Environmental electron microscopy (ETEM) for catalysts with a closed E-cell with carbon windows
Environmental electron microscopy (ETEM) for catalysts with a closed E-cell with carbon windows
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DOI：
10.1016/j.ultramic.2006.01.006
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发表时间：
2006-04-01
期刊：
影响因子：
2.2
通讯作者：
Henry, CR
中科院分区：
文献类型：
--
作者：
Giorgio, S;Joao, SS;Henry, CR
在标准的高分辨率电子显微镜（Jeol 3010）中，由Jeol设计的环境样品保持器已用于在化学反应期间在催化剂的原子尺度上进行原位观察。实验已经在室温下在压力LIP至4毫巴的H-2和O-2中进行，并且在H-2的情况下，在各种温度下直到350 ℃。首次用窗口池环境电子显微镜（ETEM）系统观察到了负载在TiO_2和无定形碳上的Au和Pd团簇，获得了（111）点阵条纹的分辨率。Au团簇在H-2中被清洗，并在退火过程中得到了fee晶体的平衡形状。在O-2和H-2的连续处理过程中可以观察到相同的Au颗粒。对于Pd团簇在原位暴露于O-2，粘附力下降。(c)2006 Elsevier B. V.保留所有权利。
In a standard high-resolution electron microscope (Jeol 3010), an environmental sample holder designed by Jeol, has been used for in situ observations at the atomic scale of catalysts, during a chemical reaction. Experiments have been performed in H-2 and O-2 at a pressure LIP to 4 mbar at room temperature, and in the case of H-2, at various temperatures until 350 degrees C. For the first time, Au and Pd clusters supported on TiO2 and amorphous carbon have been observed with a windows-cell environmental electron microscopy (ETEM) system, with the resolution of the (111) lattice fringes. Au clusters have been cleaned in H-2 and have got the equilibrium shape of the fee crystals during annealing. The same Au particles can be observed during successive treatments under O-2 and H-2. For Pd clusters in situ exposed to O-2, the adhesion has decreased. (c) 2006 Elsevier B.V. All rights reserved.