Title: Chronoamperometric-based detection of hydrogen peroxide using palladium nanoparticles

Authors: Hamdi Baccar; Clara P. Adams; Adnane Abdelghani; Sherine O. Obare

Addresses: Department of Chemistry, Western Michigan University, Kalamazoo, MI, USA; Nanotechnology Laboratory, National Institute of Applied Science and Technology, Carthage University, Bp676, Centre Urbain Nord, Tunisia ' Department of Chemistry, Western Michigan University, Kalamazoo, MI, USA ' Nanotechnology Laboratory, National Institute of Applied Science and Technology, Carthage University, Bp676, Centre Urbain Nord, Tunisia ' Department of Chemistry, Western Michigan University, Kalamazoo, MI, USA

Abstract: Monodisperse palladium nanoparticles were used to develop a chronoamperometric-based sensor for the detection of hydrogen peroxide (H₂O₂). Thioether stabilised palladium nanoparticles with diameters of 1.8 nm, 2.0 nm and 3.0 nm were synthesised using a pyrolysis method. The palladium nanoparticles were immobilised on gold electrode surfaces using an organic linker. The effect of particle size on sensor performance was evaluated. The sensor was effective in detecting H₂O₂ in a Phosphate-Buffered Saline (PBS) solution and in milk samples. Detection limits of 45 µM and 75 µM, respectively, were obtained. The sensitivity of the sensor allowed detection of H₂O₂ at levels below the maximum admissible concentration.

Keywords: palladium nanoparticles; hydrogen peroxide detection; chronoamperometry; milk; chronoamperometric based sensors; particle size; sensor performance.

DOI: 10.1504/IJNT.2013.053525

International Journal of Nanotechnology, 2013 Vol.10 No.5/6/7, pp.563 - 576

Published online: 27 Apr 2013 *

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