2002
DOI: 10.1021/ac010734+
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Scanning Tunneling Microscopic and Voltammetric Studies of the Surface Structures of an Electrochemically Activated Glassy Carbon Electrode

Abstract: The microscopic surface structures of electrochemically activated glassy carbon have been examined by scanning tunneling microscopy. Experimental results demonstrate that there are two different types of electrode surface sites, corresponding to the bundles and bundle edges of the fibrous graphite microcrystallities. Electrochemical activation results in the formation of new void spaces of different sizes, and the structures are affected by the electrochemical activation procedures employed. The void volume re… Show more

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Cited by 65 publications
(52 citation statements)
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References 32 publications
(78 reference statements)
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“…The electrode was activated by cyclic voltammetry between -0.3 and +2.0 V in 0.5 M H2SO4 at 0.1 V/s until stable voltammograms were obtained. 32 Layer-by-layer (LbL) self-assembly of PDDA and MWCNT-PB composite, designated as {PDDA/MWCNT-PB}n, was carried out as follows. The activated GC electrode with negative surface charges was treated with an aqueous solution of 1 wt% positively charged PDDA in 0.5 M NaCl for 20 min.…”
Section: Preparation Of {Pdda/mwcnt-pb}n Multilayer Filmsmentioning
confidence: 99%
“…The electrode was activated by cyclic voltammetry between -0.3 and +2.0 V in 0.5 M H2SO4 at 0.1 V/s until stable voltammograms were obtained. 32 Layer-by-layer (LbL) self-assembly of PDDA and MWCNT-PB composite, designated as {PDDA/MWCNT-PB}n, was carried out as follows. The activated GC electrode with negative surface charges was treated with an aqueous solution of 1 wt% positively charged PDDA in 0.5 M NaCl for 20 min.…”
Section: Preparation Of {Pdda/mwcnt-pb}n Multilayer Filmsmentioning
confidence: 99%
“…While the effects of GC pretreatment by anodic oxidation on the electro oxidation of some small organic molecules have been studied [8][9][10], none has studied such effects on the glucose electrocatalytic oxidation albeit of equal importance. Electrochemical pretreatment of glassy carbon (GC) is performed by anodic oxidation [11,12], cathodic reduction [13]or potential cycling [14,15]. The above processes took place in different media, e.g., acidic or alkaline electrolytes.…”
Section: Introductionmentioning
confidence: 99%
“…The electron mediator 3,4-dihydroxybenzaldehyde (3,4-DHB) has been found to modify carbon electrodes with an electroactive film derived from this mediator (Pariente et al, 1994(Pariente et al, , 1995(Pariente et al, , 1996(Pariente et al, , 1997Pamidi and Wang, 1996;Lorenzo et al, 1998;Tobalina et al, 1998;Tzang et al, 2001;Hong et al, 2002;Shi and Shiu, 2002;Antiochia et al, 2004a,b;Delbem et al, 2002;Prieto-Simón and Fàbregas, 2004). The redox species comprising the film has a lower formal potential than 3,4-DHB, favorable kinetics for NADH oxidation, and has been demonstrated to be base stable in the pH region where PDH is expected to have high activity.…”
Section: Introductionmentioning
confidence: 99%