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- Title
Deposition of PdPtAu Nanoparticles on Hollow Nanospheres of Fe<sub>3</sub>O<sub>4</sub> as a New Catalyst for Methanol Electrooxidation: Application in Direct Methanol Fuel Cell.
- Authors
Haghnegahdar, Sara; Noroozifar, Meissam
- Abstract
In this study, immobilized hollow nanospheres of Fe3O4 with Palladium, Platinum and Gold nanoparticles (Fe3O4HNS-PdPtAuNPs) was synthesized by hydrothermal and chemical reduction methods and characterized by various techniques such as field emission scanning electron microscopy, energy dispersive analysis of X-rays and elemental mapping images. The electrocatalytic activity of the modified glassy carbon electrode (GCE) with Fe3O4HNS-PdPtAuNPs (GCE/Fe3O4HNS-PdPtAuNPs) toward methanol electrooxidation was investigated by cyclic voltammetry and chronoamperometry in 1 M NaOH solution. According to the results, Fe3O4HNS-PdPtAuNPs catalyst demonstrated the highest efficiency for methanol electrooxidation in comparison with Fe3O4HNS-PdNPs, Fe3O4HNS-PtNPs, Fe3O4HNS-PdAuNPs, Fe3O4HNS-PtAuNPs and Fe3O4HNS-PdPtNPs. The value of electron transfer coefficient ( α) and the ratio of current densities ( If/ Ib) for methanol oxidation on the Fe3O4HNS-PdPtAuNPs/GC catalyst were calculated 0.61 and 5.13, respectively. The reaction order was discovered to be 0.98 for CH3OH. A direct methanol fuel cell was developed with the suggested catalyst under several conditions.
- Subjects
GOLD nanoparticles; PLATINUM nanoparticles; ELECTROLYTIC oxidation; FUEL cells; CHEMICAL reduction
- Publication
Electroanalysis, 2017, Vol 29, Issue 12, p2896
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201700124