The binary supports employed in this work were prepared by different methods. The Ti(7%)-MgO and the Ti(13%)-SiO 2 were obtained using the grafting technique. The La(27%)-SiO 2 was obtained through the incipient wetness impregnation with La(NO 3 ) 3 of Aerosil 300, previously calcined at 1173 K. The Rh was incorporated to these supports by wet impregnation. The catalysts were first evaluated for the CH 4 + CO 2 reaction in a fixed-bed reactor. They were found to be active and stable as to justify their use in the membrane reactor, which was operated at 823 K achieving methane conversions up to twice as much as the equilibrium values. In all cases, the activity of the Rh solids remained constant after 120 h on stream with very little formation of carbonaceous residues only detected through LRS. The catalysts were characterized through either hydrogen or carbon monoxide chemisorption, TPR, XRD, LRS and XPS. The Rh(0.6)/La-SiO 2 catalyst showed a high metal dispersion that remained constant after use and the highest capacity to restore the CH 4 + CO 2 equilibrium when H 2 was permeated out of the reaction section. The Rh(0.8)/Ti-MgO showed the highest Rh/oxide interaction associated with the lowest capacity to restore the reaction equilibrium. The Rh(0.8)/Ti-SiO 2 exhibited an intermediate activity due in part to the partial segregation of the TiO 2 upon calcinations and the subsequent appearance of small Rh8 crystallites in the used catalysts.