Oxygen Defect Engineering Promotes Synergy Between Adsorbate Evolution and Single Lattice Oxygen Mechanisms of OER in Transition Metal‐Based (oxy)Hydroxide

Advanced Science, Год журнала: 2023, Номер 10(32)

Опубликована: Окт. 9, 2023

The oxygen evolution reaction (OER) activity of transition metal (TM)-based (oxy)hydroxide is dominated by the number and nature surface active sites, which are generally considered to be TM atoms occupying less than half with most being inactive atoms. Herein, based on an in situ competing growth strategy bimetallic ions OH- ions, a facile one-step method proposed modulate defects NiFe-layered double hydroxide (NiFe-LDH)/FeOOH heterostructure, may trigger single lattice mechanism (sLOM). Interestingly, only varying addition H2 O2 , one can simultaneously regulate concentration defects, valence ratio components. proper promote synergy between adsorbate (AEM, redox chemistry) sLOM (oxygen OER NiFe-based (oxy)hydroxide, practically maximizing use as sites. Consequently, optimal NiFe-LDH/FeOOH heterostructure outperforms reported non-noble catalysts electrocatalytic activity, overpotential 177 mV deliver current density 20 mA cm-2 high stability. novel exemplifies versatile approach designing highly TM-LDH-based electrocatalysts for energy environmental applications.

Язык: Английский

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Photogenerated Defect‐Transit Dual S‐Scheme Charge Separation for Highly Efficient Hydrogen Production

Advanced Functional Materials, Год журнала: 2023, Номер 33(42)

Опубликована: Июнь 16, 2023

Abstract The rational design of a step‐scheme (S‐scheme) heterojunctions in hybrid semiconductors by avoiding unwanted charge transport paths is considered as an attractive way to achieve high photocatalytic activity hydrogen evolution reaction (HER). Here, dual S‐scheme heterojunction formed the lychee‐shaped W 18 O 49 /CdWO 4 /CdS nanostructures proposed for improving performance HER under visible light irradiation. remarkable attributed unique structure and effective separation photoinduced defect‐transit mechanism strong internal electric field. measurements X‐ray photoelectron spectroscopy (XPS), femtosecond transient absorption (fs‐TA) spectroscopy, electron paramagnetic resonance (EPR) further confirm carrier transfer pathways following mechanism. This research can provide new strategy designing improve through defect band engineering.

Язык: Английский

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Enhanced photocatalytic performance of the N-rGO/g-C₃N₄ nanocomposite for efficient solar-driven water remediation

Nanoscale, Год журнала: 2024, Номер 16(12), С. 6109 - 6131

Опубликована: Янв. 1, 2024

N-rGO/g-C 3 N 4 as a metal-free photocatalyst has been synthesised via facile and eco-friendly hydrothermal route that exhibits remarkable photodegradation efficiency towards organic pollutants antibiotics under the simulated solar irradiation.

Язык: Английский

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A Dual S-scheme Heterojunction SrTiO3/SrCO3/C-doped TiO2 as H2 Production Photocatalyst and Its Charge Transfer Mechanism

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 356, С. 124232 - 124232

Опубликована: Май 23, 2024

Язык: Английский

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Bi, K co-doped graphitic phase carbon nitride for efficient photocatalytic H2O2 production

Chemical Engineering Journal, Год журнала: 2024, Номер 489, С. 151145 - 151145

Опубликована: Апрель 9, 2024

Язык: Английский

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MOF‐derived Carbon‐Based Materials for Energy‐Related Applications

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 10, 2025

Abstract New carbon‐based materials (CMs) are recommended as attractively active due to their diverse nanostructures and unique electron transport pathways, demonstrating great potential for highly efficient energy storage applications, electrocatalysis, beyond. Among these newly reported CMs, metal–organic framework (MOF)‐derived CMs have achieved impressive development momentum based on high specific surface areas, tunable porosity, flexible structural‐functional integration. However, obstacles regarding the integrity of porous structures, complexity preparation processes, precise control components hinder regulation interface engineering in CMs. In this context, review systematically summarizes latest advances tailored types, processing strategies, energy‐related applications MOF‐derived focuses structure‐activity relationship metal‐free carbon, metal‐doped metallide‐doped carbon. Particularly, intrinsic correlation evolutionary behavior between synergistic interaction micro/nanostructures species with electrochemical performances emphasized. Finally, insights perspectives relevant research presented, future prospects challenges discussed, providing valuable guidance boost high‐performance electrodes a broader range application fields.

Язык: Английский

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Filling the Gap: Atomically Precise Metal Nanoclusters‐Induced Z‐Scheme Photosystem toward Robust and Stable Solar Hydrogen Generation

Advanced Functional Materials, Год журнала: 2023, Номер 33(48)

Опубликована: Июль 26, 2023

Abstract Atomically precise metal nanoclusters (NCs) represent a promising generation of nanomaterial because characteristic atomic stacking mode, abundant catalytic active sites, and molecular‐like discrete energy band structure. However, crafting NCs‐dominated photocatalytic systems with mediated charge transport pathways for photoredox catalysis is in the infant stage their mechanisms remain elusive, which largely hampered by ultra‐short lifetime, generic instability, complicated electronic structure NCs. In this study, smart construction all‐solid‐state NCs‐transition chalcogenides quantum dots (TMCs QDs) Z‐scheme artificial photosystems robust stable solar‐to‐hydrogen conversion demonstrated. The concurrent favorable photosensitization efficiency NCs TMCs QDs synergistically stimulate unexpected pathway, significantly boosts anisotropic spatial vectorial transport/separation, giving rise to considerably enhanced visible‐light‐responsive hydrogen performances along stability. This study would push forward prosperity exploring NCs‐based conversion.

Язык: Английский

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Facile synthesis of a Z-scheme CeO2/C3N4 heterojunction with enhanced charge transfer for CO2 photoreduction

Science China Materials, Год журнала: 2023, Номер 66(8), С. 3165 - 3175

Опубликована: Май 30, 2023

Язык: Английский

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Simultaneous Hydrogen Generation and Exciplex Stimulated Emission in Photobasic Carbon Dots

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(33)

Опубликована: Июнь 24, 2023

Abstract Photocatalytic water splitting is a promising approach to generating sustainable hydrogen. However, the transport of photoelectrons catalyst sites, usually within ps‐to‐ns timescales, much faster than proton delivery (∼μs), which limits activity. Therefore, acceleration abstraction protons from molecules towards catalytic sites keep up with electron transfer rate can significantly promote hydrogen production. The photobasic effect that increase in affinity upon excitation offers means achieve this objective. Herein, we design carbon dots and identify internal pyridinic N are intrinsically photobasic. This supported by steady‐state ultrafast spectroscopic measurements demonstrate few picoseconds excitation. Furthermore, show water, they form unique four‐level lasing scheme optical gain stimulated emission. latter competes photocatalysis, revealing rather mechanism for efficiency loss, such emission act as toggle photocatalytic provides additional controlling process helps rational materials.

Язык: Английский

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Photoreduction of Aqueous Protons Coupling with Alcohol Oxidation on a S‐Scheme Heterojunction Photocatalyst MnO/Carbon Nitride

Small, Год журнала: 2023, Номер 20(12)

Опубликована: Ноя. 6, 2023

Abstract Crystalline carbon nitride (CCN), derived from amorphous polymeric CN, is considered as a new generation of metal‐free photocatalyst because its high crystallinity. In order to further promote the photocatalytic performance CCN, p‐type MnO nanoparticles are in situ synthesized and merged with n‐type CCN through one‐pot process form p–n heterojunction. The formed interfacial electric field between semiconductors different work functions efficiently breaks coulomb interaction CCN. prepared catalysts exhibit drastically increased hydrogen evolution (PHE) activity integrated oxidation alkyl aryl alcohols under irradiation visible light. aqueous solution benzyl alcohol (BzOH), rate over MnO/CCN (39.58 µmol h −1 ) nearly 7 times 37 that pure (5.76 CN (1.06 ), respectively, combining BzOH benzaldehyde. This proposes an avenue for construction novel 2D material‐based S‐scheme heterojunction extends application solar energy conservation utilization.

Язык: Английский

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