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Cobalt Doped Titanium Dioxide Nanoparticles: Synthesis, Characterization and Electrocatalytic Study
Author(s) -
Bagheri Samira,
Chekin Fereshteh,
Hamid Sharifah Bee Abd
Publication year - 2014
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201300486
Subject(s) - linear sweep voltammetry , titanium dioxide , chemistry , electrocatalyst , cyclic voltammetry , oxygen evolution , titanium , electrolysis , chemical engineering , crystallite , nanoparticle , cobalt , nuclear chemistry , inorganic chemistry , electrode , electrochemistry , electrolyte , organic chemistry , engineering , crystallography
In this work, green synthesis of cobalt doped titanium dioxide (Co‐TiO 2 ) has been carried out in aqueous medium using gelatin. The Co‐TiO 2 particles have been characterized using transmission electron microscopy (TEM), X‐ray diffraction (XRD), energy dispersive X‐ray (EDAX), FT‐IR spectroscopy and voltammetry techniques. XRD results show pure Co‐TiO 2 and TiO 2 powders with average crystallite size about 12 nm and 15 nm, respectively. Co loaded in TiO 2 hasn't influence crystalline structure. Moreover, efficient Co‐TiO 2 ‐based anode was fabricated by casting of the Co‐TiO 2 solution on glassy carbon electrode (Co‐TiO 2 /GCE). The electrocatalysis of oxygen evolution reaction (OER) at Co‐TiO 2 /GCE has been examined using linear scanning voltammetry (LSV) in alkaline media. The OER is significantly enhanced at Co‐TiO 2 /GCE, as demonstrated by a negative shift in the LSV curve at the Co‐TiO 2 /GCE compared to that obtained at the unmodified one. The value of energy saving of oxygen gas at a current density of 5 mA cm −2 is 12.6 kW h kg −1 . The low cost as well as the marked stability of the modified electrode make it promising candidate in industrial water electrolysis process.