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Issue 15, 2012
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Compositional control of AuPt nanoparticles synthesized in ionic liquids by the sputter deposition technique

Shushi Suzuki,*a  Toshimasa Suzuki,a  Yousuke Tomita,a  Masanori Hirano,a  Ken-ichi Okazaki,a  Susumu Kuwabatabc  and  Tsukasa Torimoto*ac 
Author affiliations

* Corresponding authors

a Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Japan
E-mail: shushi@apchem.nagoya-u.ac.jp, torimoto@apchem.nagoya-u.ac.jp
Fax: +81-52-789-5299
Tel: +81-52-789-2587

b Graduate School of Engineering, Osaka University, Suita, Japan

c Japan Science and Technology Agency, CREST, Kawaguchi, Japan

Abstract

Bimetallic alloy nanoparticles (NPs) are attractive materials for exploring advanced functions to reduce consumption of resources and energy. AuPt alloy NPs are of special interest for their potential applications to fuel cells, because of the reduction of CO poisoning on Pt. Here, we report the synthesis of AuPt alloy NPs by sputter deposition into (N,N,N-trimethyl-N-propylammonium bis(trifluoromethanesulfonyl) amide (TMPA-TFSA). Transmission electron microscopy (TEM), X-ray fluorescent spectroscopy (XRF) and X-ray diffraction (XRD) measurements showed that changes in particle diameters and compositions of AuPt bimetallic NPs, were controllable by choosing initial compositions of metal targets for the sputter deposition. By cyclic voltammetry measurements, the detection of an anodic peak corresponding to the methanol oxidation reaction on the AuPt NPs demonstrated the presence of an AuPt alloy phase in the NPs.

Graphical abstract: Compositional control of AuPt nanoparticles synthesized in ionic liquids by the sputter deposition technique

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Publication details

The article was received on 17 Feb 2012, accepted on 04 May 2012 and first published on 01 Jun 2012


Article type: Paper
DOI: 10.1039/C2CE25235J
Citation: CrystEngComm, 2012,14, 4922-4926
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    Compositional control of AuPt nanoparticles synthesized in ionic liquids by the sputter deposition technique

    S. Suzuki, T. Suzuki, Y. Tomita, M. Hirano, K. Okazaki, S. Kuwabata and T. Torimoto, CrystEngComm, 2012, 14, 4922
    DOI: 10.1039/C2CE25235J

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