Pt hollow nanospheres/graphene electrocatalytic ability toward sodium borohydride oxidation: a study of morphology effect on electrocatalytic activity
| Autor: | Roudabeh Valiollahi, Reza Ojani |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Nanocomposite
Graphene General Chemical Engineering Inorganic chemistry chemistry.chemical_element Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst Electrochemistry 01 natural sciences 0104 chemical sciences law.invention Sodium borohydride chemistry.chemical_compound chemistry law Materials Chemistry 0210 nano-technology Platinum Cobalt Nuclear chemistry |
| Zdroj: | Journal of Applied Electrochemistry. 47:205-212 |
| ISSN: | 1572-8838 0021-891X |
| DOI: | 10.1007/s10800-016-1009-2 |
| Popis: | Platinum hollow nanospheres (HNPt) are synthesized via a galvanic replacement reaction between as-prepared cobalt nanoparticles and Pt4+ (H2PtCl6) ions. Support graphene nanosheets are also prepared using a chemical route for HNPt immobilization. Morphology and chemical composition of the as-prepared nanocomposite are characterized by transmission electron microscopy and energy dispersion X-ray spectroscopy, respectively. The prepared nanocomposite electrocatalytic activity toward sodium borohydride oxidation is studied by electrochemical techniques. To investigate the morphology effect of electrocatalytic behavior, Pt solid nanoparticles are also synthesized and immobilized on graphene support (NPt/G), and its electrocatalytic activity is studied. Results show that the electrocatalyst’s morphology has a significant effect on electrocatalytic activity, as HNPt/G shows a superior electrocatalytic activity in comparison with NPt/G toward sodium borohydride oxidation. |
| Databáze: | OpenAIRE |
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