Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 23, Issue 4, Pages 483-490Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S2095-4956(14)60175-3
Keywords
coordination complex salt; MWCNTs; nanoparticles; catalysts; electrooxidation
Funding
- CONACyT [155388, 174689]
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This work reports a feasible synthesis of highly-dispersed Pt and Pt-Fe nanoparticles supported on multiwall carbon nanotubes (MWCNTs) without Fe and multiwall carbon nanotubes with iron (MWCNTs-Fe) which applied as electrocatalysts for methanol electrooxidation. A Pt coordination complex salt was synthesized in an aqueous solution and it was used as precursor to prepare Pt/MWCNTs, Pt/MWCNTs-Fe, and Pt-Fe/MWCNTs using FeCl2 center dot 4H(2)O as iron source which were named Si, S2 and S3, respectively. The coordination complex of platinum (TOA)(2)PtCl6 was obtained by the chemical reaction between (NH4)(2)PtCl6 with tetraoctylammonium bromide (TOAB) and it was characterized by FT-IR and TGA. The materials were characterized by Raman spectroscopy, SEM, EDS, XRD, TEM and TGA. The electrocatalytic activity of Pt-based supported on MWCNTs in the methanol oxidation was investigated by cyclic voltammetry (CV) and chronoamperometry (CA). Pt-Fe/MWCNTs electrocatalysts showed the highest electrocatalytic activity and stability among the tested electrocatalysts due to that the addition of Fe promotes the OH species adsorption on the electrocatalyst surface at low potentials, thus, enhancing the activity toward the methanol oxidation reaction (MOR).
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