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Nano Research 2015, 8(1): 140-155 https://doi.org/10.1007/s12274-014-0603-z
Research Article | Issue | Published: 07 November 2014

Phase-transfer interface promoted corrosion from PtNi10 nanoctahedra to Pt4Ni nanoframes

Show Author's Information Yu Wang,  Yueguang Chen,  Caiyun Nan,  Lingling Li,  Dingsheng Wang,  Qing Peng( ),  Yadong Li( )
Department of ChemistryTsinghua UniversityBeijing100084China
Keywords:
catalytic activity, corrosion, nanoframes, porous octahedra, phase-transfer interface, EDTA
Cite this article:
Wang Y, Chen Y, Nan C, et al. Phase-transfer interface promoted corrosion from PtNi10 nanoctahedra to Pt4Ni nanoframes. Nano Research, 2015, 8(1): 140-155. https://doi.org/10.1007/s12274-014-0603-z
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Abstract Full text Electronic supplementary material About this article

A novel two-phase approach towards the corrosion of PtNi10 nanoctahedra has been developed. In this strategy, the active component of Ni in oil-soluble PtNi10 nanoctahedra which resided in the upper toluene phase, suffered from etching and was then transferred into a lower aqueous phase with coordination by ethylenediaminetetraacetate (EDTA). Due to the existence of the phase-transfer interface promoted by EDTA, the corrosion reaction proceeded at an accelerated rate under the mild conditions. Specifically, the resultant products of octahedral Pt4Ni nanoframes were successfully fabricated for the first time, and PtNi4 porous octahedra could be obtained when the dosage of EDTA-2Na was reduced. After a systematic study of this two-phase system, a "synergetic corrosion" mechanism is proposed to account for the formation of octahedral Pt4Ni nanoframes, involving contributions from many species (i.e., O2, H2O, H+, OAm, and EDTA4-). As a result of the fascinating three-dimensional geometry of Pt4Ni nanoframes and PtNi4 porous octahedra, both of the corroded nanocrystals showed superior activity over the pristine PtNi10 nanoctahedra for ethanol electrooxidation in alkaline media and hydrogenation of nitrobenzene.


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Electronic supplementary material
About this article

Phase-transfer interface promoted corrosion from PtNi10 nanoctahedra to Pt4Ni nanoframes

Show Author's information Yu Wang, Yueguang Chen, Caiyun Nan, Lingling Li, Dingsheng Wang, Qing Peng( ), Yadong Li( )
Department of ChemistryTsinghua UniversityBeijing100084China

Abstract

A novel two-phase approach towards the corrosion of PtNi10 nanoctahedra has been developed. In this strategy, the active component of Ni in oil-soluble PtNi10 nanoctahedra which resided in the upper toluene phase, suffered from etching and was then transferred into a lower aqueous phase with coordination by ethylenediaminetetraacetate (EDTA). Due to the existence of the phase-transfer interface promoted by EDTA, the corrosion reaction proceeded at an accelerated rate under the mild conditions. Specifically, the resultant products of octahedral Pt4Ni nanoframes were successfully fabricated for the first time, and PtNi4 porous octahedra could be obtained when the dosage of EDTA-2Na was reduced. After a systematic study of this two-phase system, a "synergetic corrosion" mechanism is proposed to account for the formation of octahedral Pt4Ni nanoframes, involving contributions from many species (i.e., O2, H2O, H+, OAm, and EDTA4-). As a result of the fascinating three-dimensional geometry of Pt4Ni nanoframes and PtNi4 porous octahedra, both of the corroded nanocrystals showed superior activity over the pristine PtNi10 nanoctahedra for ethanol electrooxidation in alkaline media and hydrogenation of nitrobenzene.

Keywords: catalytic activity, corrosion, nanoframes, porous octahedra, phase-transfer interface, EDTA

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Publication history
Copyright
Acknowledgements

Publication history

Received: 25 August 2014
Revised: 23 September 2014
Accepted: 30 September 2014
Published: 07 November 2014
Issue date: January 2015

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2014

Acknowledgements

Acknowledgements

We appreciate the financial support from the National Natural Science Foundation of China (21325101, 21171105, 21231005). We also thank Wenjun Jiang the measurement of FT-IR spectra.

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