Novel and innovative sustainable HNFM@FeCl4 DES as an electrolyte, solvent, and catalyst for rapid electro-organic synthesis of spirooxindole and 4H-pyran derivatives with cytotoxicity assessment

Research on Chemical Intermediates, Год журнала: 2025, Номер unknown

Опубликована: Март 29, 2025

Язык: Английский

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Visualizing Electrochemical CO₂ Reduction Reaction: Recent Progress of In Situ Liquid Cell Transmission Electron Microscopy

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 7, 2025

Abstract The electrochemical carbon dioxide reduction reaction (CO 2 RR), driven by renewable energy, represents a promising approach for converting CO into valuable fuels and chemicals, addressing pressing energy environmental challenges. However, the development of high‐performance RR electrocatalysts remains constrained limited understanding their dynamic evolution mechanisms, intrinsic stability factors, activity origins under operational conditions. Transmission electron microscopy (TEM), with its unparalleled spatial resolution at nanoscale atomic level, combined microregional analytical capabilities, has become vital tool investigating heterogeneous electrocatalysis. Among these techniques, in situ liquid cell TEM (LC‐TEM) enables real‐time visualization structural morphological changes catalysts during RR. This review critically examines recent advancements LC‐TEM applications RR, focusing on three key aspects electrocatalysts: morphology, transformation phase structure, identification active sites. It highlights pivotal role elucidating structure–activity relationships activation deactivation mechanisms electrocatalysts. Moreover, discusses primary challenges facing outlines future directions advancing electrolysis research.

Язык: Английский

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The Evolution of Hexagonal Cobalt Nanosheets for CO2 Electrochemical Reduction Reaction

Catalysts, Год журнала: 2023, Номер 13(10), С. 1384 - 1384

Опубликована: Окт. 21, 2023

The CO2 electrochemical reduction reaction (CO2RR) is one of the most promising methods to reduce carbon dioxide emissions and store energy. At same time, pathways are diverse products abundant. Converting C2+ products, a critical feedstock, requires C–C coupling step with transfer more than 10 electrons per molecule and, hence, kinetically sluggish. production some key adsorptions conducive formation products. In this work, we used in situ techniques figure out reason why hexagonal-close-packed (hcp) Co nanosheets (NSs) have high activity CO2RR ethanal. According Raman spectra, local pH environment on catalyst surface favorable for CO2RR. at low potentials not only suppresses competing hydrogen evolution but also stimulates COCO* intermediate. isotopic labeling experiment differential mass spectrometry (DEMS) provides possible sequence 13CO generated when replace 12CO2 13CO2, which identifies origin Besides, impedance spectroscopy (EIS) shows that hcp −0.4 V vs. RHE boosts H2O dissociation proton transfer, feeding sufficient H* *COOH. end, by analyzing transmission electronic microscopy (TEM), find (002) plane may be beneficial conversion adsorption intermediates.

Язык: Английский

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Advances and Challenges of Carbon‐Free Gas‐Diffusion Electrodes (GDEs) for Electrochemical CO₂ Reduction

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 26, 2024

Abstract Electrochemical CO 2 reduction reaction (CO RR) coupled with renewable electricity holds promises for efficient mitigation of carbon emission impacts on the environment and turning into valuable chemicals. One important task in RR development is design fabrication electrodes stable operation long term. Gas‐diffusion (GDEs) have been employed to continuously feed electrolyzers. Despite significant advances GDE tailoring properties, present GDEs often suffer from critical issue flooding due electrowetting carbon‐based substrates, which hinders transition industrial application. To address flooding, intrinsically hydrophobic polymeric substrates recently fabricated shown promising performances. Herein, challenges associated carbon‐free are reviewed RR. This review first briefly outlines electrolyzers basics. Through discussion around shortcomings conventional GDEs, most recent efforts resolve summarized. Subsequently, advances, advantages, elaborated. Finally, priorities future studies suggested, aim support advancement scale‐up extend them other electrochemical systems where gas electrolyte contact.

Язык: Английский

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Catalysis for Carbon‐Circularity: Emerging Concepts and Role of Inorganic Chemistry

ChemSusChem, Год журнала: 2024, Номер 17(21)

Опубликована: Май 28, 2024

Carbon circularity is crucial for achieving a circular economy but has wider implications and impacts with respect to the of materials. It an in-depth transformative effect on economy. CO

Язык: Английский

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