Constructing Zn-based MOF-MXene nanoarchitectures to stabilize ultrafine Pt nanocrystals with enhanced methanol oxidation performance

Carbon, Journal Year: 2024, Volume and Issue: 226, P. 119171 - 119171

Published: April 22, 2024

Language: Английский

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Synergistic promotion of ultra-small Pt nanoparticles and oxygen vacancy in MOF catalyst for ethyl levulinate to valerolactone at room temperature

Chemical Synthesis, Journal Year: 2025, Volume and Issue: 5(2)

Published: Feb. 17, 2025

Currently, designing highly efficient catalysts for biomass hydrogenation at low temperatures remains a significant challenge. This paper proposes straightforward solvent-treatment strategy to create rich oxygen vacancies (OV), facilitating the loading of ultra-small (1.6 nm) Pt nanoparticles (NPs) onto metal-organic framework (MOF) (LaQS) with OV (LaOV-r). Consequently, bifunctional Pt2/LaOV-r catalyst, featuring Lewis acid and metal sites, was synthesized. Under mild conditions (80 °C), catalyst exhibited catalytic yield >99% in converting biobased ethyl acetylpropionate [ethyl levulinate (EL)] valerolactone [γ-valerolactone (GVL)]. 3.2 13.3 times higher than those measured by Pt2/LaQS commercial Pt/C catalysts, respectively. Specifically, catalyzed full conversion EL GVL even room temperature. The results revealed that synergistic effect between NPs MOF is important into GVL. Especially, abundant defects LaOV-r not only enhanced electron cloud density active sites hydrogenation, but also elevated content moderately-strong acidic sites. enhances ability activate H2 EL, promotes intra-molecular dehydration intermediates mechanism MOFs proposed. study presents an effective defect engineering aimed enhancing using MOFs-loaded NPs.

Language: Английский

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Confined Palladium Nanocrystals within Covalent Organic Framework-Intercalated MXene Nanoarchitectures toward Highly Efficient Methanol Electrooxidation

Chemistry of Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Language: Английский

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Interconnected Pd Nanowire Networks Stereoassembled on Biomass-Derived Porous Carbon Skeletons as Bifunctional Electrocatalysts for Efficient Methanol and Formic Acid Oxidation

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(28), P. 10615 - 10623

Published: June 28, 2024

Language: Английский

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Ultrathin PdMo bimetallene immobilized on graphene nanosheets as an efficient bifunctional electrocatalyst towards formic acid and methanol oxidation reactions

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 80, P. 1174 - 1181

Published: July 20, 2024

Language: Английский

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High-index facets Pt concave nanocubes with small interface angles induced by N-defective sites in the integrated electrode for methanol oxidation

Journal of Power Sources, Journal Year: 2024, Volume and Issue: 612, P. 234787 - 234787

Published: May 31, 2024

Language: Английский

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Graphitic Carbon Nitride as a Promising Visible‐Light‐Activated Support Boosting Platinum Nanoparticle Activity in Ethanol Electrooxidation

ChemSusChem, Journal Year: 2024, Volume and Issue: unknown

Published: July 9, 2024

Abstract In the present work, exfoliated graphitic carbon nitride (g‐CN) is immobilized on paper substrates by a simple electrophoretic route, and subsequently decorated with ultra‐low amounts (≈μg/cm 2 ) of Pt nanoparticles (NPs) cold plasma sputtering. Optimization preparative conditions allowed fine tuning NPs size, loading distribution thus controlled tailoring g‐CN/Pt interfacial interactions. Modulation such features yielded g‐CN‐Pt‐based anode materials appealing activity stability towards ethanol oxidation reaction (EOR) in alkaline aqueous solutions, as revealed electrochemical tests both dark under irradiation. The results provide new insights design nano‐engineered heterocomposites featuring improved performances thanks to coupling g‐CN, low‐cost environmentally friendly visible light‐active semiconductor. Overall, this work might open attractive avenues for generation green hydrogen via electrolysis photo‐promoted alcohol electrooxidation fuel cells.

Language: Английский

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Mesoporous Hollow Carbon Sphere-Embedded MXene Architectures Decorated with Ultrafine Rh Nanocrystals toward Methanol Electrooxidation

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(36), P. 16888 - 16896

Published: Aug. 28, 2024

The development of advanced Pt-alternative anode electrocatalysts with high activity and reliable stability is critical to overcoming the technical challenges direct methanol fuel cells. Here, we propose a robust bottom-up strategy for spatial construction mesoporous hollow carbon sphere (HCS)-embedded MXene architectures decorated ultrafine Rh nanocrystals (Rh/HCS-MX) via stereoscopic coassembly reactions. rational intercalation HCS effectively separates nanowalls achieve rapid mass-transfer efficiency, while intimate coupling hybrid carrier enables their electronic structure optimization, thus contributing strong synergistic catalytic effects. Accordingly, resulting Rh/HCS-MX exhibit outstanding electrooxidation properties in terms large electrochemical active surface areas, mass/specific activities, good long-term stability, all which are significantly superior traditional Rh/carbon black, Rh/HCS, Rh/MXene as well commercial Pt/carbon balck Pd/carbon electrocatalysts.

Language: Английский

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Three-dimensional porous Pt/N-MXene catalyst for dehydrogenation of a liquid organic hydrogen carrier

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159769 - 159769

Published: Jan. 1, 2025

Language: Английский

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A brief review on the progress of MXene-based catalysts for electro- and photochemical water splitting for hydrogen generation

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The development and generation of affordable highly efficient energy, particularly hydrogen, are one the best approaches to address challenges posed by depletion non-renewable energy sources.

Language: Английский

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