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A New Strategy in Heterogeneous Catalysis: The Design of Cortex Catalysts

1996; Wiley; Volume: 34; Issue: 23-24 Linguagem: Inglês

10.1002/anie.199527281

1521-3773

Manfred T. Reetz, Stefan A. Quaiser, Rolf Breinbauer, B. Tesche,

Surface Chemistry and Catalysis

Without appreciable migration into the pores of the support (Al2O3), preformed and size-selectively synthesized metal clusters (e.g. Pd or Ni) and bimetal clusters (e.g. Pt/Sn) stabilized by ammonium salts can be placed specifically on the outer surface and immobilized (see schematic representation on the right; black: metal cluster, gray: support particles). Initial experiments indicate that such cortex catalysts show increased activities in hydrogenation reactions.