Metal organic framework based catalysts for CO₂ conversion

Abstract

Metal organic frameworks (MOFs) are hybrid crystalline materials, exhibiting high specific surface areas, controllable pore sizes and surface chemistry.

Metal–Organic‐Framework‐Based Catalysts for Photoreduction of CO2

“…[69,73] Inorganic semiconductors absorb a photon with the energy equal to or higher than their band gap, resulting in that a negative electron (e − ) is excited from the valence band (VB) to the conduction band (CB) and simultaneously a positive hole (h + ) is left on the VB, implying that a charge-separated state is generated. [10,70] For photoactive MOFs, oxidation and reduction reactions should take place where photogenerated charges occur because of the limited charge mobility. [10,70] For photoactive MOFs, oxidation and reduction reactions should take place where photogenerated charges occur because of the limited charge mobility.…”

“…[10] The introduction of organic functional groups (e.g., OH, COOH, NH 2 ) into aromatic polycarboxylates can enhance the interactions between CO 2 molecules and these modified linkers. [10] The introduction of organic functional groups (e.g., OH, COOH, NH 2 ) into aromatic polycarboxylates can enhance the interactions between CO 2 molecules and these modified linkers.…”

“…[1,2] One promising solution is the development of CO 2 -capture technologies for geological sequestration in a physical manner. [5][6][7][8][9][10] By learning from photosynthesis in nature, researchers have devoted themselves to studies of the photocatalytic CO 2 reduction by directly using www.advmat.de www.advancedsciencenews.com [5][6][7][8][9][10] By learning from photosynthesis in nature, researchers have devoted themselves to studies of the photocatalytic CO 2 reduction by directly using www.advmat.de www.advancedsciencenews.com…”

“…[10,[60][61][62][63][64] Particularly, CPO-27-Mg (also called Mg 2 ((NH 2 ) 2 -BDC)) has exhibited the highest CO 2 capacities among the known MOF materials, which is up to 5.95 mol kg −1 at 298 K and 0.1 atm. [10] MOFs are composed of inorganic and organic components, which correspond to metal ions or clusters and organic linkers, respectively. [10] MOFs are composed of inorganic and organic components, which correspond to metal ions or clusters and organic linkers, respectively.…”

“…The high porosity of MOFs enables reactants to become close to the catalytic active sites, which are isolated by organic linkers. [10] Although a few reviews have been carried out from the perspective of CO 2 photoreduction according to the categories of photocatalytic products, [81] the intrinsic structural roles of the photocatalytic centers of photocatalysts [82] or the synthetic strategies for performance improvement, [72,83] no effort has been made based on pure MOF photocatalysts and various MOFbased composites. [75] Moreover, the high surface areas and uniform porous structures of MOFs provide the possibility of the incorporation of metal nanoparticles (acting as electron acceptors) into their frameworks, thus achieving a more efficient charge separation.…”