Nanoconfinement‐Controlled Synthesis of Highly Active, Multinary Nanoplatelet Catalysts from Lamellar Magic‐Sized Nanocluster Templates. (5th September 2021)

• Record Type: Journal Article
• Authors: Baek, Woonhyuk; Bootharaju, Megalamane S.; Lorenz, Severin; Lee, Sanghwa; Stolte, Sven; Fainblat, Rachel; Bacher, Gerd; Hyeon, Taeghwan
• Is Part Of: Advanced functional materials. Volume 31:Number 49(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-09-05
• Subjects: catalysis -- diffusion‐limited morphology control -- magic‐sized semiconductor nanoclusters -- multi‐elemental doping -- synergistic effects; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202107447
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Magic‐sized semiconductor nanoclusters (MSCs) possessing intermediate stability are promising precursors for synthesizing low‐dimensional nanostructures that cannot be achieved by direct methods. However, uncontrolled diffusion of MSCs in their colloidal‐state poses challenges in utilizing them as precursors and/or templates for the controlled synthesis of nanomaterials. Herein, a nanoconfined diffusion‐limited strategy to synthesize large CdSe nanoplatelets through the solid‐state transformation of (CdSe)13 MSCs is designed, wherein MSCs serve as both precursors and lamellar bilayer templates. In sharp contrast, in the colloidal‐state, these MSCs are grown to CdSe nanoribbons or nanorods. Furthermore, the nanoconfined route is used not only to transform (CdSe)13, Mn 2+ :(CdSe)13, and Mn 2+ :(Cd1− x Zn x Se)13 MSCs but also to dope Cu +, producing Cu + :CdSe, Mn 2+ /Cu + :CdSe, Mn 2+ /Cu + :Cd1− x Zn x Se nanoplatelets, respectively. The resulting multinary nanoplatelets with controlled compositions exhibit unique optical and magneto‐optical properties through characteristic exciton transfer mechanisms. Furthermore, synergistic effects have made quinary Mn 2+ /Cu + :Cd0.5 Zn0.5 Se nanoplatelets efficient and reusable catalysts for chemical fixation of CO2 with epoxide (turnover frequency: ≈200/h) under mild conditions. This nanoconfined synthetic strategy paves the way to synthesize diverse shape‐controlled multi‐component nanostructures for optoelectronic and other catalytic applications. Abstract : The nanoconfinement in the lamellar, amine ligated (CdSe)13 clusters enables their transformation to CdSe nanoplatelets through a solid‐state annealing process. The controlled reactivity of these clusters results in successful Cu + doping. Remarkably, the nanoconfinement method produces multinary Mn 2+ /Cu + :Cd1− x Zn x Se nanoplatelets with unique optical and enhanced catalytic properties.