Reinforced Hole Trapping in S‐Scheme Photoharvesters for Markedly Enhanced Photocatalytic Hydrogen Evolution and Nitrogen Fixation

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 7, 2025

Abstract The S‐scheme heterojunction exerts a profoundly positive influence on enhancing carrier separation efficiency and redox capability. However, there are few reports accelerating the reaction rate of photogenerated charge carriers, particularly consumption holes in heterojunction. Herein, an situ construction strategy is employed to construct ultra‐small nonprecious metal NiO (≈2 nm) By incorporating into heterojunctions, photocatalytic hydrogen production performance significantly improved by 380 times, nitrogen fixation enhanced 20 times. Density function theoretical (DFT) calculations, X‐ray photoelectron spectroscopy (in XPS), Diffuse Reflectance Infrared Fourier Transform Spectroscopy DRIFTS) characterization results indicate that incorporation heterojunctions can not only enhance photo‐generated carriers ability but also further promote sacrificial agents, thereby achieving secondary enhancement efficiency. Therefore, (H 2 ) (N markedly improved. successful execution this work provides novel approach material structure design, offering valuable insights for development improvement high‐performance materials.

Язык: Английский

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Ru Nanoparticles Modified and V-Doped NiFe-Layered Double Hydroxide as Efficient Electrocatalyst for Overall Urea Splitting

ACS Applied Nano Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 13, 2024

Constructing low-cost, high-efficiency, and earth-abundant electrocatalysts for enhancing the energy efficiency of water splitting is highly desirable. Herein, we employed a facile strategy V cation doping Ru nanoparticles modification to construct multifunctional NiFe-LDH electrocatalyst (Ru/V-NiFe-LDH) on nickel foam (NF) substrate. This Ru/V-NiFe-LDH/NF catalyst exhibited exceptional catalytic activity (e.g., small overpotentials Tafel slope) good stability in HER, OER, UOR, indicating significantly lower than that commercial Pt–C RuO2. These excellent electrochemical properties primarily resulted from effects modification, which altered surface charge state matrix, led electron rearrangement, accelerated transfer, provided more active sites, enhanced intrinsic activity. Moreover, when assembled into two-electrode system with overall water/urea splitting, low cell voltage 1.53 1.40 @10 mA cm–2 was afforded. Furthermore, this also outstanding stability, only 19% decay high current density at 50 after 48 h. performances far surpass those RuO2||Pt–C most nonprecious-metal catalysts. work highlights rational design high-performance applications.

Язык: Английский

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Robust Coupling Between Piezoelectric Field and Interfacial Polarization in Layered Bismuth‐Based Heterostructure for High‐performance Piezocatalytic Water Splitting

Small, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

The creation of heterostructures with inherent interface polarization has been proven effective in enhancing piezocatalytic activity; however, developing efficient heterostructure piezocatalysts remains challenging, and the underlying mechanisms are not well understood. In this work, a stable Bi2WO6/BiOBr strong chemical binding is successfully constructed by exchanging double Br- WO4 2- hydrothermal reaction. demonstrates exceptional hydrogen evolution reaction (HER) efficiencies 0.75 mmol g⁻¹ h⁻¹ water 2.28 methanol solution, respectively, outperforming majority recently reported bismuth-based piezocatalysts. During operations, robust coupling between stress-induced piezoelectric field interfacial pivotal. This results large intrinsic dipole moment, excellent piezoelectricity, improved carrier separation transfer. Additionally, polar surface facilitates decreased Gibbs free energy, increased potential, reduced charge transfer resistance, all which contribute to high-activity study introduces simple universal method for situ construction layered high performance offers valuable insights into role piezocatalysis.

Язык: Английский

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Oxygen Vacancy Engineering of Bi₄Ti₃O₁₂ Piezocatalyst Driving In Situ H₂O₂ Evolution for Self-Cycled Fenton-Like Degradation of Pollutants

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

In this work, we synthesized a Bi4Ti3O12 piezocatalyst with surface oxygen vacancy (BTO-Ov) to facilitate in situ hydrogen peroxide (H2O2) production and establish piezocatalytic self-cycled Fenton-like system for degradation of pollutants. Notably, the H2O2 evolution rate from BTO-Ov catalyst reaches 558.8 μmol g–1 h–1 when utilizing pure water, significantly exceeding obtained BTO (274.6 h–1). Furthermore, can be enhanced 1091.6 addition ethanol as sacrificial agent endows robust stability. (BTO-Ov/Fe0), efficiency methyl orange (MO) dye pollutant achieve 91.9% within 20 min, coupled high kinetic coefficient 0.117 min–1, indicating excellent catalytic activity. Relevant characterization results reveal that introduction improves piezoelectricity, reduces band gap BTO, enhances charge carrier transfer separation, facilitates dual-channel reaction mechanism, thereby achieving superior performance. This work not only synthesis valuable chemicals but also offers cost-effective sustainable approach wastewater purification.

Язык: Английский

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High-performance piezocatalytic hydrogen evolution over bismuth oxyhalides with halogen-dependent piezoelectricity and surface activity

Rare Metals, Год журнала: 2025, Номер unknown

Опубликована: Апрель 4, 2025

Язык: Английский

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Engineering Piezoelectricity and Strain Sensitivity on Nanostructured Bi₂WO₆ for Piezocatalytic Hydrogen Peroxide Production

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 28, 2025

Язык: Английский

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