Using Immobilized Ru Hydride Complexes to Understand the Interaction of Molecular Heterogeneous Catalysts with the Pore Walls under Catalytic Conditions (C07*)

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Molecular heterogeneous catalysts (B1-3) often suffer from low activity and deactivation due to surface collapse (interaction with the pore wall). Here, we present a method for detecting surface collapse under catalytic conditions. We will immobilize ruthenium complexes inside of Lewis acidic mesoporous materials (A4-6). Since Lewis acids change the selectivity of ruthenium hydride catalysts in CO2 hydrogenation, the product distribution is a direct probe of the amount of surface collapse (when the complex is close to the Lewis acids). This will be corroborated through the use of advanced spectroscopies (C1 and S1).