A sensitive nonenzymatic hydrogen peroxide sensor using cadmium oxide nanoparticles/multiwall carbon nanotube modified glassy carbon electrode

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DOIResolve DOI: http://doi.org/10.1016/j.jelechem.2013.12.028
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TypeArticle
Journal titleJournal of electroanalytical chemistry
ISSN1572-6657
Volume717-718
Pages4146; # of pages: 6
SubjectCadmium oxide; Multiwall carbon nanotube; Glassy carbon electrode; Hydrogen peroxide
AbstractA simple sensing scheme for hydrogen peroxide has been described by electrochemical deposition of cadmium oxide (CdO) nanoparticles with ∼50 nm in diameter on a glassy carbon (GC) electrode modified with multiwall carbon nanotubes (MWCNT). The CdO/MWCNT modified sensor, with a surface coverage of 1.13 × 10−8 mol/cm2, displayed high synergistic electrocatalytic activity for H2O2. The sensor was capable of reducing H2O2 at −1.2 V vs. Ag/AgCl (H2O2 + 2H+ + 2e− → 2H2O) in a broad pH range. At the optimal pH 7, the sensor exhibited a detection limit of 0.1 μM, broad linearity from 0.5 to 200 μM, good reproducibility (RSD of 5.9%), and long-term stability. Uric acid, ascorbic acid and dopamine up to 100 μM provoked no signal response, attesting selectivity of the CdO/MWCNT modified electrode for hydrogen peroxide.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; Aquatic and Crop Resource Development
Peer reviewedYes
NRC numberNRC-ACRD-56028
NPARC number21272463
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Record identifiered4397aa-140d-483e-a10a-635a8712313b
Record created2014-11-28
Record modified2016-05-09
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