is also possible. This approach is demonstrated with the evaluation of the diffusion coefficient of Fe(CN)6(4-) in KCl and that of borohydride ion in NaOH. In both cases, the values of n found remained constant over a wide time range and correspond to those expected for these processes.

引用

页码：27 / 38

页数：12

共 21 条

[1] Adams R. N., 1969, ELECTROCHEMISTRY SOL
[2] ELECTROCHEMICAL STUDY OF KINETICS OF A CHEMICAL REACTION COUPLED BETWEEN 2 CHARGE TRANSFER REACTIONS - POTENTIOSTATIC REDUCTION OF P-NITROSOPHENOL
ALBERTS, GS
SHAIN, I
[J]. ANALYTICAL CHEMISTRY, 1963, 35 (12) : 1859 - &
[3] ALBERY WJ, 1971, RING DISC ELECTRODES, P105
[4] ABSOLUTE DETERMINATION OF ELECTRON CONSUMPTION IN TRANSIENT OR STEADY-STATE ELECTROCHEMICAL TECHNIQUES
AMATORE, C
AZZABI, M
CALAS, P
JUTAND, A
LEFROU, C
ROLLIN, Y
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1990, 288 (1-2) : 45 - 63
[5] DIFFUSION-CONTROLLED CURRENT AT THE STATIONARY FINITE DISK ELECTRODE - THEORY
AOKI, K
OSTERYOUNG, J
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1981, 122 (MAY): : 19 - 35
[6] USE OF MICROELECTRODES FOR THE RAPID-DETERMINATION OF THE NUMBER OF ELECTRONS INVOLVED IN AN ELECTRODE-REACTION
BARANSKI, AS
FAWCETT, WR
GILBERT, CM
[J]. ANALYTICAL CHEMISTRY, 1985, 57 (01) : 166 - 170
[7] Bard A. J., 2001, ELECTROCHEMICAL METH, V2nd, P50
[8] BARD AJ, IN PRESS ANAL CHEM
[9] Biondi C., 1970, J ELECTROANAL CHEM, V24, P263
[10] POLAROGRAPHY FO TETRAHYDROBORATE ION . EFFECT OF HYDROLYSIS ON SYSTEM
GARDINER, JA
COLLAT, JW
[J]. INORGANIC CHEMISTRY, 1965, 4 (08) : 1208 - &

← 1 2 3 →