Synthesis and characterization of new Mg–O–F system and its application as catalytic support

• New heterogeneous catalytic systems are highlighted.
• MgF2–MgO, MgF2 and MgO as catalyst supports and iridium as an active phase
• Cheap and simple method to achieve MgF2–MgO system.
• A series of Ir supported magnesium oxo-fluoride catalysts were prepared.
• Iridium catalysts for hydrogenation reaction

The Mg–O–F system (MgF2–MgO) with different contents of MgF2 (100–0%) and MgO is tested as support of iridium catalysts in the hydrogenation of toluene as a function of the MgF2/MgO ratio. Mg–O–F samples have been prepared by the reaction of magnesium carbonate with hydrofluoric acid. The MgF2–MgO supports, after calcination at 500 °C, are classified as mesoporous of surface area (34–135 m2·g− 1) depending on the amount of MgO introduced. The Ir/Mg–O–F catalysts have been tested in the hydrogenation of toluene. The highest activity, expressed as TOF, min− 1, was obtained for the catalyst supported on Mg–O–F containing 75 mol%MgF2.

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