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

被引：19

作者：

Murayama, Haruno ^{[1
]}

Hasegawa, Takayuki ^{[1
]}

Yamamoto, Yusuke ^{[1
]}

Tone, Misaki ^{[1
]}

Kimura, Moemi ^{[1
]}

Ishida, Tamao ^{[2
]}

Honma, Tetsuo ^{[3
]}

Okumura, Mitsutaka ^{[4
]}

Isogai, Atsuko ^{[5
]}

Fujii, Tsutomu ^{[5
]}

Tokunaga, Makoto ^{[1
]}

机构：

[1] Kyushu Univ, Dept Chem, Nishi Ku, Fukuoka 8190395, Japan

[2] Tokyo Metropolitan Univ, Res Ctr Gold Chem, Grad Sch Urban Environm Sci, Hachioji, Tokyo 1920397, Japan

[3] Spring 8, Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

[4] Osaka Univ, Dept Chem, Toyonaka, Osaka 5600043, Japan

[5] Natl Res Inst Brewing, Higashihiroshima, Hiroshima 7390046, Japan

来源：

JOURNAL OF CATALYSIS | 2017年 / 353卷

关键词：

Gold catalysts; Supported gold; Silica; Impregnation; Chloride-free Au complex; LOW-TEMPERATURE OXIDATION; GOLD NANOPARTICLES; DIMETHYL TRISULFIDE; AU/TIO2; CATALYSTS; DFT CALCULATIONS; TIO2; CO; HYDROGENATION; DEPOSITION; MECHANISM;

D O I：

10.1016/j.jcat.2017.07.002

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 beta-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. (C) 2017 Elsevier Inc. All rights reserved.

引用

页码：74 / 80

页数：7

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