Noble Metal Nanoclusters Ru, Rh, Pd, Pt, Au on Alumina, Carbon and Silica

14 Noble Metal Nanoclusters (Ru, Rh, Pd, Pt, Au) on Alumina, Carbon and Silica 

Impregnation and reduction method can also be used to prepare noble metal nanoclusters. It was demonstrated that surface morphology, metal particle size and support material are important parameters on the catalytic activity of catalyst systems. Activation energies were 23,21 and 21 kJ mol for Ru, Rh and Pt catalyst on aliunina, respectively. Average particle sizes of Ru/Alumina, Rh/Alumina, Pd/Alumina, Pt/Alumina, Pt/C, Pt/SiO and Au/Alumina were 1.8, 2.5, 3.6, 1.5, 1.9, 5.1 and 2.6 nm, respectively. Moreover the BET surface areas were 40,41,37,38,239,396 and 35 m g [99]. Interestingly a very different hydrogen generation performance was reported. The time required to complete the hydrolysis reaction of ammonia borane was reported. Hence, several reaction times have been demonstrated for comparison piuposes. However, it is not possible to convert this data to conventional rate equations. 

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