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This work aims at investigating the effect of the typeo fm etal (Pt, Pd, Rh, Ru, Cu, Ni, Co) on the performanceofZ rO 2 -supported catalystsf or the hydrodeoxygenation of phenol in the gas phase at 573 Ka nd 1atm. Twod ifferent reactionp athways take place depending on the typeo ft he metal. For Pt/ZrO 2 and Pd/ZrO 2 catalysts, phenol is mainly tautomerized,f ollowed by hydrogenation of the C=Cb ond of the tautomer intermediate formed, producing cyclohexanonea nd cyclohexanol.B y contrast, the directd ehydroxylation of phenol followed by hydrogenolysis might alsoo ccur over more oxophilic metalss uch as Rh,R u, Co, and Ni. In addition to the metals, the oxophilic sites of this support represented by Zr 4 + and Zr 3 + cations near the perimeter of the metal particles also increasedt he selectivity to deoxygenated products. All catalysts were significantly deactivated mainly owing to the growth of metal particle size and the decrease in the density of oxophilic sites.

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