In-situ environmental (scanning) transmission electron microscopy of catalysts at the atomic level
In-situ environmental (scanning) transmission electron microscopy of catalysts at the atomic level
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DOI：
10.1088/1742-6596/522/1/012002
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发表时间：
2014-06
期刊：
影响因子：
--
通讯作者：
P. Gai;E. Boyes
中科院分区：
文献类型：
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作者：
P. Gai;E. Boyes
在受控的反应条件下观察固体催化剂表面上的反应单原子是理解和控制多相催化反应的关键目标。原位真实的时间畸变校正环境（扫描）透射电子显微镜（E（S）TEM）允许直接成像反应催化剂的动态表面和亚表面结构。本文介绍了化学工业中重要的氧化物催化剂和负载型金属纳米催化剂在受控反应环境下的原位交流ETEM和交流ETEM研究。它们为氧化物催化剂表面原子尺度上的动态过程和催化反应中的单原子动力学提供了直接证据。在受控反应环境中的单原子动力学的ESTEM研究表明，纳米粒子作为水库的广告原子。这些结果在催化和纳米粒子研究中具有重要意义。
Observing reacting single atoms on the solid catalyst surfaces under controlled reaction conditions is a key goal in understanding and controlling heterogeneous catalytic reactions. In-situ real time aberration corrected environmental (scanning) transmission electron microscopy (E(S)TEM permit the direct imaging of dynamic surface and sub-surface structures of reacting catalysts. In this paper in-situ AC ETEM and AC ESTEM studies under controlled reaction environments of oxide catalysts and supported metal nanocatalysts important in chemical industry are presented. They provide the direct evidence of dynamic processes at the oxide catalyst surface at the atomic scale and single atom dynamics in catalytic reactions. The ESTEM studies of single atom dynamics in controlled reaction environments show that nanoparticles act as reservoirs of ad-atoms. The results have important implications in catalysis and nanoparticle studies.