Sulfur atom-directed metal–ligand synergistic catalysis in zirconium/hafnium-oxo clusters for highly efficient amine oxidation

Science Bulletin, Journal Year: 2023, Volume and Issue: 69(4), P. 492 - 501

Published: Nov. 25, 2023

Language: Английский

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Optimizing the cask effect in multicomponent natural gas purification to provide high methane productivity

AIChE Journal, Journal Year: 2023, Volume and Issue: 70(3)

Published: Nov. 28, 2023

Abstract The efficient separation of CH 4 from natural gas containing C 2 H 6 and 3 8 impurities is an important topic. Previous work on the /C mixtures often focuses /CH selectivity, inadvertently sidelining critical importance selectivity. This oversight results in reduced CH₄ productivity compromised efficiency, a phenomenon termed as “cask effect.” Herein, we fine‐tune interrelationship between thermodynamics kinetics, targeting enhanced production. A synergistic thermodynamic–kinetic selectivity achieved using dynamic breakthrough experiments, underpinned by stable metal–organic framework TIFSIX‐Cu‐TPA. TIFSIX‐Cu‐TPA up to 5 mmol g −1 , surpassing most popular materials. Detailed density functional theory molecular dynamics computational insights reveal counteractive relationship, proving pivotal for simultaneous under optimal conditions. Moreover, precise adsorption sites are clearly determined through situ single‐crystal structures.

Language: Английский

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Defects Calculation and Accelerated Interfacial Charge Transfer in a Photoactive MOF‐Based Heterojunction

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Abstract Photocatalytic hydrogen production is currently considered a clean and sustainable route to meet the energy environmental issues. Among, heterojunction photocatalysts have been developed improve their photocatalytic efficiency. Defect engineering of attractive due it can perform as electron trap change band structure optimize interfacial separation rate photogenerated electron–hole pairs. Here, MOF‐based with theoretically high reduction oxidation abilities are successfully synthesized, denoted ZrO 2 /Pt/Zr‐MOF‐ X , tuned linker defectivity through an in situ electrochemical route. The rationally calculated from TG 1 H NMR results. A positive correlation found between activity, /Pt/Zr‐MOF‐6 optimized ca. 35% exhibits highest up 2923 µmol g −1 h illustrating importance structural defects photocatalysts. Ultrafast transient absorption spectroscopy spin resonance results unveil carrier concentration charge efficiency defected heterostructure direct Z‐scheme contact, leading its efficient photocatalysis redox power.

Language: Английский

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A Precise Preparation Strategy for 2D Nanoporous Thulium-Organic Framework: High Catalytic Performance in CO₂-Epoxide Cycloaddition and Knoevenagel Condensation

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 22, 2025

Efficient conversion of carbon dioxide (CO2) into high-value chemicals is viewed as one the most promising approaches for solving problem an energy shortage and serious environment pollution. However, design synthesis confined multifunctional catalysts with in situ engineered task-specific sites nanoporous environments remain a complex challenging task due to lack in-depth understanding their structure reaction mechanism. Herein, we report highly robust 2D framework {[Tm(HFPDC)(DMF)2]·DMF·H2O}n (NUC-120) (H4FPDC = 4,4′-(4-(4-fluorophenyl)pyridine-2,6-diyl)diisophthalic acid). The thermally activated host [Tm(HFPDC)]n (NUC-120a) has following two merits: (i) structure, (ii) massive quantity functional sites. Moreover, NUC-120 NUC-120a display high thermal chemical stability, which have been proved by TGA soaking experiments acid–base water organic solvents. Catalytic that NUC-120a, presence n-Bu4NBr cocatalyst could efficiently catalyze coupling CO2 epoxides under comparatively mild conditions. Furthermore, also displays catalytic performance Knoevenagel condensation reactions aldehydes malononitrile, should be because coexisting Lewis acidic basic can separately activate aldehyde malononitrile molecules. Thereby, this work further provides insight desired materials generated using existing suitable secondary building units (SBUs) meticulously regulating growth environments.

Language: Английский

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Boosting Solar Hydrogen Generation by Growth of UiO-based MOF on Metal Sulfide Surface

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116141 - 116141

Published: March 1, 2025

Language: Английский

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