Two-Dimensional-on-Three-Dimensional Metal-Organic Frameworks for Photocatalytic H2 Production

Angew Chem Int Ed Engl. 2022 Oct 4;61(40):e202211031. doi: 10.1002/anie.202211031. Epub 2022 Aug 29.

Abstract

A MOF-on-MOF heterostructure is attractive in material science because of its potential combined effects in catalysis. However, precisely controlling the growth pattern at the metal-organic framework (MOF) nucleation stage to manipulate the metallic composition and structure dimensionality remain a challenge. Herein, we introduce a polyvinylpyrrolidone-assist kinetic-control strategy to achieve the "anti-epitaxial growth" pattern of a foreign MOF nucleus on the (111) facets of UiO-66-NH2 octahedron seeds, and construct diverse two-dimensional-on-three-dimensional (2D-on-3D) MOF heterostructures (2D-on-3D Cu, Zn, Cd, Co, and Ni). Notably, the 2D-on-3D Cu exhibits a unique "dimensionality-hybrid" effect in photocatalysis which led to a significant photoactivity enhancement over those of the traditional "dimensionality-identical" 2D, 3D and 3D-on-3D MOF structures.

Keywords: 2D-on-3D MOF; Anti-Epitaxial Growth; H2 Production; Photocatalysis; “Dimensionality-Hybrid” Effect.