High Entropy Oxide-Polyoxometalate Sub-1 nm Hetero-Nanowires as Cathode Catalysts in Li–O₂ Batteries

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

Опубликована: Фев. 28, 2025

It is desirable for lithium-oxygen batteries (LOBs) to fabricate the cathode catalysts with high catalytic activity and stability. High entropy oxide (HEO) sub-1 nm nanowires (SNWs) nearly 100% active site exposure intrinsic stability are doubtless one of best candidates. Herein, under a mild solvothermal condition, by incorporating phosphomolybdic acid (PMA) into multimetal reaction system, series HEO-PMA SNWs successfully prepared, where variety metal oxides adjustable from mono component six components. When these as applied LOBs, capacity cycling LOBs steadily improved species increasing stepwise, indicating that modulation effect plays an important role in enhancing battery performance. Additionally, considering difference various oxides, performance further optimized keeping number elements constant just adjusting kind oxide. Particularly, BiCuFeCeWPtOx-PMA based delivers (11206 mA h g-1) excellent 213 cycles, making it promising electrocatalyst candidate LOBs.

Язык: Английский

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Ultralight and Flexible Subnanowire Aerogels for Intrinsically Hydrophobic Thermal Insulation

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

Aerogels are regarded as the next generation of thermal insulators; however, conventional aerogels suffer from issues such brittleness, low moisture resistance, and a complex production process. Subnanowires (SNWs) emerging materials known for their exceptional flexibility, toughness, intrinsic hydrophobicity, gelling capabilities, making them ideal building blocks flexible, tough, hydrophobic, thermally insulating aerogels. Herein, we present simple scalable strategy to construct SNW by freeze-drying hydroxyapatite (HAP) dispersions in cyclohexane. The resulting consist three-dimensional porous flakes composed thin layers bundles. They exhibit numerous outstanding properties, including ultralow density (12.33 mg·cm–3), high porosity (99.15%), remarkable flexibility excellent insulation properties (27.53 mW·m–1·K–1). Because HAP SNWs cores capped with hydrocarbon chains, demonstrate hydrophobicity (138° water contact angle) superior stability compared polymer foams. Furthermore, can effectively shield against infrared radiation due conductivity. This work suggests that serve intrinsically hydrophobic aerogels, paving way future applications insulation.

Язык: Английский

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Experimental and Theoretical Study of Two 3D Difunctional Electrocatalytic Hybrid Vanadate-Containing Metal–Organic Motifs

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Two novel 3D inorganic-organic hybrids based on [V6O18]6-/[V3O9]3- clusters, [Cu18(bbpy)18(V6O18)6]·3H2O (1) and [Cu4Ag4(pty)4(V3O9)4]·H2O (2) (bbpy = 3,5-bis(1-benzimidazole) pyridine, pty 4'-(4″-pyridyl)-2,2':6',2″-terpyridine), were isolated in the same POV/Cu/N-heterocycle ligand reaction systems. Hybrids 1 2 possess three-dimensional bimetallic frameworks derived from clusters Cu-organic complexes. In 1, bbpy ligands are grafted by Cu2+ to a grid ribbon 2D sheet, which connected with benzene-like [V6O18]6- yield framework. 2, helical {O-V-O-V-}n chains bridged Cu(II) ions into layer including eight-membered rings {V6Cu2} six-membered {V4Cu2}, adjoining sheets joined Ag-N coordination bonds form framework structure. Moreover, hybrid has superior electrocatalytic properties for nitrite reduction oxidation of ascorbic acid efficiencies 397.2 96%, respectively. Hybrid displays coordinated performance toward through V Cu centers. Meanwhile, corresponding theoretical studies conducted evaluate active sites charge distribution.

Язык: Английский

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A Universal Strategy to Increase the Mechanical Performance of Polymer‐Inorganic Composites by Sub‐1 nm Hetero‐Nanowires

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 16, 2025

Abstract Sub‐1 nm nanowires (SNWs) with diameter near that of a single polymer chain can perform polymer‐like properties, which provides better compatibility for the combination SNWs polymers to further improve their mechanical performances. Here, Ce 2 O 3 ‐phosphomolybdic acid (CS) are synthesized flexible and viscous properties. Based on special universal method is developed fabricate polymer‐inorganic composite films by simply mixing CS various kinds (including polyimide (PI), polyvinylpyrrolidone (PVP), polyoxyethylene (PEO) polystyrene (PS)), respectively. The tensile strength elongation these significantly improved simultaneously while optical properties remain unchanged. increases 136% (CS‐PI film), 280% (CS‐PVP 256% (CS‐PEO 128% (CS‐PS film) compared pure films, reach up 55 ± 5% 9 2% 215 17 Meanwhile, functionalize final composites due designable inorganic components, as demonstration CS‐PI film used separator in Zn||Zn symmetric cells, last 430 h, almost three times longer than commercial glass fiber.

Язык: Английский

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Soft Matter Photonics: Interplay of Soft Matter and Light

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

The light-soft matter interaction and its applications form the foundation of Soft Matter Photonics, here termed "Soft Mattonics", positioning it as fertile ground for developing next-generation photonic technologies. Over past few decades, this rapidly evolving field has achieved significant advancements, leading to successful across a wide range disciplines, including optoelectronics, photonics, information technology, material science, robotics, biomedicine, astronomy. In Perspective, we provide an overview Mattonics, highlighting recent developments in light-controlled soft their light manipulating. Additionally, offer insights into future research directions with emphasis on both foundational practical that will drive continued growth innovation field.

Язык: Английский

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Multi‐Compatible, Self‐Healing, and Temperature‐Responsive Organohydrogels by Sub‐Nanowires

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 27, 2025

Organohydrogels have significant applications in numerous fields. The current synthetic strategies generally rely on the intricate and complex design of lipophilic or hydrophilic polymers to achieve goal oil-water interpenetration. Herein, sub-nanowires organohydrogels with a dual-phase structure are fabricated by simply mixing hydroxyapatite organic solvent aqueous phase. oil phase provide structural support, while surfactants exist at interface between water, thus forming water-in-oil structure. possess commendable mechanical properties, an inherent self-healing ability, specific temperature-responsive behavior. Moreover, compatible variety solvents polymers, reserving promise for wide-range future.

Язык: Английский

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Defects-Induced Modification Strategy and Electrochemical Mechanisms of Ni3Fe-Based Electrode Materials

Acta Materialia, Год журнала: 2025, Номер unknown, С. 121016 - 121016

Опубликована: Апрель 1, 2025

Язык: Английский

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Selenium‐Mediated Sub‐1 nm Amorphous Shell Spatially Confines Platinum Nanocrystal for Efficient Hydrogen Evolution

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 20, 2025

Abstract Ultrafine nanocatalysts can provide abundant catalytic sites, but typically it is less stable and susceptible to dissolution diffusion. Here, this work reports a selenium‐mediated strategy construct sub‐nanometers amorphous shell on ultrafine Pt nanocrystal core, forming Pt@PtSe x core/shell nanostructure. In developed strategy, the active Se‐oleylamine precursor after nucleation confines overgrowth oriented attachment of Pt, allowing in situ formation nanostructures combining size sub‐nano shell. Essentially, PtSe not only optimize hydrogen adsorption energy lower water dissociation energy, also retard atoms, thus leading significantly improved activity durability both acidic alkaline electrolytes. The overall splitting be driven by small cell voltage 1.48/1.53 V at 10 mA cm −2 0.5 M H 2 SO 4 /1.0 KOH, respectively. Moreover, ‐1 with ≈0.8 nm thick exhibits ultra‐high mass 75.2 A mg −1 18.4 −70 mV, as well robust operation for 1100 h 100 (1300 160 acidic), superior most reported Pt‐based electrocatalysts.

Язык: Английский

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Crystalline Peptoid Nanofibers with a Single-Unit Cell Cross Section

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

Опубликована: Июнь 5, 2025

Ultranarrow crystalline one-dimensional nanostructures formed from soft materials facilitate precise structural control in nanomaterial design, which is essential for biomedicine and nanotechnology applications. Systematic of their hierarchical structure challenging due to the complexities simultaneously manipulating multiple noncovalent interactions at such small scales. We employed a polypeptoid crystal motif as supramolecular synthon engineer ultranarrow nanofibers constrained single lattice axis by incorporating ionizable side chain into hydrophobic core nanosheet-forming peptoid. Cryogenic transmission electron microscopy revealed detailed molecular arrangements unit-cell cross-section presence distinct pH-dependent isoforms that resulted morphological transformations. Molecular dynamics simulations demonstrated plays critical role changing local conformation unit cell, further impacts dimensionality structures. Moreover, these fibers were readily functionalized with biological ligands afford (1D) protein arrays. This approach high-precision bottom-up assembly 1D offers significant potential developing novel biomimetic nanostructures.

Язык: Английский

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Advanced progress of sub-nanomaterials: From synthesis strategies, unique properties to applications

Materials Today Chemistry, Год журнала: 2024, Номер 43, С. 102491 - 102491

Опубликована: Дек. 28, 2024

Язык: Английский

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