A Facile Synthesis of Monodisperse Au Nanoparticles and Their Catalysis of CO Oxidation

A Facile Synthesis of Monodisperse Au Nanoparticles and Their Catalysis of CO Oxidation
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DOI:
10.1007/s12274-008-8026-3
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发表时间:
2008-09-01
期刊:
影响因子:
9.9
通讯作者:
Sun, Shouheng
Sun, Shouheng
中科院分区:
材料科学1区
文献类型:
--
作者:
Peng, Sheng;Lee, Youngmin;Sun, Shouheng

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在油胺存在下,将还原剂叔丁胺-硼烷络合物注入HAuCl(4)中心点3 H(2)O的1,2,3,4-四氢萘溶液中,通过Au的猝发成核反应,在室温下合成了单分散的Au纳米粒子。所合成的Au纳米颗粒显示出在520和530 nm之间的尺寸依赖的表面等离子体性质。它们呈二十面体形状,是具有多重孪晶结构的多晶。当沉积在石墨化多孔碳载体上时,NP对CO氧化具有高活性,在-45 ° C下显示100%CO转化率。
Monodisperse Au nanoparticles (NPs) have been synthesized at room temperature via a burst nucleation of Au upon injection of the reducing agent t-butylamine-borane complex into a 1, 2, 3, 4-tetrahydronaphthalene solution of HAuCl(4)center dot 3H(2)O in the presence of oleylamine. The as-synthesized Au NPs show size-dependent surface plasmonic properties between 520 and 530 nm. They adopt an icosahedral shape and are polycrystalline with multiple-twinned structures. When deposited on a graphitized porous carbon support, the NPs are highly active for CO oxidation, showing 100% CO conversion at -45 degrees C.