Graphene-TiO2 composite supported Pt electrocatalyst for oxygen reduction reaction

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DOIResolve DOI: http://doi.org/10.1016/j.electacta.2013.05.155
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TypeArticle
Journal titleElectrochimica Acta
ISSN0013-4686
Volume107
Pages509517; # of pages: 9
SubjectElectrocatalytic activity; Electrocatalytic behavior; Functionalized graphene; Oxygen Reduction; Oxygen reduction reaction; Pt nanoparticles; Pt-based catalyst; Rotating disk electrodes; Catalyst activity; Cyclic voltammetry; Electrolytic reduction; Graphene; Oxides; Rotating disks; Scanning electron microscopy; Titanium dioxide; Transmission electron microscopy; Platinum
AbstractA nano-sized Pt catalyst supported onto titanium dioxide functionalized graphene nanosheets (TiO2-FGSs) was prepared using the polyol method and utilized for a catalyst activity investigation toward the oxygen reduction reaction (ORR). The electrochemical and microscopic studies were carried out using a 40 wt.% Pt/TiO2-FGS catalyst. Cyclic voltammetry and the rotating disk electrode experiments were performed in 0.5 M H2 SO4 and 0.1 M KOH solutions in order to investigate the electrocatalytic behavior of the prepared catalysts. The composite catalyst samples were characterized by scanning electron microscopy and transmission electron microscopy showing a good dispersion of the Pt particles on the surface of the graphene supported TiO2 particles. The average Pt particle size was 11 ± 2 nm. The values of specific activity and other kinetic parameters were determined from the Tafel plots taking into account the real electroactive area of each electrode. The electrodes exhibited a relatively high electrocatalytic activity for the four-electron reduction of oxygen to water.
Publication date
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
NPARC number21270411
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Record identifierf370d4d6-2e9e-436c-9701-6dee6a6b1d0e
Record created2014-02-07
Record modified2016-05-09
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