Using MPd nanoparticles as examples, I will demonstrate that MPd NP catalysis can be further enhanced by synergistic NP-support interactions to achieve green chemistry conversions and syntheses. Studying 2 nm AgPd NP catalysis, we found that coupling AgPd NPs with 40 × 5 nm WO2.72 nanorods (NRs) made AgPd NPs catalytically more active for dehydrogenation of formic acid (TOF = 1718 h-1 and Ea = 31 kJ/mol), and further for one-pot reactions of formic acid, 2-nitrophenol and aldehydes into benzoxazoles in near quantitative yields. When a monolayer of 3 nm NiPd NPs were assembled on nitrogen-doped graphene (NG), these monolayer assembled NPs show maximum NiPd catalysis for the hydrolysis of ammonia borane (H3NBH3, AB) with its TOF = 4896.8 h-1 and Ea = 18.8 kJ/mol, and for one-pot synthesis of quinazolines in quantitative yields. The NiPd/NG catalyst show even higher activity for hydrodehalogenation of halogenated aromatics under mild reaction conditions, reducing mono-, di-, or even ploy-halogenarenes to the corresponding dehalogenated arenes in &gt;90% yield in 10% aqueous isopropanol solvent. Our studies demonstrate a reliable way of tuning NP-support synergistic effects to enhance NP catalysis for important chemical conversions and synthetic applications.

Enhancing nanoparticle catalysis for chemical transformations

256th National Meeting (2018)

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