Hydrothermal synthesis of CuWO4/Co3O4 nanocomposites for water remediation and antibacterial activity applications

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Efficient Cu–Zn–Al/LDH Catalysts for CO₂-to-Methanol Conversion

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Янв. 28, 2025

Язык: Английский

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Promotional Effect of ZnO and ZrO₂ in K-Doped Fe Catalysts for CO₂ Hydrogenation to Light Olefins

ACS Catalysis, Год журнала: 2025, Номер unknown, С. 5954 - 5967

Опубликована: Март 27, 2025

Promoters play a critical role in tuning the activity and selectivity of Fe catalysts CO2 hydrogenation to produce light olefins, which are key building blocks petrochemical industry. Herein, by combined experimental theoretical approach, we show that high stable performance could be achieved taking advantage promotional effect both Zn Zr. Structural characterization indicates ZnO improve dispersion reducibility oxides facilitate formation active carbide species, whereas ZrO2 stabilize structure catalytic performance, especially hydrocarbon products. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) experiments suggest carbonate, bicarbonate, formate, methoxy essential intermediates products, including paraffins olefins. The conversion kinetics each intermediate species dependent on type promoters as well phase species. DFT calculations revealed strong correlation between energy surface oxygen vacancies promoted oxides, accordance with results. Moreover, calculated profiles over different indicate promote activation its transformation oxygenate intermediates, while Zr oxygenates precursors. discrepancies evolution trend various transient DRIFTS can rationalized differences barriers elementary or rate limiting steps.

Язык: Английский

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Design Principles of Catalytic Materials for CO₂ Hydrogenation to Methanol

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 19, 2024

Abstract Heterogeneous catalysts are essential for thermocatalytic CO 2 hydrogenation to methanol, a key route sustainable production of this vital platform chemical and energy carrier. The primary catalyst families studied include copper‐based, indium oxide‐based, mixed zinc–zirconium oxides‐based materials. Despite significant progress in their design, research is often compartmentalized, lacking holistic overview needed surpass current performance limits. This perspective introduces generalized design principles catalytic materials ‐to‐methanol conversion, illustrating how complex architectures with improved functionality can be assembled from simple components (e.g., active phases, supports, promoters). After reviewing basic concepts ‐based methanol synthesis, engineering explored, building complexity single binary ternary systems. As nanostructures strongly depend on reaction environment, recent operando characterization techniques machine learning approaches examined. Finally, common rules centered around symbiotic interfaces integrating acid–base redox functions role optimization identified, pinpointing important future directions methanol.

Язык: Английский

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Modulation of inter-elemental synergy and oxygen vacancy content of CdZrOx solid solution catalysts by Ga for effective CO2 hydrogenation to methanol

Separation and Purification Technology, Год журнала: 2024, Номер unknown, С. 130834 - 130834

Опубликована: Ноя. 1, 2024

Язык: Английский

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Metal−Organic Framework-Derived Cu NWs@ZrO₂ as a Highly Selective Catalyst for Methanol Synthesis from CO₂ Hydrogenation

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 18, 2025

CO2 hydrogenation is one of the key technologies for carbon recycling and greenhouse effect mitigation. Cu-based catalysts have been widely used in to methanol. However, low catalytic efficiency instability limit their industrial application. Herein, a Zr-based metal-organic framework was synthesize Cu NWs@ZrO2 catalyst with Cu-ZrO2 interface. The shows high activity promising selectivity excellent stability synthesis methanol from hydrogenation. Density functional theory calculations situ diffuse reflectance Fourier transform infrared spectroscopy confirmed that on followed HCOO* pathway, interface made significant contribution intermediate step accelerated

Язык: Английский

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High value-added utilization of CO2: Materials, methods, and prospects for catalytic conversion of graphene prepared from CO2

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 133127 - 133127

Опубликована: Апрель 1, 2025

Язык: Английский

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Recent advances of CO2 hydrogenation to methanol

DeCarbon, Год журнала: 2025, Номер unknown, С. 100111 - 100111

Опубликована: Апрель 1, 2025

Язык: Английский

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Understanding the Photocatalytic Water Reduction Capability of NaM(WO₄)₂ (M = Ga, Sc) by the Electronic Structure and Bond Characteristic Analysis

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Июнь 2, 2025

m-WO3 has a narrow band gap, making it promising photocatalyst. However, its antibonding W-O orbitals limit water reduction capability due to insufficient potential. Incorporating weakly bonded M-O in NaM(WO4)2 (M = Ga, Sc) enhances covalency compared that m-WO3, resulting more negative conduction minimum (CBM) potential, sufficient for photocatalytic reduction. Here, were synthesized via high-temperature solid-state reactions, and their precise structures determined through Rietveld refinement of high-resolution XRD data. Density functional theory (DFT) calculations performed analyze the electronic structures, bond characters further examined using crystal orbital Hamilton population (COHP), index (COBI), electron localization function (ELF). Experimentally, NaGa(WO4)2 loaded with 0.63 wt % Pd NaSc(WO4)2 0.94 exhibited H2 generation rates 2.45 6.30 μmol/h, respectively, under UV irradiation methanol aqueous solution. Apparent quantum yields at 295 nm are estimated be 0.66 2.21%, respectively. Notably, displayed superior activity, which can attributed CBM as discussed comparison structures.

Язык: Английский

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Selective hydrogenation of 5‐hydroxymethylfurfural to 5‐hydroxymethyltetrahydrofurfural over heterogeneous Pd catalyst under mild conditions

ChemCatChem, Год журнала: 2024, Номер unknown

Опубликована: Окт. 14, 2024

Abstract 5‐Hydroxymethylfurfural (5‐HMF) derived from lignocellulose represents an important platform molecule that could be employed in the selective hydrogenation of furan ring to prepare 5‑hydroxymethyltetrahydrofurfural (HMTHF). However, reported catalytic systems for synthesis HMTHF using 5‐HMF still require additional hydrogen pressure. In this study, Pd/ZrO 2 catalyst with uniformly dispersed Pd nanoparticles was prepared via a simple impregnation reduction process. This exhibited excellent activity and selectivity HMTHF. High yields up 92.3% were produced under mild reaction conditions ambient pressure room temperature methanol solvent. result superior most had been so far. The mechanism study revealed active species on surface solvent pivotal factors influencing rings 5‐HMF.

Язык: Английский

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