Chloride-free and water-soluble Au complex for preparation of supported small nanoparticles by impregnation method

Haruno Murayama, Takayuki Hasegawa, Yusuke Yamamoto, Misaki Tone, Moemi Kimura, Tamao Ishida, Tetsuo Honma, Mitsutaka Okumura, Atsuko Isogai, Tsutomu Fujii, Makoto Tokunaga

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A novel simple and easy impregnation method for preparation of small gold (Au) nanoparticle (NP) catalysts (<3 nm) deposited on various supports including silica, which is difficult to be applied for conventional methods, has been developed. Chloride-free and water-soluble precursor, Au complexes coordinated with β-alanine, were successful for the preparing Au NPs, which exhibited an average diameter less than 3 nm. Thermal behavior of the Au complex was investigated by TG-DTA and in situ XAFS. XAFS analyses and DFT calculations revealed a molecular structure of the Au complex to be square-planar coordination structure and mononuclear complex of Au3+. Lower decomposition and reduction temperature of the chloride-free Au complex prevented Au atoms from aggregating and from following growth of Au particles. The prepared Au/SiO2 showed high selectivity for hydrogenation of 1-nitro-4-vinylbenzene into 1-ethyl-4-nitorobenzene and good performance for removal of unpalatable aroma by means of adsorption of polysulfide molecules.

Original languageEnglish
Pages (from-to)74-80
Number of pages7
JournalJournal of Catalysis
Volume353
DOIs
Publication statusPublished - Jan 1 2017

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Polysulfides
Catalyst supports
Discrete Fourier transforms
Impregnation
Differential thermal analysis
Molecular structure
Hydrogenation
Chlorides
Gold
chlorides
Silica
Nanoparticles
Decomposition
polysulfides
Adsorption
Atoms
nanoparticles
preparation
Catalysts
Molecules

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

Chloride-free and water-soluble Au complex for preparation of supported small nanoparticles by impregnation method. / Murayama, Haruno; Hasegawa, Takayuki; Yamamoto, Yusuke; Tone, Misaki; Kimura, Moemi; Ishida, Tamao; Honma, Tetsuo; Okumura, Mitsutaka; Isogai, Atsuko; Fujii, Tsutomu; Tokunaga, Makoto.

In: Journal of Catalysis, Vol. 353, 01.01.2017, p. 74-80.

Research output: Contribution to journalArticle

Murayama, H, Hasegawa, T, Yamamoto, Y, Tone, M, Kimura, M, Ishida, T, Honma, T, Okumura, M, Isogai, A, Fujii, T & Tokunaga, M 2017, 'Chloride-free and water-soluble Au complex for preparation of supported small nanoparticles by impregnation method', Journal of Catalysis, vol. 353, pp. 74-80. https://doi.org/10.1016/j.jcat.2017.07.002
Murayama, Haruno ; Hasegawa, Takayuki ; Yamamoto, Yusuke ; Tone, Misaki ; Kimura, Moemi ; Ishida, Tamao ; Honma, Tetsuo ; Okumura, Mitsutaka ; Isogai, Atsuko ; Fujii, Tsutomu ; Tokunaga, Makoto. / Chloride-free and water-soluble Au complex for preparation of supported small nanoparticles by impregnation method. In: Journal of Catalysis. 2017 ; Vol. 353. pp. 74-80.
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