Electrochemical Characterization of an Oleyl-coated Magnetite Nanoparticle-Modified Electrode
MetadataShow full item record
The electrochemical behavior of oleyl-coated Fe3O4 nanoparticles synthesized by chemical co-precipitation is investigated. An approach based on the formation of a film of nanoparticles on an electrode surface is employed together with cyclic voltammetry. Characterization by scanning electron microscopy, confocal Raman spectroscopy, and X-ray photoelectron spectroscopy shows that Fe3O4 nanoparticles with a particle size of 20 nm coated with oleic acid are synthesized. These nanoparticles show superparamagnetic behavior and form a homogeneous film from their solution when dried in air. The nanoparticle film electrodes display redox behavior in acidic media but not in alkaline media, which suggests that protons take part in the electrochemical reaction. It is estimated that there are about 240 layers of nanoparticles deposited on the surface and that only around 1% of these nanoparticles are electrochemically active. This is attributed to either the long-chain surfactant or the large number of layers of nanoparticles inhibiting the electron- transfer process.
Showing items related by title, author, creator and subject.
A fundamental study of infiltrated CeO2 and (Gd,Ce)O2 nanoparticles on the electrocatalytic activity of Pt cathodes of solid oxide fuel cellsAi, Na; Chen, Kongfa; Jiang, San Ping (2013)A thin Pt skeleton with a well-defined porous structure prepared on Y2O3–ZrO2 (YSZ) substrate is used as template to study the effect of impregnated pure CeO2 and Gd-doped CeO2 (GDC) nanoparticles on the electrochemical ...
A novel and simple route to prepare a Pt nanoparticle-loaded carbon nanofiberelectrode for hydrogen peroxide sensingLiu, Yang; Wang, D.; Xu, L.; Hou, H.; You, T. (2011)A facile wet-chemical method was developed to prepare a novel Pt nanoparticle-loaded carbon nanofiber (Pt/CNF) electrode. Without using any stabilizer or pretreatment procedure, large amounts of Pt nanoparticles could be ...
Performance and stability of (La,Sr)MnO3-Y2O3-ZrO2 composite oxygen electrodes under solid oxide electrolysis cell operation conditionsChen, Kongfa; Ai, Na; Jiang, San Ping (2012)The electrochemical performance and stability of (La,Sr)MnO3–Y2O3–ZrO2 (LSM-YSZ) composite oxygen electrodes is studied in detail under solid oxide electrolysis cells (SOECs) operation conditions. The introduction of YSZ ...