Metal–Organic-Framework-Based Nanoarrays for Oxygen Evolution Electrocatalysis

ACS Nano, Journal Year: 2023, Volume and Issue: 17(24), P. 24564 - 24592

Published: Dec. 4, 2023

The development of highly active and stable electrode materials for the oxygen evolution reaction (OER) is essential widespread application electrochemical energy conversion systems. In recent years, various metal–organic frameworks (MOFs) with self-supporting array structures have been extensively studied because their high porosity, abundant metal sites, flexible adjustable structures. This review provides an overview progress in design, preparation, applications MOF-based nanoarrays OER, beginning introduction architectural advantages characteristics MOFs. Subsequently, design principles robust efficient as OER electrodes are highlighted. Furthermore, detailed discussions focus on composition, structure, performance pristine MOF (MOFNAs) composite nanoarrays. On one hand, effects two components MOFs several modification methods discussed detail MOFNAs. other emphasizes use composed nanomaterials, such oxides, hydroxides, oxyhydroxides, chalcogenides, MOFs, nanoparticles, to guide rational electrodes. Finally, perspectives current challenges, opportunities, future directions this research field provided.

Language: Английский

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Functionalization of Magnetic UiO-66-NH₂ with a Chiral Cu(l-proline)₂ Complex as a Hybrid Asymmetric Catalyst for CO₂ Conversion into Cyclic Carbonates

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(13), P. 6051 - 6066

Published: March 19, 2024

In this study, a chiral [Cu(l-proline)2] complex-modified Fe3O4@SiO2@UiO-66-NH2(Zr) metal–organic framework [Fe3O4@SiO2@UiO-66-NH-Cu(l-proline)2] via multifunctionalization strategies was designed and synthesized. One simple approach to chiralize an achiral MOF-structure that cannot be directly chiralized using secondary agent like 4-hydroxy-l-proline. Therefore, catalyst synthesized with multistep method. Accordingly, Fe3O4@SiO2@UiO-66-NH2 has been Fe3O4 modification tetraethyl orthosilicate subsequently ZrCl4 2-aminoterephthalic acid. The presence of the silica layer helps stabilize core, while bonding between Zr4+ –OH groups in promotes development Zr-MOFs on surface, then surfaces magnetic MOFs composite are functionalized 1,2-dichloroethane Cu(II) complex 4-hydroxy-l-proline, afford magnetically nanocatalyst. Multiple techniques were employed characterize nanocatalyst such as Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM), transmission (TEM), energy-dispersive spectrometry (EDX), powder diffraction (PXRD), circular dichroism (CD), inductively coupled plasma (ICP), thermogravimetric analysis (TGA), vibrating-sample magnetometry (VSM), Brunauer–Emmett–Teller (BET) analyses. Moreover, shows asymmetric CO2 fixation reaction under solvent-free conditions at 80 °C ethanol reflux up 99 98% ee, respectively. Furthermore, mechanism illustrated concerning total energy reactant, intermediates product, structural parameters analyzed.

Language: Английский

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Molten Salt Derived MXenes: Synthesis and Applications

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: July 17, 2024

Abstract About one decade after the first report on MXenes, these 2D early transition metal carbides or nitrides have become among best‐performing materials in electrode applications related to electrical energy storage devices and power‐to‐fuels conversion. MXenes are obtained by a top‐down approach starting from appropriate 3D MAX phase that undergoes etching of A‐site metal. Initial procedures based use concentrated HF situ generation this highly corrosive poisonous reagent. Etching is major hurdles limiting progress field. The present review summarizes an alternative, universal, easily scalable procedure treating precursor with Lewis acid molten salt. starts presenting current state art salt obtain modify MXene, followed summary MXene samples. aim show versatility advantages terms general applicability, control surface terminal groups, uniform deposition nanoparticles, other features procedure.

Language: Английский

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Precise synthesis of dual atom sites for electrocatalysis

Nano Research, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 17, 2024

Language: Английский

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Modulator Directed Synthesis of Size-Tunable Mesoporous MOFs and Their Derived Nanocarbon-Based Electrocatalysts for Oxygen Reduction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150088 - 150088

Published: March 3, 2024

Language: Английский

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