KINETIC-ANALYSIS OF ELECTRON-TRANSFER FROM A GRAPHITE COATING TO HORSERADISH-PEROXIDASE

Authors
TATSUMA T ARIYAMA K OYAMA N
Citation
T. Tatsuma et al., KINETIC-ANALYSIS OF ELECTRON-TRANSFER FROM A GRAPHITE COATING TO HORSERADISH-PEROXIDASE, Journal of electroanalytical chemistry [1992], 446(1-2), 1998, pp. 205-209
Citations number
18
Categorie Soggetti
Electrochemistry,"Chemistry Analytical
Journal title
Journal of electroanalytical chemistry [1992]
ISSN journal
15726657 → ACNP
Volume
446
Issue
1-2
Year of publication
1998
Pages
205 - 209
Database
ISI
SICI code
Abstract
The kinetics of the direct electron transfer from a graphite coating a s an electrode to compounds I and II of adsorbed horseradish peroxidas e (HRP) is analyzed. The surface density of HRP on the graphite coatin g measured by using a quartz crystal microbalance is 1.4 x 10(-11) mol cm(-2). The apparent heterogeneous electron transfer rate constant is 2 x 10(-4) s(-1) at pH 6.4, which is three orders of magnitude smalle r than that for HRP adsorbed on a normal graphite electrode. (C) 1998 Elsevier Science S.A. All rights reserved.