Supported, single-atom, noble metal catalysts have received significant attention in recent years due to high catalytic activity and the cost effectiveness of atomic dispersions. Synthesis of these catalysts often involves harsh synthetic conditions and generates poor yields, which poses a significant obstacle to their adoption and usage in practical applications and scales. Further, lack of reproducible synthesis impedes fundamental scientific studies of charge transfer and metal anchoring. A facile synthesis method has been developed for the generation of single-atom decorated photocatalyst. Fe (III) doping in ultranano anatase TiO2 inhibits electron hole pair recombination and sequesters the photogenerated electron. Furthermore, Fe (III) provides an anchoring site for and stabilizes single-atom Pt and Pd dopants. CO-DRIFTS data indicate atomically dispersed Pt. A hybrid Pt-Fe-TiO2 photocatalyst exhibits significant rate enhancement compared to a control Fe-TiO2 for degradation of formaldehyde. Mass balance and nanoparticle sizing indicates that approximately 20% of the nanoparticles are decorated with single atom Pt.

Synthesis and characterization of single-atom Pt and Pd dopants on Fe-doped ultra-nano titanium dioxide nanoparticles

2019 Fall National Meeting

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