Supramolecular Polyaniline-Metal Ion as Chiral Nanozymes for Enantioselective Catalysis.

Understanding origin of asymmetric information encoded on chiral nanozymes is important in mediating enantioselective catalysis. Herein, the supramolecular chiral nanozymes constructed from P/M-polyaniline (P/M-PANI) nanotwists and metal ions (M , M = Cu, Ni, Co, and Zn) are designed through thioglycolic acid (TA) without chiral molecules to show the regulated catalytic efficiency and enantioselectivity. With combination of chiral environment from supramolecular scaffolds and catalytic center from metal ions, the P-PANI-TA-M as nanozymes show preference to 3,4-dihydroxy-S-phenylalanine (S-DOPA) oxidation while the M-PANI-TA-M show better selectivity to R-DOPA oxidation.

Dictating catalytic performance of platinum-iron nanoparticle by regulating its heterogeneous interface and stability.

Innovative design of nanocatalyst with high activity remains to be great challenge. Platinum (Pt) nanoparticle has already demonstrated to be excellent candidates in the field of catalysis. However, the scarcity and high price significantly hinder its large-scale production.

Dumbbell-like Pt-FeO Nanoparticles Encapsulated in N-Doped Carbon Hollow Nanospheres as a Novel Yolk@Shell Nanostructure toward High-Performance Nanocatalysis.

Noble metal-FeO dumbbell-like nanoparticles have aroused considerable attention because of their high potential as heterogeneous nanocatalysts. The designed synthesis of the advanced architecture of noble metal-FeO dumbbell-like nanoparticles with both improved catalytic activity and stability is still a challenge. Herein, through the combination of yolk@shell and dumbbell-like nanostructures, dumbbell-like Pt-FeO nanoparticles encapsulated in N-doped carbon hollow nanospheres (Pt-FeO@N-carbon) as a special yolk@shell nanostructure were developed.

Implantation of FeO Nanoparticles in Shells of Au@m-SiO Yolk@Shell Nanocatalysts with Both Improved Recyclability and Catalytic Activity.

Multifunctional nanocatalysts of Au@FeO/m-SiO yolk@shell hybrids had been developed through a template-assisted synthesis, where FeO nanoparticles (∼12 nm) and m-SiO shells were sequentially assembled on surfaces of Au/SiO core/shell templates, followed by selective etching of the inner SiO cores, leading to the formation of Au@FeO/m-SiO yolk@shell hybrids. The FeO nanoparticles were implanted in the inner surfaces of m-SiO shells with partially exposed surfaces to the inner cavity. The novel design not only ensures a high surface area (540.