Coordination complex synthesis of noble metals in the preparation of nanoparticles supported on MWCNTs used as electrocatalysts
| Autor: | S. Fuentes Moyado, E.A. Reynoso, Gabriel Alonso-Núñez, Jassiel R. Rodriguez, R.M. Félix |
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| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis Inorganic chemistry Nanoparticle Chronoamperometry Electrocatalyst Coordination complex Inorganic Chemistry chemistry.chemical_compound Chemical engineering chemistry Materials Chemistry Tetraoctylammonium bromide Physical and Theoretical Chemistry Cyclic voltammetry Bimetallic strip |
| Zdroj: | Inorganica Chimica Acta. 406:138-145 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/j.ica.2013.06.042 |
| Popis: | Coordination complex salts were synthesized in an aqueous solution and used as precursors to prepare metallic and bimetallic nanoparticles supported on multiwalled carbon nanotubes (MWCNTs) to be applied as electrocatalysts on methanol electrooxidation. The precursors were obtained by the reaction between (NH4)2PtCl6, (NH4)2PdCl6, (NH4)3RuCl6 and HAuCl4 with tetraoctylammonium bromide (TOAB). These were obtained as (TOA)nMCly salts (where “M” = Pt, Pd, Ru or Au) and were characterized by FT-IR and TGA analysis. The precursors were used to prepare metallic and bimetallic nanoparticles of Pt, Pt–Pd, Pt–Ru, as well as Pt–Au coated on MWCNT (Pt–M/MWCNTs, where M = Pd, Ru or Au). Materials were characterized by TEM, XRD and TGA. The electrocatalytic properties of the Pt–M/MWCNTs electrodes for the methanol oxidation were determined by cyclic voltammetry (CV) and chronoamperometry (CA). The bimetallic nanoparticles presented a higher electrocatalytic activity and stability than the Pt/MWCNTs electrocatalyst, attributed to the addition of “M” which not only led to a smaller average particle size and higher dispersion of Pt of the metallic nanoparticles on MWCNTs but also promoted an elevated electronic transfer between bimetallic nanoparticles. |
| Databáze: | OpenAIRE |
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