Abstract

Rhodium-copper “clusters” supported on Aerosil 200 were prepared from spectroscopically monitored solutions of anion precursors and from support which had been subjected to a severe heat treatment. Reaction of n-pentane and of neohexane in a hydrogen flow on 90 Rh:10 Cu and 50 Rh:50 Cu at 473–623 K was predominantly by hydrogenolysis with relatively minor amounts (5–10%) of isomerization. The αβ-type hydrogenolysis of neohexane (to neopentane and methane) was not decreased on copper incorporation relative to αγ and αγ′, hydrogenolysis routes which are believed to require single metal atom sites only. This result suggests the possibility of a single metal atom site mechanism for the “αβ” process.

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