Infrared Reflection-Absorption Spectroscopy and STM Studies of Model Silica-Supported Copper Catalysts

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Science  30 Oct 1992:
Vol. 258, Issue 5083, pp. 788-790
DOI: 10.1126/science.258.5083.788


The structure of model silica-supported copper catalysts has been investigated with scanning tunneling microscopy (STM) and infrared reflection-absorption spectroscopy (IRAS). The IRAS studies of CO on the model silica-supported copper catalysts indicate that there are several types of copper clusters with surface structures similar to (111), (110), and other high-index planes of single-crystal copper. The STM studies show several types of copper clusters on silica and reveal images of metal clusters on an amorphous oxide support with atomic resolution.