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Three novel Co(II)-MOFs with a conjugated tetrabenzoic acid supported noble metal nanoparticles for efficient catalytic reduction of 4-nitrophenol.
- Source :
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Journal of Solid State Chemistry . Mar2022, Vol. 307, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
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Abstract
- The utilization of porous metal-organic frameworks (MOFs) as catalyst support has attracted intensive attentions in heterogeneous catalysis. However, the study of structure-activity relationship in this confined catalysis system is still scarce. Herein, three isostructural Co(II)-MOFs {Co 2 L(bpy)} n (CTGU-11), {Co 2 L(bpe)} n (CTGU-12) and {Co 2 L(bib)} n (CTGU-13) were synthesized by using 4,4′,4″,4‴-(1,3,6,8-Pyrenetetrayl)tetrabenzoic acid (H 4 L) as an organic ligand, and introducing three N-donor ligands (bpy = 4,4′-dipyridyl, bpe = 1,2-di(4-pyridyl)ethylene, bib = 1,4-bis(1-imidazoly)benzene) with different length. Among these Co(II)-MOFs, each L4− anion bridges four typical paddle wheel secondary building units (SBUs) to form a two dimensional (2D) sheet, which further expanded to the three-fold interpenetrated structure with the aid of different pillared ligands. Inspired by the eligible structure/surface feature of these frameworks, a series of Co-MOF-supported heterogeneous catalysts (NM@Co-MOFs, NM = Ag, Ru, Pd and Au) have been fabricated successfully via solution infiltration, for the reduction of 4-nitrophenol (4NP). Impressively, 2-Ru@Co-MOFs exhibit remarkable activity in comparison to other NM@Co-MOFs composites with the apparent rate constant reach 50.72 s-1 g-1, 26.14 s-1 g-1, and 22.79 s-1 g-1, respectively. Furthermore, the possible catalytic mechanism of 2-Ru@Co-MOFs has also been discussed based on the analysis of reaction kinetics. Three isostructural Co(II)-MOFs were synthesized by using a conjugated tetrabenzoic acid(H 4 L) as an organic ligand, and introducing three N-donor ligands with different length. Among these Co(II)-MOFs, each L4− anion bridges four typical paddle wheel secondary building units (SBUs) to form a two dimensional (2D) sheet, which further expanded to the three-fold interpenetrated structure with the aid of different pillared ligands. Inspired by the eligible structure/surface feature of these frameworks, a series of Co-MOF-supported heterogeneous catalysts (NM@Co-MOFs, NM = Ag, Ru, Pd and Au) have been fabricated successfully via solution infiltration, for the reduction of 4-nitrophenol. [Display omitted] • Three novel isostructural 3D Co(II)-MOFs have been prepared. • The integration metal nanoparticles into MOFs shows positive effect on reduction of 4-NP. • The electronic effects between noble metal and MOFs accelerate catalytic process. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00224596
- Volume :
- 307
- Database :
- Academic Search Index
- Journal :
- Journal of Solid State Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 154895111
- Full Text :
- https://doi.org/10.1016/j.jssc.2021.122867