TY - JOUR
T1 - Diffusion current at microdisk electrodes-application to accurate measurement of diffusion coefficients
AU - Kakihana, Masato
AU - Ikeuchi, Haruko
AU - Satô, Gen P.
AU - Tokuda, Koichi
N1 - Funding Information:
The authors' thanks are due to Dr. Y0shio Shi,asuna of the Department of Mechanical Engineering of Sophia University and to Dr. Joseph Yamada of the National Chemical Laboratory for Industry for their helpful advice about the construction of the electrodes. They thank Dr. F.S. Howell of the Department of Chemistry of Sophia University for correcting the manuscript. They also thank Mr. Masahiro Suzuki of the Department of Chemistry of Sophia University for his assistance in a part of the computation, This work was partially supported by a Grant-in-Aid for Scientific Research No. 547045 from the Ministry of Education, Science and Culture.
PY - 1981/1/25
Y1 - 1981/1/25
N2 - Stationary electrodes (platinum and glassy carbon) were used for accurate measurement of diffusion coefficients. The theoretical diffusion current-time profile was calculated by digital simulation, by means of which the diffusion coefficient and the product of the charge number of electrode reaction n and the reactant concentration co were determined simultaneously from a single chronoamperogram. The feasibility of the method was demonstrated by measuring the diffusion coefficients of Tl(I) ions. When the nco value agreed with the corresponding known value, the diffusion coefficients were in good agreement with the standard values determined by the thin-walled hanging mercury drop electrode method. The diffusion coefficient of hexacyanoferrate(III) ions in 1 mol dm-3 KCl at, 25°C was also determined.
AB - Stationary electrodes (platinum and glassy carbon) were used for accurate measurement of diffusion coefficients. The theoretical diffusion current-time profile was calculated by digital simulation, by means of which the diffusion coefficient and the product of the charge number of electrode reaction n and the reactant concentration co were determined simultaneously from a single chronoamperogram. The feasibility of the method was demonstrated by measuring the diffusion coefficients of Tl(I) ions. When the nco value agreed with the corresponding known value, the diffusion coefficients were in good agreement with the standard values determined by the thin-walled hanging mercury drop electrode method. The diffusion coefficient of hexacyanoferrate(III) ions in 1 mol dm-3 KCl at, 25°C was also determined.
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U2 - 10.1016/S0022-0728(81)80082-4
DO - 10.1016/S0022-0728(81)80082-4
M3 - Article
AN - SCOPUS:0347826195
SN - 1572-6657
VL - 117
SP - 201
EP - 211
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 2
ER -