<br/>Atomically dispersed supported metal catalysts offer new prospects for efficient fuel processing and green chemicals production. Selective hydrogenation and dehydrogenation reactions, and selective oxidation reactions are being intensely investigated currently with the goal of identifying general trends in this new class of catalysts that will enable their development for practical applications. To date, single metal atoms stabilized on oxide supports or in host metal surfaces have been examined as potentially active and selective catalysts with the additional feature of better resistance to poisoning and structural destabilization. In this presentation, we will showcase these attributes for the class of Pt/Cu single atom alloy catalysts used for the selective activation of the C-H bond in low alkanes. Other examples will be drawn from the selective dehydrogenation of alcohols to aldehydes, and the oxidative coupling of methanol with aldehydes. In selective oxidation reactions, single-site, isolated Rh(I)(CO)<sub>2</sub>/ZSM-5 catalyze the direct oxidation of methane to methanol or acetic acid in the presence of molecular oxygen and carbon monoxide in aqueous solutions under mild pressures and temperatures. The Brønsted acidity of the support is crucial for the selective production of acetic acid. On the other hand, methanol formation does not require acid sites and can be realized on Na ion-exchanged ZSM-5, and even on an open oxide support. Thus, anchoring rhodium single ions on the appropriate solid support offers a catalytic system with product tunability between methanol and acetic acid. The above are only a few of the reaction systems that may benefit from harnessing the unique properties of single metal atom catalysts with the goal to improve chemical process efficiency.  <br/>

C-H bond activation by single metal atom catalysts under mild conditions

2019 Spring National Meeting

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