This paper reports the possibility of associating Pd with another noble metal (rhodium) which is able to form a thermally stable oxide to extend toward higher temperatures the stability range of PdO. Bimetallic Pd-Rh/alumina catalysts were prepared and compared to reference Pd/alumina and Rh/alumina solids. The synthesis of the bimetallic catalysts was carried out by either co-impregnation or stepwise impregnation of alumina from solutions of RhCl3 and H2PdCl4. When submitted to TPO/TPD cycles, Pd-0.75 Rh-0.25/alumina catalysts obtained by the co-impregnation method exhibited oxidation and decomposition peaks at the same temperatures as those for reference Pd/alumina samples. The amounts of oxygen involved at each step were also comparable for the two solids and lower than the expected stoichiometric atomic ratio O/Pd = 1. Conversely, Pd-0.75 Rh-0.25/alumina catalysts obtained by the stepwise impregnation method exhibited improved stability of the PdO oxide, the maximal decomposition temperature being increased from 730 to 800 degreesC. In addition, the amounts of oxygen involved at each step were also increased and exceeded the value O/Pd = 1. As shown by TPR, Rh2O3 and PdO particles on the surface of catalysts obtained by the co-impregnation technique behave like the respective monometallic catalysts. When the catalyst was elaborated by stepwise impregnation, some Rh2O3 and PdO oxide particles were in strong interaction and were simultaneously reduced at room temperature in a H-2/He medium.