A nanostructured sensor of hydrogen peroxide

6533b862fe1ef96bd12c64dd

RESEARCH PRODUCT

A nanostructured sensor of hydrogen peroxide

Salvatore Piazza Bernardo Patella Carmelo Sunseri Rosalinda Inguanta

subject

Materials science Analytical chemistry Nanowire Palladium nanowire Surfaces Coatings and Film Nanoparticle Condensed Matter Physic 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Specific surface area Materials Chemistry Electrical and Electronic Engineering Hydrogen peroxide Instrumentation Materials Chemistry2506 Metals and Alloy Electronic Optical and Magnetic Material Metals and Alloys Chronoamperometry Displacement deposition Hydrogen peroxide 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Electrochemical gas sensor Template synthesi Settore ING-IND/23 - Chimica Fisica Applicata Electrochemical sensor chemistry Chemical engineering Electrode Non-enzymatic sensor 2506 Cyclic voltammetry 0210 nano-technology

description

Abstract A nanostructured electrochemical sensor of hydrogen peroxide was fabricated growing self-standing Pd nanowires (Pd NWs) into polycarbonate (PC) membranes through a simple metal galvanic deposition. Conditions of deposition were adjusted in order to attain 2–5 μm long Pd wires. Characterization of Pd-NWs was performed by scanning electrode microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction. Properties of the nanostructured sensor were studied by cyclic voltammetry and chronoamperometry in phosphate buffer—ethanol solution. Addition of pure ethanol to the test solution was essential in order to increase wettability of the nanostructures. Sensing features were compared with those of both compact and nanoparticle film. Results show stable behavior and sensitive response of Pd NWs towards H 2 O 2 with a wide linear dependence over H 2 O 2 concentration for the electrodes consisting of long Pd nanowires/nanotubes, which display an increase of sensitivity and lower limit of detection (LOD) in comparison with the other sensors. Also the linear-response interval widens with electrode specific surface area. Accuracy and selectivity (towards different electroactive species) is excellent.

year	journal	country	edition	language
2017-06-01	Sensors and Actuators B: Chemical

https://doi.org/10.1016/j.snb.2017.01.106