文献类型：期刊文献

英文题名：Controlled Synthesis of Nanoscale Icosahedral Gold Particles at Room Temperature

作者：Chen, Lifang[1,3];Leong, G. Jeremy[2,3];Schulze, Maxwell[3];Dinh, Huyen N.[2];Pivovar, Bryan[2];Hu, Juncheng[4,5];Qi, Zhiwen[1];Fang, Yunjin[1];Prikhodko, Sergey[6];Pozuelo, Marta[6];Kodambaka, Suneel[6];Richards, Ryan M.[3]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Hydrogen Syst & Technol Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA;[3]Colorado Sch Mines, Dept Chem & Geochem, Golden, CO 80401 USA;[4]S Cent Univ Nationalities, Key Lab Catalysis & Mat Sci, State Ethn Affairs Commiss, Wuhan 430074, Peoples R China;[5]S Cent Univ Nationalities, Minist Educ, Wuhan 430074, Peoples R China;[6]Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90024 USA

年份：2012

卷号：4

期号：10

起止页码：1662

外文期刊名：CHEMCATCHEM

收录：;EI(收录号：20124015495772);WOS:【SCI-EXPANDED(收录号:WOS:000309396800024)】；

基金：This research is financially supported by National Natural Science Foundation of China (NSFC 21076074, 21006029 and 20803096), Shanghai Pujiang Talents Programme (10J1402400), Shanghai Scientific and Technological Commission (09DZ1120200), Shanghai Natural Science Foundation (10ZR1407200), the Programme of Introducing Talents of Discipline to Universities (111 Project, B08021), the Fundamental Research Funds for the Central Universities of China, Colorado School of Mines, the American Chemical Society Petroleum Research Foundation (Grant #48108-G10), and the National Renewable Energy Laboratory's Hydrogen Systems and Technologies Center.

语种：英文

外文关键词：gold; green chemistry; heterogeneous catalysis; nanostructure; surface analysis

摘要：The shape of nanocrystals determines surface atomic arrangement and coordination, influencing their chemical and physical properties. We present a novel and facile approach to synthesize gold icosahedra by employing glucose as reducing reagent and sodium dodecyl sulfate as directing agent in the environmentally benign medium of water at room temperature. The size of the icosahedra can be controlled in the range of 30250 nm by altering reaction conditions. High-resolution microscopy and diffraction studies indicate the icosahedra are composed of rotational twins that owe likely to assemblage of tetrahedral units. The gold icosahedra particles catalytic properties are probed in the borohydride reduction of p-nitrophenols and exhibit a size-dependence reaction property. Comparison studies with spherical particles prepared by the Turkevich method, coupled with poisoning experiments, infer that the shape has a strong influence in the abundance of active surface sites as well as their activities. The properties of nanoscale icosahedra particles has promising applications for further catalytic processes, surface enhancement spectroscopic methods, chemical or biological sensing, and the fabrication of nanoscale devices.