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Electrodeposition of tantalum on carbon black in non-aqueous solution and its electrocatalytic properties

Title
Electrodeposition of tantalum on carbon black in non-aqueous solution and its electrocatalytic properties
Authors
Jo, AraLee, YoungmiLee, Chongmok
Ewha Authors
이종목이영미
SCOPUS Author ID
이종목scopus; 이영미scopus
Issue Date
2016
Journal Title
ANALYTICA CHIMICA ACTA
ISSN
0003-2670JCR Link1873-4324JCR Link
Citation
vol. 933, pp. 59 - 65
Keywords
Tantalum (Ta)Non-aqueous electrodepositionOxygen reductionElectrochemical biosensingHydrogen peroxide reduction
Publisher
ELSEVIER SCIENCE BV
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
In this work, we synthesized tantalum (Ta) nanoclusters on carbon black (Ta/CB) via simple electrodeposition in non-aqueous solvent, acetonitrile (ACN) at ambient temperature. Transmission electron microscopy (TEM) images showed that the electrodeposited Ta nanoclusters consisted of tiny Ta nano-particles. X-ray photoelectron spectroscopy (XPS) result represented that the outermost Ta formed the native oxide on Ta/CB due to its ambient exposure to air. Electrochemical catalytic properties of prepared Ta/CB on glassy carbon electrode (Ta/CB/GC) were investigated toward reductions of oxygen and hydrogen peroxide, and oxidations of ascorbic acid and dopamine. For oxygen reduction reaction (ORR) in acid, Ta/CB/GC represented a decent electrocatalytic performance which was better or comparable to bare Pt. The operational stability in acidic condition was maintained up to 500 repetitive potential cycles presumably due to the protective native Ta oxide layer. Ta/CB/GC also showed high amperometric sensitivity (4.5 (+/- 0.1(6)) mA mM(-1) cm(-2), n = 5) for reduction of hydrogen peroxide in 0.1 M phosphate buffer solution (PBS, pH 7.4). In addition, Ta/CB/GC was demonstrated for the possibility of simultaneous detection of ascorbic acid and dopamine using differential pulse voltammetry (DPV). (C) 2016 Elsevier B.V. All rights reserved.
DOI
10.1016/j.aca.2016.05.030
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자연과학대학 > 화학·나노과학전공 > Journal papers
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