Kinetic study of Pt nanocrystal deposition on Ag nanowires with clean surfaces via galvanic replacement

Yu Lin Shen; Shih Yun Chen; Jenn Ming Song; In Gann Chen

doi:10.1186/1556-276X-7-245

Kinetic study of Pt nanocrystal deposition on Ag nanowires with clean surfaces via galvanic replacement

Yu Lin Shen, Shih Yun Chen, Jenn Ming Song, In Gann Chen

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Without using any templates or surfactants, this study develops a high-yield process to prepare vertical Ag-Pt core-shell nanowires (NWs) by thermally assisted photoreduction of Ag NWs and successive galvanic replacement between Ag and Pt ions. The clean surface of Ag nanowires allows Pt ions to reduce and deposit on it and forms a compact sheath comprising Pt nanocrystals. The core-shell structural feature of the NWs thus produced has been demonstrated via transmission electron microscopy observation and Auger electron spectroscopy elemental analysis. Kinetic analysis suggests that the deposition of Pt is an interface-controlled reaction and is dominated by the oxidative dissolution of Ag atoms. The boundaries in between Pt nanocrystals may act as microchannels for the transport of Ag ions during galvanic replacement reactions.

Original language	English
Article number	245
Journal	Nanoscale Research Letters
Volume	7
DOIs	https://doi.org/10.1186/1556-276X-7-245
Publication status	Published - 2012

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics

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10.1186/1556-276X-7-245

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title = "Kinetic study of Pt nanocrystal deposition on Ag nanowires with clean surfaces via galvanic replacement",

abstract = "Without using any templates or surfactants, this study develops a high-yield process to prepare vertical Ag-Pt core-shell nanowires (NWs) by thermally assisted photoreduction of Ag NWs and successive galvanic replacement between Ag and Pt ions. The clean surface of Ag nanowires allows Pt ions to reduce and deposit on it and forms a compact sheath comprising Pt nanocrystals. The core-shell structural feature of the NWs thus produced has been demonstrated via transmission electron microscopy observation and Auger electron spectroscopy elemental analysis. Kinetic analysis suggests that the deposition of Pt is an interface-controlled reaction and is dominated by the oxidative dissolution of Ag atoms. The boundaries in between Pt nanocrystals may act as microchannels for the transport of Ag ions during galvanic replacement reactions.",

author = "Shen, {Yu Lin} and Chen, {Shih Yun} and Song, {Jenn Ming} and Chen, {In Gann}",

note = "Funding Information: The authors thank the National Science Council of Taiwan for funding, NSC 100-2120-M-006-006, to support this work.",

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doi = "10.1186/1556-276X-7-245",

language = "English",

volume = "7",

journal = "Nanoscale Research Letters",

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TY - JOUR

T1 - Kinetic study of Pt nanocrystal deposition on Ag nanowires with clean surfaces via galvanic replacement

AU - Shen, Yu Lin

AU - Chen, Shih Yun

AU - Song, Jenn Ming

AU - Chen, In Gann

N1 - Funding Information: The authors thank the National Science Council of Taiwan for funding, NSC 100-2120-M-006-006, to support this work.

PY - 2012

Y1 - 2012

N2 - Without using any templates or surfactants, this study develops a high-yield process to prepare vertical Ag-Pt core-shell nanowires (NWs) by thermally assisted photoreduction of Ag NWs and successive galvanic replacement between Ag and Pt ions. The clean surface of Ag nanowires allows Pt ions to reduce and deposit on it and forms a compact sheath comprising Pt nanocrystals. The core-shell structural feature of the NWs thus produced has been demonstrated via transmission electron microscopy observation and Auger electron spectroscopy elemental analysis. Kinetic analysis suggests that the deposition of Pt is an interface-controlled reaction and is dominated by the oxidative dissolution of Ag atoms. The boundaries in between Pt nanocrystals may act as microchannels for the transport of Ag ions during galvanic replacement reactions.

AB - Without using any templates or surfactants, this study develops a high-yield process to prepare vertical Ag-Pt core-shell nanowires (NWs) by thermally assisted photoreduction of Ag NWs and successive galvanic replacement between Ag and Pt ions. The clean surface of Ag nanowires allows Pt ions to reduce and deposit on it and forms a compact sheath comprising Pt nanocrystals. The core-shell structural feature of the NWs thus produced has been demonstrated via transmission electron microscopy observation and Auger electron spectroscopy elemental analysis. Kinetic analysis suggests that the deposition of Pt is an interface-controlled reaction and is dominated by the oxidative dissolution of Ag atoms. The boundaries in between Pt nanocrystals may act as microchannels for the transport of Ag ions during galvanic replacement reactions.

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Kinetic study of Pt nanocrystal deposition on Ag nanowires with clean surfaces via galvanic replacement

Abstract

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