Fig. 1: Textural properties of prepared samples and the distribution of Ni clusters on zeolite supports.

(a) XRD patterns for the Ni/zeolites; (b) N2 adsorption/desorption isotherms of the Ni/zeolites; transmission electron microscopy (TEM) images of Ni/Y (c), Ni/MCM-22 (d), Ni/ITQ-2 (e) and Ni/ITQ-2-co (f). The corresponding size distributions of the Ni clusters were obtained by measuring over 300 Ni clusters.