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Dynamics of the dissolution of an underpotentially deposited Cu layer on Au(111): a combined time-resolved surface-enhanced infrared and chronoamperometric study

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Dynamics of the dissolution of an underpotentially deposited Cu layer on Au(111) a combined time-resolved sur.htm (413bytes)
Date
2000-06-26
Author
Ataka, K
Nishina, G
Cai, WB
Sun, SG
孙世刚
Osawa, M
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  • 化学化工-已发表论文 [14469]
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Abstract
It is well known that an ordered phase consisting of 2/3 monolayer (ML) of Cu and 1/3 ML of sulfate is formed by the underpotential deposition of Cu on Au(111) in sulfuric acid. Dynamic processes involved in the dissolution of the ordered phase for a potential step have been investigated by time-resolved surface-enhanced infrared absorption spectroscopy (SEIRAS) and chronoamperometry. The results demonstrate that the dissolution occurs through two successive steps. The initial step involves the desorption of 1/3 ML of Cu and 1/3 ML of sulfate via a Langmuir-type kinetics and the remaining 1/3 ML of Ca is desorbed in the subsequent step via a nucleation-and-growth kinetics. The observation is partly consistent with dynamic Monte Carlo simulations reported in the literature. (C) 2000 Elsevier Science S.A. All rights reserved.
Citation
ELECTROCHEMISTRY COMMUNICATIONS,2000,2(6):417-421
URI
http://dx.doi.org/10.1016/S1388-2481(00)00053-9
https://dspace.xmu.edu.cn/handle/2288/12932

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