Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
J Am Chem Soc. 2009 Nov 18;131(45):16350-1. doi: 10.1021/ja907549n.
Elongated tetrahexahedral Au nanocrystals have been grown in high yields using a seed-mediated growth method. Morphological and structural characterizations show that these Au nanocrystals are single-crystalline and enclosed by 24 high-index {037} facets. They are more electrochemically active than octahedral Au nanocrystals that are enclosed by 8 low-index {111} facets. To date, there have been only a few reports of metal nanocrystals that are enclosed exclusively by high-index facets, including trisoctahedral Au nanocrystals enclosed by 24 {122} facets and tetrahexahedral Pt nanocrystals enclosed by 24 {037} facets. Our tetrahexahedral Au nanocrystals will be an important addition to the family of metal nanocrystals that are enclosed exclusively by high-index facets and will also be useful for fundamental catalytic studies on metal nanocrystals.
采用种子介导生长法高产率地制备了长四棱十二面体金纳米晶体。形态和结构特征表明，这些金纳米晶体是单晶的，由 24 个高指数{037}面封闭。它们比由 8 个低指数{111}面封闭的八面体金纳米晶体具有更高的电化学活性。迄今为止，仅有少数关于完全由高指数面封闭的金属纳米晶体的报道，包括由 24 个{122}面封闭的三角十二面体金纳米晶体和由 24 个{037}面封闭的四方六面体铂纳米晶体。我们的四方六面体金纳米晶体将是完全由高指数面封闭的金属纳米晶体家族的重要补充，也将有助于对金属纳米晶体的基础催化研究。
