Iron-based metal–organic frameworks and their derived materials for photocatalytic and photoelectrocatalytic reactions

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 499, P. 215538 - 215538

Published: Nov. 1, 2023

Language: Английский

---

A Dual-Purpose Ce(III)–Organic Framework with Amine Groups and Open Metal Sites: Third-Order Nonlinear Optical Activity and Catalytic CO₂ Fixation

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(31), P. 37300 - 37311

Published: July 27, 2023

The present work focuses on the synthesis and properties of a novel multifunctional cerium(III) MOF, [Ce2(data)3(DMF)4]·DMF (data2-: 2,5-diaminoterephthalate), abbreviated as NH2-Ce-MUM-2. Its crystal structure reveals an intricate 3D 4,5-connected framework with xah topology. This MOF features unique properties, such open metal sites, presence free amino groups, high stability. Two main applications NH2-Ce-MUM-2 were investigated: (i) heterogeneous catalyst in CO2 fixation into cyclic carbonates (ii) material third-order nonlinear optical activity. As model reaction, cycloaddition to propylene oxide give corresponding carbonate was explored under mild conditions, at atmospheric pressure carbon dioxide absence cocatalyst added solvent. Various reaction parameters investigated toward optimization exploration substrate scope, revealing up 99% product yields products. Besides, is highly stable, permitting its recyclability reusability further catalytic experiments. significant contributions groups sites within this particularly considered when proposing potential mechanism for reaction. Z-Scan measurements used evaluate (NLO) various laser intensities. A two-photon absorption (TPA) greater incident intensities shows that might be applicable switching devices. self-focusing effects highlighted by index refraction (n2). By reporting characterization along promising NLO behavior, current study introduces additional example growing family metal-organic frameworks.

Language: Английский

---

Design and Advanced Manufacturing of NU‐1000 Metal–Organic Frameworks with Future Perspectives for Environmental and Renewable Energy Applications

Small, Journal Year: 2023, Volume and Issue: 20(15)

Published: Nov. 23, 2023

Abstract Metal–organic frameworks (MOFs) represent a relatively new family of materials that attract lots attention thanks to their unique features such as hierarchical porosity, active metal centers, versatility linkers/metal nodes, and large surface area. Among the extended list MOFs, Zr‐based‐MOFs demonstrate comparably superior chemical thermal stabilities, making them ideal candidates for energy environmental applications. As Zr‐MOF, NU‐1000 is first synthesized at Northwestern University. A comprehensive review various approaches synthesis MOFs obtaining properties (e.g., diverse morphologies, area, particular pore size distribution) applications in catalysis (electro‐, photo‐catalysis), CO 2 reduction, batteries, hydrogen storage, gas storage/separation, other fields are presented. The further outlines current challenges development derivatives practical applications, revealing areas future investigation.

Language: Английский

---

Structure–property–performance relationship of vanadium- and manganese-based metal–organic frameworks and their derivatives for energy storage and conversion applications

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(19), P. 11149 - 11175

Published: Jan. 1, 2024

The current review discusses on vanadium- and manganese-based metal–organic frameworks their derivatives for energy storage conversion applications along with the potential future advancements in these fields.

Language: Английский

---

Water‐Stable Fluorous Metal–Organic Frameworks with Open Metal Sites and Amine Groups for Efficient Urea Electrocatalytic Oxidation

Small, Journal Year: 2023, Volume and Issue: 19(43)

Published: June 27, 2023

Urea oxidation reaction (UOR) is one of the promising alternative anodic reactions to water that has attracted extensive attention in green hydrogen production. The application specifically designed electrocatalysts capable declining energy consumption and environmental consequences major challenges this field. Therefore, goal achieve a resistant, low-cost, environmentally friendly electrocatalyst. Herein, water-stable fluorinated Cu(II) metalorganic framework (MOF) {[Cu2 (L)(H2 O)2 ]·(5DMF)(4H2 O)}n (Cu-FMOF-NH2 ; H4 L = 3,5-bis(2,4-dicarboxylic acid)-4-(trifluoromethyl)aniline) developed utilizing an angular tetracarboxylic acid ligand incorporates both trifluoromethyl (-CF3 ) amine (-NH2 groups. tailored structure Cu-FMOF-NH2 where linkers are connected by fluoride bridges surrounded dicopper nodes reveals 4,24T1 topology. When employed as electrocatalyst, requires only 1.31 V versus reversible electrode (RHE) deliver 10 mA cm-2 current density 1.0 m KOH with 0.33 urea electrolyte delivered even higher (50 at 1.47 RHE. This performance superior several reported catalysts including commercial RuO2 catalyst overpotential 1.52 investigation opens new opportunities develop utilize pristine MOFs potential electrocatalyst for various catalytic reactions.

Language: Английский

---

Visible Light-Driven Photocatalytic Degradation of Methylene Blue Dye Using a Highly Efficient Mg–Al LDH@g-C₃N₄@Ag₃PO₄ Nanocomposite

ACS Omega, Journal Year: 2024, Volume and Issue: 9(4), P. 4581 - 4593

Published: Jan. 22, 2024

The issue of water resource pollution resulting from the discharge dyes is a matter great concern for environment. In this investigation, new ternary heterogeneous Mg–Al LDH@g-C3N4X@Ag3PO4Y (X = wt % g-C3N4 with respect to layered double hydroxide (LDH) and Y Ag3PO4 loaded on LDH@g-C3N430) nanocomposite was prepared aim increasing charge carrier separation enhancement photocatalytic performance degrade methylene blue (MB) dye. samples were subjected characterization via Fourier-transform infrared spectroscopy, field emission scanning electron microscopy, energy-dispersive X-ray, transmission X-ray diffraction, UV–vis diffuse reflectance photoluminescence, photoelectrochemical analysis. It observed that in presence composite LDH g-C3N4, decomposition MB under 150 W mercury lamp illumination increases significantly as opposed alone, LDH@g-C3N4 level coating causes complete degradation occur less time. outcomes show LDH@g-C3N430@Ag3PO45 demonstrated highest photodegradation activity (99%). Scavenger tests showed two most effective agents are holes hydroxyl radicals, respectively. Finally, type II heterojunction mechanism by proposed.

Language: Английский

---

Compositional engineering of HKUST‐1/sulfidized NiMn‐LDH on functionalized MWCNTs as remarkable bifunctional electrocatalysts for water splitting

Carbon Energy, Journal Year: 2023, Volume and Issue: 5(12)

Published: Dec. 1, 2023

Abstract Water‐splitting reactions such as the hydrogen evolution reaction (HER) and oxygen (OER) typically require expensive noble metal‐based electrocatalysts. This has motivated researchers to develop novel, cost‐effective electrocatalytic systems. In this study, a new multicomponent nanocomposite was assembled by combining functionalized multiwalled carbon nanotubes, Cu‐based metal–organic framework (MOF) (HKUST‐1 or HK), sulfidized NiMn‐layered double hydroxide (NiMn‐S). The resulting nanocomposite, abbreviated MW/HK/NiMn‐S, features unique architecture, high porosity, numerous electroactive Cu/Ni/Mn sites, fast charge transfer, excellent structural stability, conductivity. At current density of 10 mA cm −2 , dual‐function electrocatalyst shows remarkable performance, with ultralow overpotential values 163 mV 73 (HER), well low Tafel slopes (57 75 dec −1 respectively). Additionally, its turnover frequency (4.43 s for OER; 3.96 HER) are significantly superior those standard Pt/C IrO 2 synergistic effect nanocomposite's different components is responsible enhanced performance. A functional theory study revealed that multi‐interface heterostructure contribute increased electrical conductivity decreased energy barrier, in HER/OER activity. presents novel vision designing advanced electrocatalysts performance water splitting. Various composites have been utilized water‐splitting applications. investigates use MW/HK/NiMn‐S splitting first time indicate between carbon‐based materials along layered compounds porous MOF. each component composite can be an interesting topic field

Language: Английский

---

MOFs coupled transition metals, graphene, and MXenes: Emerging electrocatalysts for hydrogen evolution reaction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 482, P. 148776 - 148776

Published: Jan. 18, 2024

Language: Английский

---

Metal-organic framework-based materials as key components in electrocatalytic oxidation and reduction reactions

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 87, P. 540 - 567

Published: Sept. 6, 2023

Language: Английский

---

Fluorinated Metal–Organic Frameworks with Dual-Functionalized Linkers to Enhance Photocatalytic H₂ Evolution and High Water Adsorption

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(45), P. 18680 - 18688

Published: Oct. 31, 2023

Photocatalytic H2 evolution has recently attracted much attention due to the reduction of nonrenewable energy sources and increasing demand for renewable sustainable energies. Meanwhile, metal-organic frameworks (MOFs) are emerging potential photocatalysts their structural adaptability, porous configuration, several active sites, a wide range performance. Nevertheless, there still limitations in photocatalytic reaction MOFs with higher charge recombination rates. Herein, copper-organic framework dual-functionalized linkers {[Cu2(L)(H2O)2]·(5DMF)(4H2O)}n (fluorinated MOF(Cu)-NH2; H4L = 3,5-bis(2,4-dicarboxylic acid)-4-(trifluoromethyl)aniline) rare 2-nodal 4,12-connected shp topology been synthesized by ligand-functionalization strategy evaluated production overcome this issue. According results, fluorinated MOF(Cu)-NH2 showed hydrogen rate 63.64 mmol·g-1·h-1 exposed light irradiation, indicating values 12 times that pure ligand when cocatalyst Pt photosensitizer Rhodamine B were present. In addition, MOF maximum water absorption 205 cm3·g-1. When introduced structure MOF, its visible-light increases considerably, which can be associated nearly narrower band gaps (2.18 eV). More importantly, contributes electron collection transport, acting as bridge helps separate transfer photogenerated charges while shortening migration path because functional group configuration. The current paper seeks shed on design advanced no calcination production.

Language: Английский

---