First observation of dynamic shape changes of a gold nanoparticle catalyst under reaction gas environment by transmission electron microscopy
First observation of dynamic shape changes of a gold nanoparticle catalyst under reaction gas environment by transmission electron microscopy
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DOI：
10.1002/sia.2947
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发表时间：
2008-12
影响因子：
1.7
通讯作者：
Kouta Ueda;T. Kawasaki;H. Hasegawa;T. Tanji;M. Ichihashi
中科院分区：
文献类型：
--
作者：
Kouta Ueda;T. Kawasaki;H. Hasegawa;T. Tanji;M. Ichihashi
利用环境池透射电子显微镜（E-cell TEM）系统动态观察了催化金纳米粒子在CO氧化过程中的表面结构。在开发的系统中，金催化剂样品可以通过使用超薄碳膜将其与真空分离而设置在反应气体条件下。我们开发了一种能够产生8 nm厚的碳膜的方法，能够承受2 atm的气压。使用上述系统的原位观察表明，在反应期间金纳米颗粒催化剂的表面形状发生了显著变化。版权所有© 2008约翰威利父子有限公司。
The surface structure of catalytic gold nanoparticles was observed dynamically during CO oxidation using an environmental‐cell transmission electron microscope (E‐cell TEM) system. In the developed system, the gold catalyst specimen can be set under the reaction gas condition by separating it from the vacuum using ultra‐thin carbon films. We have developed a method capable of yielding for carbon films 8‐nm thick, capable of withstanding a gas pressure of 2 atm. In situ observations using the above system indicated marked changes in the surface shape of the gold nanoparticle catalyst during the reaction. Copyright © 2008 John Wiley & Sons, Ltd.