Some aspects of metal-support strong interactions in Rh/Al2O3 catalyst under oxidising and reducing conditions

However, in the course of the catalyst reduction at 773 with H2 and at 823 K with CH4 the Rh4+/δ-Al2O3 solid solution transforms into Rh-Al alloy. The islands of rhodium form on the surface of the Rh-Al alloy nanocrystallites if the reduction is slow enough.