Recent Advances in Reversible Liquid Organic Hydrogen Carrier Systems: From Hydrogen Carriers to Catalysts

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(37)

Published: Feb. 20, 2024

Abstract Liquid organic hydrogen carriers (LOHCs) have gained significant attention for large‐scale storage due to their remarkable gravimetric capacity (HSC) and compatibility with existing oil gas transportation networks long‐distance transport. However, the practical application of reversible LOHC systems has been constrained by intrinsic thermodynamic properties performances associated catalysts in (de)hydrogenation cycles. To overcome these challenges, thermodynamically favored carriers, high‐performance catalysts, catalytic procedures need be developed. Here, advances recent years summarized, primarily centered on regular catalyzed homogeneous heterogeneous including dehydrogenative aromatization cycloalkanes arenes N ‐heterocyclics ‐heteroarenes, as well reverse hydrogenation processes. Furthermore, development metal complexes coupling, a new family based alcohols is described that can release H 2 under relatively mild conditions. Finally, views next steps challenges field technology are provided, emphasizing resources low‐cost technologies, scenarios.

Language: Английский

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Modern Technologies of Hydrogen Production

Processes, Journal Year: 2022, Volume and Issue: 11(1), P. 56 - 56

Published: Dec. 26, 2022

Transitioning to energy-saving and renewable energy sources is impossible without accelerated development of hydrogen technologies. This review summarizes the state-of-the-art recent advances various production processes, including but not limited thermochemical electrolytic processes. Their opportunities limitations, operating conditions, catalysts are discussed. Nowadays, most still produced by steam reforming methane, its partial oxidation, or coal gasification. Considerable attention also paid natural gas pyrolysis. However, using these technologies has a lot impurities needs additional purification. A series for purification, filtration through palladium alloy membranes, membrane catalysis, allowing purification in one stage, The main way produce carbon-free water electrolysis low-cost from nuclear sources. Both conventional novel methods storage transportation, which an important part economy, reviewed. Biohydrogen Finally, prospects further work this field provided. will be useful researchers manufacturers working field.

Language: Английский

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Enhancing energy transfer through visible-light-driven polymerization in a metal–organic framework

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(34), P. 18236 - 18246

Published: Jan. 1, 2023

By utilizing an organic linker containing two photoactive groups, Zr-MOF with multiple photofunctionalities, such as photochromism, photo-induced structural transformation, and photo-catalysis, has been explored.

Language: Английский

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A Phosphine-Free Air-Stable Mn(II)-Catalyst for Sustainable Synthesis of Quinazolin-4(3H)-ones, Quinolines, and Quinoxalines in Water

The Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: 89(8), P. 5250 - 5265

Published: March 30, 2024

The synthesis, characterization, and catalytic application of a new phosphine-free, well-defined, water-soluble, air-stable Mn(II)-catalyst [Mn(L)(H2O)2Cl](Cl) ([1]Cl) featuring 1,10-phenanthroline based tridentate pincer ligand, 2-(1H-pyrazol-1-yl)-1,10-phenanthroline (L), in dehydrogenative functionalization alcohols to various N-heterocycles such as quinazolin-4(3H)-ones, quinolines, quinoxalines are reported here. A wide array multisubstituted quinazolin-4(3H)-ones were prepared water under air following two pathways via the coupling with 2-aminobenzamides 2-aminobenzonitriles, respectively. 2-Aminobenzyl alcohol ketones bearing active methylene group used partners for synthesizing quinoline derivatives, quinoxaline derivatives by vicinal diols 1,2-diamines. In all cases, reaction proceeded smoothly using our [1]Cl air, affording desired satisfactory yields starting from cheap readily accessible precursors. Gram-scale synthesis compounds indicates industrial relevance synthetic strategy. Control experiments performed understand unveil plausible mechanism.

Language: Английский

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A Perspective Review on N-Heterocycles as Liquid Organic Hydrogen Carriers and Their Hydrogenation/Dehydrogenation Catalysts

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(14), P. 12447 - 12471

Published: July 10, 2024

Language: Английский

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Biocatalytic and Chemo-Enzymatic Synthesis of Quinolines and 2-Quinolones by Monoamine Oxidase (MAO-N) and Horseradish Peroxidase (HRP) Biocatalysts

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(5), P. 3370 - 3378

Published: Feb. 22, 2023

The oxidative aromatization of aliphatic

Language: Английский

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Boosting dehydrogenation of dodecahydro-N-ethylcarbazole over Pd nanoclusters with tailored electronic structures loaded on nitrogen-doped carbon

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 65, P. 769 - 778

Published: April 10, 2024

Language: Английский

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Photodehydrogenation of Alcohols Catalysed by a Single Ruthenium N-Heterocyclic Carbene Complex

Published: Jan. 1, 2025

The transition metal catalyzed dehydrogenation of alcohols to carboxylate salts and H2 is an attractive tool due their potential use as LOHCs (Liquid Organic Hydrogen Carriers). Still, most current methods encompass harsh conditions two steps synthesis. Herein, we describe efficient ruthenium(II) hydrogen production from benzylic the corresponding benzyl carboxylates assisted by visible light. Our photocatalytic system comprises a standalone N-heterocyclic carbene based piano stool ruthenium complex playing dual role, harvesting visible-light enabling generation under mild in aqueous media.

Language: Английский

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Solvent- and Additive-Free Dehydrogenation of N-Heterocycles with Oxygen Catalyzed by Polyoxovanadate-Based Metal–Organic Frameworks

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(49), P. 20228 - 20235

Published: Nov. 21, 2023

N-heteroarenes are a family of organics with significant chemical and pharmaceutical applications. They generally prepared by the catalytic oxidative dehydrogenation (ODH) partially saturated N-heterocycles. In this work, we prepare demonstrate ODH applications two polyoxovanadate-based metal–organic frameworks general formula {[MII(bibp)1.5][VV2O6]}·H2O (M = Ni 1, Co 2; bibp 4,4′-bis(imidazol-1-ylmethyl)biphenyl). based on nonprecious metals, need no additives or organic solvents typically required for ODH, utilize molecular O2 as oxidant, thus possessing all traits desirable practical catalysis. Catalyst 1 shows tolerance range substrates different electronic steric features, including 2,3-dihydro-1H-indole tetrahydroquinolines substituted various functional groups. Mechanistic studies supported primarily evidence from electron paramagnetic resonance X-ray photoelectron spectra suggest that VV sites in catalytically responsible, first enabling formation substrate-based radical species single transfer event while being converted into its mixed-valence form, followed production superoxide anion (O2•–) upon contact O2. The reaction mixture containing O2•– initially formed then undergoes series steps, hydrogen abstraction hydroperoxyl radical, tautomerization dehydrogenated intermediate, finally repeating cycle aforementioned to achieve high-yield conversion corresponding N-heteroarenes.

Language: Английский

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Harnessing photocatalytic activity of mesoporous graphitic carbon nitride decorated by copper single-atom catalysts for oxidative dehydrogenation of N-heterocycles

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 676, P. 485 - 495

Published: July 9, 2024

Language: Английский

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