Spontaneous formation of nanoparticles on electrospun nanofibres
| Autor: | Calum R. I. Chisholm, Fernando Campos, Norbert Radacsi, Konstantinos P. Giapis |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Science General Physics and Astronomy Nanoparticle chemistry.chemical_element 02 engineering and technology Electrolyte fuel cells 010402 general chemistry 01 natural sciences Article General Biochemistry Genetics and Molecular Biology chemistry.chemical_compound lcsh:Science electrospinning chemistry.chemical_classification Multidisciplinary General Chemistry Polymer 021001 nanoscience & nanotechnology Phosphate Electrospinning 0104 chemical sciences chemistry Chemical engineering Caesium Electrode Fuel cells lcsh:Q nanoparticles 0210 nano-technology |
| Zdroj: | Radacsi, N, Campos, F, Chisholm, C & Giapis, K P 2018, ' Spontaneous formation of nanoparticles on electrospun nanofibres ', Nature Communications, vol. 9, 4740, pp. 1-8 . https://doi.org/10.1038/s41467-018-07243-5 Nature Communications, Vol 9, Iss 1, Pp 1-8 (2018) Nature Communications |
| DOI: | 10.1038/s41467-018-07243-5 |
| Popis: | We report the spontaneous formation of nanoparticles on smooth nanofibres in a single-step electrospinning process, as an inexpensive and scalable method for producing high-surface-area composites. Layers of nanofibres, containing the proton conducting electrolyte, caesium dihydrogen phosphate, are deposited uniformly over large area substrates from clear solutions of the electrolyte mixed with polymers. Under certain conditions, the normally smooth nanofibres develop caesium dihydrogen phosphate nanoparticles in large numbers on their external surface. The nanoparticles appear to originate from the electrolyte within the fibres, which is transported to the outer surface after the fibres are deposited, as evidenced by cross-sectional imaging of the electrospun fibres. The presence of nanoparticles on the fibre surface yields composites with increased surface area of exposed electrolyte, which ultimately enhances electrocatalytic performance. Indeed, solid acid fuel cells fabricated with electrodes from processed nanofibre-nanoparticle composites, produced higher cell voltage as compared to fuel cells fabricated with state-of-the-art electrodes. Uniformly distributing nanoparticles on nanofibres can benefit electrocatalysis by increasing surface area, but it is complex. Here the authors use facile, inexpensive, nozzle-free electrospinning to produce dispersed nanoparticles on nanofibres, attaining increased voltage in a commercial-scale fuel cell. |
| Databáze: | OpenAIRE |
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