Title
Role of gold adatoms in the stability and electrochemical behavior of gold surfaces modified with phthalocyanines Role of gold adatoms in the stability and electrochemical behavior of gold surfaces modified with phthalocyanines
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Pennington, N.J. ,
Subject
Chemistry
Source (journal)
Electrochemical and solid-state letters / Electrochemical Society [New York] - Pennington, N.J.
Volume/pages
8(2005) :4 , p. C65-C68
ISSN
1099-0062
ISI
000228326500018
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
This paper describes the role of adatoms in the electrochemical behavior of gold electrodes modified with metal ion tetrasulphonated phthalocyanines (MTSPc). After electrodeposition of MTSPc (M = Cu(II), Fe(III), Co(II), and Al(III)) the long-term stability of the modified electrodes was investigated. It took about 1000 scans before the electrode showed a constant behavior. During the scanning the MTSPc adsorption peak potentials shifted from their initial value to a value of 0.36 V vs. SCE, which is related to the redox reactions of the gold adatoms. After a long scanning procedure, the amount of these adatoms increases and controls the redox reactions of the deposited MTSPc.
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