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Iridium, Iridium-Nickel and Iridium-Copper catalysts were prepared by incipient wetness impregnation and evaluated in the aqueous-phase reforming of glycerol using La₂O₃ or CeO₂ as supports. The catalysts were characterized by N₂ physisorption, XRD, H₂-TPR, XPS, and EDS. The reactions were carried out in a fixed bed reactor feeding a solution of glycerol (10 wt %) in water, at 270 °C and 58 bar. All IrNi catalysts showed higher activity than Ir and IrCu, and in general, La₂O₃ catalysts showed a better performance when compared to CeO₂ catalysts. The highest hydrogen production yield was reached by bimetallic IrNi catalysts with over 250 µmol min^−1 g_cat^−1 for La₂O₃ and 150 µmol min^−1 g_cat^−1 for CeO₂.