One-dimensional Pt nanofibers formed by the redox reaction at the ionic liquid|water interface
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- Zhang, Yu
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
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- Nishi, Naoya
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
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- Amano, Ken ichi
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
Abstract
Pt nanofibers have been prepared with a redox reaction occurring spacio-selectively at the liquid-liquid interface between a highly hydrophobic ionic liquid (IL) and water (W), which has been utilized as two-dimensional reaction field. The preparation is conducted based on the concept of the coupling between ion transfer (IT) and electron transfer (ET) across the IL|W interface, which previously enabled direct formation of dendritic Au nanofibers at the IL|W interface (Chem. Commun., 2015, 51, 13638). The successful preparation of Pt nanofibers has manifested the generality of the IL|W interface method for the formation of metal nanofibers. Electrochemical measurements at the IL|W interface have confirmed that IT of PtCl₄²⁻ from W to IL is actually coupled with ET between PtCl₄²⁻ initially dissolved in W and decamethylferrocene in IL, leading to the spontaneous formation of Pt nanofibers at the IL|W interface. Herein, IT of PtCl₄²⁻ ions from W to IL not merely neutralizes the excess charges generated in each liquid phase by ET, but also provides PtCl₄²⁻ into IL as reactants for the growth of Pt nanofibers that takes place at the IL side of the IL|W interface. The electrocatalytic activity of the Pt nanofibers in oxygen reduction reaction (ORR) has also been evaluated.
Journal
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- Electrochimica Acta
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Electrochimica Acta 282 886-891, 2018-08-20
Elsevier Ltd
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Keywords
Details 詳細情報について
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- CRID
- 1050004225378977408
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- NII Article ID
- 120006886558
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- ISSN
- 00134686
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- HANDLE
- 2433/254668
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- CiNii Articles