Heteroatom Introduction and Electrochemical Reconstruction on Heterostructured Co‐Based Electrocatalysts for Hydrogenation of Quinolines

Small, Год журнала: 2025, Номер unknown

Опубликована: Март 13, 2025

Abstract Electrocatalytic hydrogenation (ECH) of quinoline provides an eco‐friendly and prospective route to achieve the highly value‐added generation 1,2,3,4‐tetrahydroquinoline (THQ). Co element has been proven be efficient catalytic site for ECH quinoline, but rational regulation electronic structure active improve activity is still a challenge. Herein, hierarchical core–shell consisting NiCo‐MOF nanosheets encapsulated Cu(OH) 2 nanorods (Cu(OH) @CoNi‐MOF) constructed. The heterojunction promotes transfer interfacial charge optimizes site. introduction Ni significantly increases binding between Cu, preventing exfoliation sites from core, reducing reaction energy barrier rate‐determining step, thus resulting in superior reactivity durability. Besides, electrochemical reconstruction further modulates by forming multi‐metallic compound with low valence state (NiCoCu), achieving optimal performance conversion 99.5% THQ selectivity 100%. A flow‐cell system assembled, demonstrating prospect industrial application.

Язык: Английский

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How an Anode‐Sided Gap Influences the Electrooxidation of Phenols in Flow Reactors

ChemElectroChem, Год журнала: 2025, Номер unknown

Опубликована: Март 21, 2025

Abstract Electroorganic synthesis offers a sustainable way to valorize chemical building blocks through renewable energy and environmentally friendly reagents. Substituted quinones, vital for manufacturing supplements, pharmaceuticals, pesticides, are typically derived from phenols via thermochemical oxidation with inorganic oxidizers specialized catalysts. Electrochemistry's ability omit such components highlights the appeal of electrifying this process. This study explores electrochemical 2,3,5‐trimethylphenol (TMP) into trimethyl‐1,4‐benzoquinone (TMQ) – crucial intermediate vitamin E production using zero‐gap electrolyzer. A TMQ yield 18 % selectivity 22 were achieved, improving 35 37 %, respectively, an anode‐sided spacer. We sought identify factors promoting formation in reactors gap, addressing limitations configurations investigating dependency on half‐cell potential, local reactant concentrations, pH, electrolyte convection. The results revealed that substrate concentration is interrelated convection most critical factor responsible gap‐related effect. 33 32 achieved continuous flow conditions electrolyzer at optimized conditions. These findings underscore role concentrations scaling synthetic reactions, providing robust framework tackling future challenges field.

Язык: Английский

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Driving Electrochemical Organic Hydrogenations on Metal Catalysts by Tailoring Hydrogen Surface Coverages

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Апрель 8, 2025

Electrochemical hydrogenation, powered by renewable electricity, represents a promising sustainable approach for organic synthesis and the valorization of biomass-derived chemicals. Traditional strategies often rely on alkaline conditions to mitigate competing hydrogen evolution reaction, posing challenges in sourcing atoms which can be addressed through localized water dissociation electrode surface. In this study, we present computationally guided design electrochemical hydrogenation catalysts optimizing coverage density binding strength electrode. Our theoretical investigations identify Cu, Au, Ag - metals with moderate as hydrogenations media. These predictions are experimentally validated using model substrate (acetophenone), achieving yields faradaic efficiencies up 90%. Additionally, nonprecious metal, is demonstrated selectively hydrogenate wide range unsaturated compounds, including C═O, C═C, C≡C, C≡N bonds, at low potentials excellent conversion rates chemoselectivities. This work highlights potential tailoring surfaces rationally metal electrocatalysts efficient hydrogenations. The insights gained here expected inform development more effective other industrially relevant chemical transformations.

Язык: Английский

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Alcohol and Carbonyl Redox Reactions in Electrochemical Organic Synthesis

ChemistryEurope, Год журнала: 2025, Номер unknown

Опубликована: Май 6, 2025

The primary aim of this review is to provide an overview relevant and efficient methods in organic electrosynthesis, presented a reader‐friendly format. focus on the electrochemical oxidation alcohols aldehydes carboxylic acids, secondary ketones. Additionally, corresponding reductions, such as reduction acids alcohols, ketones are also covered. For each type reaction, easy‐to‐follow table provides readers with essential information (e.g., substrates, working electrode, electrolyte, cell type, synthesis notes, references), enabling quick yet comprehensive electrosynthetic possibilities for given functional group. explores recent advancements encompassing both direct mediated techniques. As alternatives classical continue garner increasing attention, it hoped that will serve valuable resource those interested evaluating these synthetic approaches.

Язык: Английский

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Emerging nanoplatforms using molecular imprinted nanozymes for the detection of food hazards: Towards the future techniques of food safety assurance

Microchemical Journal, Год журнала: 2025, Номер unknown, С. 113986 - 113986

Опубликована: Май 1, 2025

Язык: Английский

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