TY - JOUR
T1 - Chloride-free and water-soluble Au complex for preparation of supported small nanoparticles by impregnation method
AU - Murayama, Haruno
AU - Hasegawa, Takayuki
AU - Yamamoto, Yusuke
AU - Tone, Misaki
AU - Kimura, Moemi
AU - Ishida, Tamao
AU - Honma, Tetsuo
AU - Okumura, Mitsutaka
AU - Isogai, Atsuko
AU - Fujii, Tsutomu
AU - Tokunaga, Makoto
N1 - Publisher Copyright:
© 2017 Elsevier Inc.
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jcat.2017.07.002
DO - 10.1016/j.jcat.2017.07.002
M3 - Article
AN - SCOPUS:85026391756
SN - 0021-9517
VL - 353
SP - 74
EP - 80
JO - Journal of Catalysis
JF - Journal of Catalysis
ER -