Models in heterogeneous catalysis: Surface science quo vadis?
Models in heterogeneous catalysis: Surface science quo vadis?
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多相催化模型：表面科学现状如何？
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
G. Rupprechter
中科院分区：
文献类型：
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作者：
H. Freund;N. Ernst;T. Risse;H. Hamann;G. Rupprechter
模型催化剂系统已经通过在氧化铝和二氧化硅的有序氧化物薄膜上生长小金属聚集体来制备。这些系统通过扫描探针显微镜和透射电子显微镜进行结构和形态表征，并在一定程度上弥合了金属单晶研究和真实的催化剂样品研究之间的材料差距。最近，经典的表面科学技术应用于超真空条件下，已增加了非线性光学技术，如和频产生，这也可以在环境气体压力下应用。这样，在现实条件下，表面科学研究之间的压力差距可以被弥合。
Model catalyst systems have been prepared by growth of small metal aggregates on thin well ordered oxide films of alumina and silica. These systems lend themselves to structural and morphological characterization via scanning probe microscopies and transmission electron microscopy and bridge to a certain extent the materials gap between metal single crystal studies and the investigation of real catalyst samples. Recently, the classical surface science techniques applied under ultrahigh vacuum conditions have been augmented by non-linear optical techniques, such as sum frequency generation, which can also be applied under ambient gas pressures. Thus, the pressure gap between studies in surface science under realistic conditions can he bridged.