Ruthenium-copper aggregates, unsupported

The surface properties of unsupported ruthenium-copper aggregates are considered in this chapter. In a subsequent chapter on bimetallic cluster catalysts, the properties of supported ruthenium-copper and osmium-copper catalysts are considered in detail. 

Recent work conducted in the laboratory of G. Ertl in Munich has extended the investigations on the ruthenium-copper system to include single crystal specimens (18-20). The results of the work are in excellent accord with those obtained in our laboratory on unsupported ruthenium-copper aggregates and on supported ruthenium-copper clusters as well. Our work on supported bimetallic clusters of ruthenium and copper is discussed in detail in the following chapter. 

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