Structure and Electronic Relations Between Molecular Clusters and Small Particles: An Essay to the Understanding of Very Dispersed Metals

摘要: Heterogeneous catalysis over supported metals requires, in general, the largest metallic surface for minimum content of metal itself. This implies that surface/volume ratio particles must be highest order to achieve efficiency catalyst. Consequently, researches done this field were mainly oriented produce more and dispersed catalysts. Progressively range particle size has been decreased from very large 1000 A about 100 finally down 10 below. As early as 1964 Rabo et al. [1] proposed now well accepted concept ‘atomic dispersion’ case zeolite platinum.