Synthesis of highly active SnO2-CNTs supported Pt-on-Au composite catalysts through site-selective electrodeposition for HCOOH electrooxidation

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DOIResolve DOI: http://doi.org/10.1016/j.electacta.2013.08.189
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TypeArticle
Journal titleElectrochimica Acta
ISSN0013-4686
Volume112
Pages480485; # of pages: 6
SubjectElectrochemical measurements; Glassy carbon electrodes; High performance composites; Morphology and composition; Site selective; Thermal transformations; Excitons; Formic acid; Glass membrane electrodes; Gold deposits; High resolution transmission electron microscopy; Synthesis (chemical); Tin; X ray diffraction; Platinum
AbstractIn this paper, site-selective electrodeposition method is developed to prepare Pt-on-Au composite catalysts for HCOOH electrooxidation. In the synthesis, Au nanoparticles are prepared through reduction of NaAuCl4 by Sn(OH)2 supported on carbon nanotubes and after thermal transformation of Sn(OH)2 to SnO2, composite supports (Au/SnO2-CNTs) were obtained. By adjusting the potential of Au/SnO2-CNTs coated glassy carbon electrode, Pt entities are selectively deposited on Au particles to form SnO2-CNTs supported Pt-on-Au composite catalysts. The morphology and composition of the formed composite catalysts are characterized by instrument techniques such as X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). The site-selectivity of Pt electrodeposition on Au is confirmed by electrochemical measurements. The composite catalysts are tested to have high Pt mass activity toward HCOOH oxidation reaction, demonstrating that the synthesis method developed in this paper has promising potential for developing high performance composite catalysts. The Pt content effect on the catalytic activity is also tested for catalyst performance optimization.
Publication date
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
NPARC number21270410
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Record identifier7f943310-f9cc-40b1-b75c-df51d99799bf
Record created2014-02-07
Record modified2016-05-09
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