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Electrochemical catalysis at an ultramicroelectrode modified with redox species

✍ Scribed by Guangli Che; Shaojun Dong

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 639 KB
Volume: 38
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(93)85016-r

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✦ Synopsis

Almtraetaeneral

equations of the electrocatalytic reaction at an ultramicroelectrode modified with redox species have been described according to the Andrieux-Saveant model. The electrocatalytic kinetic process has been discussed for the whole set of cases, ie (R), (R + S'), (SR), (SR + E), (E), (R + E), (ER), (S), (ER + S') and (S + E) limiting situations. The effect of y on the catalytic steady state current shows that the higher the value of y, the lower the catalytic current. The kinetic process shifts rapidly from R to E with increasing values of y. It is favorable for catalysis only when y is very low. Therefore, the redox species modified ultramicroelectrode with thin 6lm is utilized for electrocatalysis, and the larger the radius of ultramicroelectrode, the higher the catalytic efficiency.

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