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Electrodeposited Silver Nanoparticles on Carbon Ionic Liquid Electrode for Electrocatalytic Sensing of Hydrogen Peroxide
Author(s) -
Safavi Afsaneh,
Maleki Norouz,
Farjami Elaheh
Publication year - 2009
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200804577
Subject(s) - overpotential , ionic liquid , hydrogen peroxide , detection limit , nanoparticle , materials science , silver nanoparticle , electrode , aqueous solution , inorganic chemistry , carbon fibers , electrochemistry , chemical engineering , chemistry , catalysis , nanotechnology , organic chemistry , chromatography , composite material , composite number , engineering
Silver nanoparticles (narrowly dispersed in diameter) were electrodeposited on carbon ionic liquid electrode (CILE) surface using a two‐step potentiostatic method. Potentiostatic double pulse technique was used as a suitable and simple method for controlling the size and morphologies of silver nanoparticles electrodeposited on CILE. The obtained silver nanoparticles deposited on CILE surface showed excellent electrocatalytic activity (low overpotential of −0.35 V vs. Ag/AgCl) towards reduction of hydrogen peroxide. A linear dynamic range of 2–200 μM with an experimental detection limit of 0.7 μM ( S / N =3) and reproducibility of 4.1% ( n =5) make the constructed sensor suitable for peroxide determination in aqueous solutions.