Transient pulsed discharge preparation of graphene aerogel supports asymmetric Cu cluster catalysts promote CO2 electroreduction

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 31, 2025

Designing asymmetrical structures is an effective strategy to optimize metallic catalysts for electrochemical carbon dioxide reduction reactions. Herein, we demonstrate a transient pulsed discharge method instantaneously constructing graphene-aerogel supports asymmetric copper nanocluster catalysts. This process induces the convergence of atoms decomposed by chloride onto graphene originating from intense current pulse and high temperature. The exhibit atomic electronic due lattice distortion oxygen doping clusters. In reaction, selectivity activity ethanol production are enhanced structure abundance active sites on catalysts, achieving Faradaic efficiency 75.3% 90.5% multicarbon products at −1.1 V vs. reversible hydrogen electrode. Moreover, strong interactions between nanoclusters support confer notable long-term stability. We elucidate key reaction intermediates mechanisms Cu4O-Cu/C2O1 moieties through in situ testing density functional theory calculations. study provides innovative approach balancing stability asymmetric-structure energy conversion. Asymmetric show promise CO2 catalytic reduction. Here, authors develop prepare graphene-aerogel-supported Cu that enhance conversion into products.

Language: Английский

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Imine-linked covalent organic frameworks with coordinated Co single atoms for efficient Fenton-like catalysis to degrade sulfamethoxazole

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115749 - 115749

Published: Feb. 1, 2025

Language: Английский

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Structural Regulation Strategies of Atomic Cobalt Catalysts for Oxygen Electrocatalysis

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Abstract Oxygen electrocatalysis is a core reaction in renewable energy devices, greatly promoting the transformation and upgrading of structure. Nonetheless, performance conversion devices hindered by large overpotential slow kinetics oxygen electrocatalytic reactions. Recently, single‐atom catalysts (SACs) have emerged as promising contenders field because their exceptional metal atom utilization, distinctive coordination environment, adjustable electronic properties. This review presents latest advancements design Co‐based SACs for electrocatalysis. First, OER ORR mechanisms are introduced. Subsequently, strategies regulating structure summarized three aspects, including centers, support carriers. A particular emphasis given to relationship between properties catalysts. Afterward, applications explored. Ultimately, challenges prospects prospected.

Language: Английский

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Preparation of Fe, Co, Ni-based single atom catalysts and the progress of their application in electrocatalysis

Microstructures, Journal Year: 2025, Volume and Issue: 5(1)

Published: Jan. 8, 2025

Single-atom catalysts (SACs) have garnered considerable attention owing to their profound potential in promoting the efficient utilization of metal resources and attaining atomic-level economy. Fe, Co, Ni SACs demonstrated broad application prospects electrocatalysis due tunable composition structure, as well unique electronic properties. Firstly, various preparation methods for are outlined this review, including high-temperature pyrolysis, impregnation, chemical vapor deposition, atomic layer deposition. These not only enhance efficiency atoms but also ensure stability catalysts. Subsequently, review summarizes recent progress applications electrocatalysis, with a particular focus on efficacy hydrogen evolution reaction, oxygen reduction carbon dioxide nitrogen reaction. Despite remarkable advancements, still face challenges related large-scale production, enhancement, comprehensive characterization, mechanistic exploration. Finally, discusses these proposes strategies address them order fully realize high-performance

Language: Английский

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Microenvironment Modulation of Carbon-Based Single-Atom Catalysts for Advanced Oxidation Processes

Environmental Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Highly levels of atomically dispersed Ru atom on CeO2 from defects designing for promoted catalytic oxidation of chlorobenzene

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 131936 - 131936

Published: Feb. 1, 2025

Language: Английский

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Recent progress of direct ammonia fuel cells: from materials to transportation applications

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Language: Английский

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SERS/Fluorescence Dual-Modal Imaging Bioprobe for Accurate Diagnosis of Breast Cancer

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

Published: March 2, 2025

Early diagnosis and precise identification of breast cancer subtypes are vital. However, current detection methods often hindered by high costs complexity. This study aims to develop an efficient noninvasive method realize detection. First, hexoctahedral gold nanoparticles (Au HNPs) constructed, which detect molecules with concentrations as low 10–12 M, the EF value is ∼3.8 × 108. Then, two optical bioprobes a surface-enhanced Raman scattering (SERS)-fluorescence (FL) dual-modal function for cell subtype designed. These exhibit excellent SERS stability since spectral relative standard deviation (RSD) SERS-FL bioprobe achieves good level ∼10.4%. Additionally, clear distinction between cells white blood (WBCs) under fluorescence microscope showed that have imaging ability. More importantly, creatively stitching spectra bioprobes, "symphonic spectra" linear discriminant analysis (LDA) machine learning algorithm employed, enabling high-precision classification accuracy 94%. proposes innovative strategy combined FL technology, provides possibility rapid accurate subtypes.

Language: Английский

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Progress of supported Pt-based catalysts for electrochemical methanol energy conversion

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 534, P. 216603 - 216603

Published: March 7, 2025

Language: Английский

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Atomically Dispersed Ru on NiFeV Layered Triple Hydroxides for Enhanced Water Oxidation

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Abstract NiFe‐based (oxy)hydroxides are widely recognized as highly promising electrocatalysts for the alkaline oxygen evolution reaction (OER). Despite their potential, low conductivity and sluggish charge transfer kinetics pose significant challenges to further enhancing catalytic activity. Herein, a novel catalyst featuring Ru single‐atoms (SAs) coordinately dispersed on nickel‐iron vanadium layered triple hydroxides (Ru SAs@NiFeV‐LTHs) improve OER performance is reported. With loading of 0.33 wt.%, this demonstrates outstanding performance, with Tafel slope 27.15 mV dec −1 minimal overpotentials 221 269 achieve current densities 10 100 mA cm −2 , respectively, outperforming unmodified NiFeV‐LTHs most other reported in literature. Furthermore, exhibits exceptional durability, maintaining stable 200 hours at 500 . Density functional theory (DFT) calculations, coupled experimental observations, identify presence SAs key factor, which not only serve superior active sites but also modifiers electronic properties support material, thereby improving overall intrinsic activity metal catalyst's support.

Language: Английский

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