Ultrathin oxide shell coating of metal nanoparticles using ionic liquid/metal sputtering

Tsukasa Torimoto, Yasuhiro Ohta, Kazuki Enokida, Daisuke Sugioka, Tatsuya Kameyama, Takahisa Yamamoto, Tamaki Shibayama, Kazuki Yoshii, Tetsuya Tsuda, Susumu Kuwabata

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The surface coating of metal nanoparticles resulting into core-shell structures is expected to improve the physicochemical properties of the nanoparticle cores without changing their size and shape. Here, we developed a novel strategy to coat Au, AuPd or Pt catalyst cores having average sizes smaller than 2.5 nm, which were pre-synthesized in ionic liquids by corresponding metal sputtering, with an extremely thin In2O3 layer (ca. <1.5 nm) by sputter deposition of indium in a room-temperature ionic liquid. The metal cores of Au or AuPd in core-shell particles exhibited superior stability against heat treatments or during electrocatalytic reactions compared to the corresponding bare metal particles. The In2O3 shell coating considerably enhanced the durability of electrocatalytically active Pt particles (1.2 nm). This sequential metal sputter deposition of different metals in ionic liquids will considerably contribute to the exploitation of key nanostructured components for next-generation energy-conversion systems.

Original languageEnglish
Pages (from-to)6177-6186
Number of pages10
JournalJournal of Materials Chemistry A
Volume3
Issue number11
DOIs
Publication statusPublished - 2015 Mar 21
Externally publishedYes

Fingerprint

Ionic Liquids
Metal nanoparticles
Liquid metals
Ionic liquids
Oxides
Sputtering
Metals
Coatings
Sputter deposition
Indium
Energy conversion
Durability
Heat treatment
Nanoparticles
Catalysts

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Torimoto, T., Ohta, Y., Enokida, K., Sugioka, D., Kameyama, T., Yamamoto, T., ... Kuwabata, S. (2015). Ultrathin oxide shell coating of metal nanoparticles using ionic liquid/metal sputtering. Journal of Materials Chemistry A, 3(11), 6177-6186. https://doi.org/10.1039/c4ta06643j

Ultrathin oxide shell coating of metal nanoparticles using ionic liquid/metal sputtering. / Torimoto, Tsukasa; Ohta, Yasuhiro; Enokida, Kazuki; Sugioka, Daisuke; Kameyama, Tatsuya; Yamamoto, Takahisa; Shibayama, Tamaki; Yoshii, Kazuki; Tsuda, Tetsuya; Kuwabata, Susumu.

In: Journal of Materials Chemistry A, Vol. 3, No. 11, 21.03.2015, p. 6177-6186.

Research output: Contribution to journalArticle

Torimoto, T, Ohta, Y, Enokida, K, Sugioka, D, Kameyama, T, Yamamoto, T, Shibayama, T, Yoshii, K, Tsuda, T & Kuwabata, S 2015, 'Ultrathin oxide shell coating of metal nanoparticles using ionic liquid/metal sputtering', Journal of Materials Chemistry A, vol. 3, no. 11, pp. 6177-6186. https://doi.org/10.1039/c4ta06643j
Torimoto T, Ohta Y, Enokida K, Sugioka D, Kameyama T, Yamamoto T et al. Ultrathin oxide shell coating of metal nanoparticles using ionic liquid/metal sputtering. Journal of Materials Chemistry A. 2015 Mar 21;3(11):6177-6186. https://doi.org/10.1039/c4ta06643j
Torimoto, Tsukasa ; Ohta, Yasuhiro ; Enokida, Kazuki ; Sugioka, Daisuke ; Kameyama, Tatsuya ; Yamamoto, Takahisa ; Shibayama, Tamaki ; Yoshii, Kazuki ; Tsuda, Tetsuya ; Kuwabata, Susumu. / Ultrathin oxide shell coating of metal nanoparticles using ionic liquid/metal sputtering. In: Journal of Materials Chemistry A. 2015 ; Vol. 3, No. 11. pp. 6177-6186.
@article{4a58a8f05a2c4c9fa0e8d1a68121a086,
title = "Ultrathin oxide shell coating of metal nanoparticles using ionic liquid/metal sputtering",
abstract = "The surface coating of metal nanoparticles resulting into core-shell structures is expected to improve the physicochemical properties of the nanoparticle cores without changing their size and shape. Here, we developed a novel strategy to coat Au, AuPd or Pt catalyst cores having average sizes smaller than 2.5 nm, which were pre-synthesized in ionic liquids by corresponding metal sputtering, with an extremely thin In2O3 layer (ca. <1.5 nm) by sputter deposition of indium in a room-temperature ionic liquid. The metal cores of Au or AuPd in core-shell particles exhibited superior stability against heat treatments or during electrocatalytic reactions compared to the corresponding bare metal particles. The In2O3 shell coating considerably enhanced the durability of electrocatalytically active Pt particles (1.2 nm). This sequential metal sputter deposition of different metals in ionic liquids will considerably contribute to the exploitation of key nanostructured components for next-generation energy-conversion systems.",
author = "Tsukasa Torimoto and Yasuhiro Ohta and Kazuki Enokida and Daisuke Sugioka and Tatsuya Kameyama and Takahisa Yamamoto and Tamaki Shibayama and Kazuki Yoshii and Tetsuya Tsuda and Susumu Kuwabata",
year = "2015",
month = "3",
day = "21",
doi = "10.1039/c4ta06643j",
language = "English",
volume = "3",
pages = "6177--6186",
journal = "Journal of Materials Chemistry A",
issn = "2050-7488",
publisher = "Royal Society of Chemistry",
number = "11",

}

TY - JOUR

T1 - Ultrathin oxide shell coating of metal nanoparticles using ionic liquid/metal sputtering

AU - Torimoto, Tsukasa

AU - Ohta, Yasuhiro

AU - Enokida, Kazuki

AU - Sugioka, Daisuke

AU - Kameyama, Tatsuya

AU - Yamamoto, Takahisa

AU - Shibayama, Tamaki

AU - Yoshii, Kazuki

AU - Tsuda, Tetsuya

AU - Kuwabata, Susumu

PY - 2015/3/21

Y1 - 2015/3/21

N2 - The surface coating of metal nanoparticles resulting into core-shell structures is expected to improve the physicochemical properties of the nanoparticle cores without changing their size and shape. Here, we developed a novel strategy to coat Au, AuPd or Pt catalyst cores having average sizes smaller than 2.5 nm, which were pre-synthesized in ionic liquids by corresponding metal sputtering, with an extremely thin In2O3 layer (ca. <1.5 nm) by sputter deposition of indium in a room-temperature ionic liquid. The metal cores of Au or AuPd in core-shell particles exhibited superior stability against heat treatments or during electrocatalytic reactions compared to the corresponding bare metal particles. The In2O3 shell coating considerably enhanced the durability of electrocatalytically active Pt particles (1.2 nm). This sequential metal sputter deposition of different metals in ionic liquids will considerably contribute to the exploitation of key nanostructured components for next-generation energy-conversion systems.

AB - The surface coating of metal nanoparticles resulting into core-shell structures is expected to improve the physicochemical properties of the nanoparticle cores without changing their size and shape. Here, we developed a novel strategy to coat Au, AuPd or Pt catalyst cores having average sizes smaller than 2.5 nm, which were pre-synthesized in ionic liquids by corresponding metal sputtering, with an extremely thin In2O3 layer (ca. <1.5 nm) by sputter deposition of indium in a room-temperature ionic liquid. The metal cores of Au or AuPd in core-shell particles exhibited superior stability against heat treatments or during electrocatalytic reactions compared to the corresponding bare metal particles. The In2O3 shell coating considerably enhanced the durability of electrocatalytically active Pt particles (1.2 nm). This sequential metal sputter deposition of different metals in ionic liquids will considerably contribute to the exploitation of key nanostructured components for next-generation energy-conversion systems.

UR - http://www.scopus.com/inward/record.url?scp=84924277770&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84924277770&partnerID=8YFLogxK

U2 - 10.1039/c4ta06643j

DO - 10.1039/c4ta06643j

M3 - Article

AN - SCOPUS:84924277770

VL - 3

SP - 6177

EP - 6186

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

SN - 2050-7488

IS - 11

ER -