Author/Authors :
Zimowska، نويسنده , , M. and Wagner، نويسنده , , J.B. and Dziedzic، نويسنده , , J. and Camra، نويسنده , , J. and Borz?cka-Prokop، نويسنده , , B. and Najbar، نويسنده , , M.، نويسنده ,
Abstract :
The aim of the Letter is to elucidate the nature of metal-support interaction in the 2 wt% Rh/Al2O3 catalyst obtained by annealing Rh–O–Al xerogel at 1113 K in air.
RTEM, and XRD results reveal that during the Rh–O–Al xerogel annealing in air, rhodium incorporates into forming alumina, which results mostly in Rh4+/δ-Al2O3 solid solution formation.
r, 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.
