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Highly Active Nickel Nanoparticles Supported on TiO 2 Nanotube Electrodes for Methanol Electrooxidation
Author(s) -
Hosseini M. G.,
Momeni M. M.,
Faraji M.
Publication year - 2010
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.200900620
Subject(s) - cyclic voltammetry , materials science , chronoamperometry , dielectric spectroscopy , titanium dioxide , nanoparticle , inorganic chemistry , nickel , chemical engineering , titanium , nanotube , anodizing , electrode , electrochemistry , carbon nanotube , nanotechnology , chemistry , metallurgy , aluminium , engineering
Nickel nanoparticles/TiO 2 nanotubes/Ti electrodes were prepared by galvanic deposition of nickel nanoparticles on the TiO 2 nanotubes layer on titanium substrates. Titanium oxide nanotubes were fabricated by anodizing titanium foil in a DMSO fluoride‐containing electrolyte. The morphology and surface characteristics of titanium dioxide nanotubes and Ni/TiO 2 /Ti electrodes were investigated using scanning electron microscopy and energy‐dispersive X‐ray spectroscopy, respectively. The results indicated that nickel nanoparticles were homogeneously deposited on the surface of TiO 2 nanotubes. The electrocatalytic behaviour of nickel nanoparticles/TiO 2 /Ti electrodes for the methanol electrooxidation was studied by electrochemical impedance spectroscopy, cyclic voltammetry, differential pulse voltammetry and chronoamperometry methods. The results showed that Ni/TiO 2 /Ti electrodes exhibit a considerably higher electrocatalytic activity toward the oxidation of methanol.