Recent Advances in Covalent Organic Frameworks for Catalysis

Abstract

Covalent organic frameworks (COFs) as an emerging type of crystalline porousm aterials, have obtained considerable attention recently.T hey have exhibitedd iverse structure and attractive performance in variousc atalytic reactions. It is highly expected to have as ystematic and comprehensive review summing up COFs-derivedcatalysts in homogeneous and heterogeneous catalysis, which is favorable to the judicious design of an efficient catalystf or targeted reaction. Herein, we focus on summarizing recent and significant developments in COFs materials, with an emphasis on both the synthetic strategies andt argetedf unctionalization, and categorize it in accordance with the different types of catalytic reactions.T heir potential catalysis applications are reviewed thoroughly.M oreover,apersonal view aboutt he future developmento fC OFs catalysts with respect to the large-scale production is also discussed.[ + + ] These authors contributed equally to this work.The ORCID identification number(s) for the author(s) of this articlecan be found under: https://doi.

Ultrastable and Highly Catalytically Active N‐Heterocyclic‐Carbene‐Stabilized Gold Nanoparticles in Confined Spaces

“…[3][4][5] Tu ning of the surface-decorating ligands of MNPs is now well established as ap owerful strategy to modulate their surface electronic and functional features,leading to enhanced catalytic activities. [6,7] Over the past decade,c ontrol over the size,s hape, distribution and catalytic tuning of MNPs has advanced through the use of porous templates,s uch as metal-organic frameworks (MOFs), [8][9][10][11][12][13][14] covalent organic frameworks (COFs), [15][16][17][18] and porous coordination cages. [19][20][21][22] Of this wide variety of materials,d iscrete three-dimensional (3D) organic molecular cages with guest accessible cavities have recently emerged as an ew type of functional-materials platform to prepare MNPs with precisely controlled sizes and shapes.…”

Recent Advances in the Preparation and Applications of Organo‐functionalized Porous Materials

“…These materials possess remarkably thermal high surface areas and thermal stabilities which make them good candidates for several applications including gas capture . The COFs can be classified into 2D and 3D forms with the former consisting of atomic layers stacked using π‐π interactions and the latter possess building blocks that are connected via covalent bonds . The structure of COFs can be suitably manipulated as per the requirement of the application.…”

Recent Advances in Noble‐Metal‐Free Catalysts for Electrocatalytic Synthesis of Ammonia under Ambient Conditions

“…[86] In the past ten years, heteroatomdoped carbon dots, carbon nanotubes, graphene, and graphite, have attracted widespread attention as efficient metal-free catalysts for advanced energy conversion including oxygen reactions, HER, CO 2 RR, as well as NRR. [87,88] Carbon-based materials formed by strong covalent bonds between carbon atoms are ideal for designing high-performance NRR electrocatalysts due to their many unique physical and chemical properties, including high surface area, excellent electrical conductivity, controllable porosity, as well as abundant defects. [89] Recently, heteroatom (e. g., B, N, O, P, and S) doped carbon materials [90] have become a research focus as metal-free electrocatalysts due to their good electrochemical stability and high electronic conductivity.…”

“…With these advantages, single atom catalysts (SACs) have been exploited for the electrocatalytic NRR process and are expected to break up the stable N � N covalent triple bond with extremely high bond energy. [125] Based on DFT (Density functional theory), several single atom catalysts such as Mo 1 (Cr 1 ), [126] Cr, [127] W, [128] and Mo@BCN [129] are predicted as potential NRR electrocatalysts with high NH 3 yield rate and high Faradaic efficiency. However, these SACs are rarely reported in practice.…”