Gold Aerogels: Three-Dimensional Assembly of Nanoparticles and Their Use as Electrocatalytic Interfaces
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- 作者：Dan Wen ; Wei Liu ; Danny Haubold ; Chengzhou Zhu ; Martin Oschatz ; Matthias Holzschuh ; André Wolf ; Frank Simon ; Stefan Kaskel ; Alexander Eychmüller
- 刊名：ACS Nano
- 出版年：2016
- 出版时间：February 23, 2016
- 年：2016
- 卷：10
- 期：2
- 页码：2559-2567
- 全文大小：545K
- ISSN：1936-086X
文摘
Three-dimensional (3D) porous metal nanostructures have been a long sought-after class of materials due to their collective properties and widespread applications. In this study, we report on a facile and versatile strategy for the formation of Au hydrogel networks involving the dopamine-induced 3D assembly of Au nanoparticles. Following supercritical drying, the resulting Au aerogels exhibit high surface areas and porosity. They are all composed of porous nanowire networks reflecting in their diameters those of the original particles (5–6 nm) via electron microscopy. Furthermore, electrocatalytic tests were carried out in the oxidation of some small molecules with Au aerogels tailored by different functional groups. The beta-cyclodextrin-modified Au aerogel, with a host–guest effect, represents a unique class of porous metal materials of considerable interest and promising applications for electrocatalysis.