2D Transition Metal Dichalcogenides for Photocatalysis

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(13)

Published: Jan. 3, 2023

Abstract Two‐dimensional (2D) transition metal dichalcogenides (TMDs), a rising star in the post‐graphene era, are fundamentally and technologically intriguing for photocatalysis. Their extraordinary electronic, optical, chemical properties endow them as promising materials effectively harvesting light catalyzing redox reaction Here, we present tutorial‐style review of field 2D TMDs photocatalysis to educate researchers (especially new‐comers), which begins with brief introduction fundamentals along synthesis this type material, then look deeply into merits co‐catalysts active photocatalysts, followed by an overview challenges corresponding strategies photocatalysis, finally ahead topic.

Language: Английский

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Bifunctional WC‐Supported RuO₂ Nanoparticles for Robust Water Splitting in Acidic Media

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(21)

Published: March 10, 2022

We report the strong catalyst-support interaction in WC-supported RuO2 nanoparticles (RuO2 -WC NPs) anchored on carbon nanosheets with low loading of Ru (4.11 wt.%), which significantly promotes oxygen evolution reaction activity a η10 347 mV and mass 1430 A gRu-1 , eight-fold higher than that commercial (176 ). Theoretical calculations demonstrate between WC support could optimize surrounding electronic structure sites to reduce barrier. Considering likewise excellent catalytic ability for hydrogen production, an acidic overall water splitting (OWS) electrolyzer good stability constructed by bifunctional NPs only requires cell voltage 1.66 V afford 10 mA cm-2 . The unique 0D/2D nanoarchitectures rationally combining precious metal oxides provides promising strategy tradeoff high cost OWS applications.

Language: Английский

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Synthesis of atomically thin sheets by the intercalation-based exfoliation of layered materials

Nature Synthesis, Journal Year: 2023, Volume and Issue: 2(2), P. 101 - 118

Published: Feb. 13, 2023

Language: Английский

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Deciphering the Space Charge Effect of the p–n Junction between Copper Sulfides and Molybdenum Selenides for Efficient Water Electrolysis in a Wide pH Range

ACS Nano, Journal Year: 2022, Volume and Issue: 16(9), P. 15425 - 15439

Published: Aug. 29, 2022

Space charge transfer is crucial for an efficient electrocatalytic process, especially narrow-band-gap metal sulfides/selenides. Herein, we designed and synthesized a core-shell structure which ultrathin MoSe2 nanosheet coated CuS hollow nanoboxes (CuS@MoSe2) to form open p-n junction structure. The space effect in the region will greatly improve electron mass conduction, also have abundant active interfaces. It was used as bifunctional electrocatalyst water oxidation at wide pH range. exhibits low overpotential of 49 mV HER 236 OER current density 10 mA·cm-2 acidic pH, 72 219 alkaline 62 230 under neutral conditions. experimental results functional theory calculations testify that CuS@MoSe2 has strong with synergistic effect. built-in field can boost transport during process stabilize charged center junction. This be beneficial performance. work provides understanding semiconductor heterojunction applications regulating electronic sites.

Language: Английский

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In situ TEM visualization of LiF nanosheet formation on the cathode-electrolyte interphase (CEI) in liquid-electrolyte lithium-ion batteries

Matter, Journal Year: 2022, Volume and Issue: 5(4), P. 1235 - 1250

Published: Feb. 7, 2022

Language: Английский

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Simultaneous Electrochemical Exfoliation and Covalent Functionalization of MoS₂ Membrane for Ion Sieving

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(26)

Published: April 23, 2022

Transition metal dichalcogenide membranes exhibit good antiswelling properties but poor water desalination property. Here, a one-step covalent functionalization of MoS2 nanosheets for membrane fabrication is reported, which accomplished by simultaneous exfoliating and grafting the lithium-ion-intercalated in organic iodide solution. The lithium intercalation amount optimized so that quality produced 2D improved with homogeneous size distribution. lamellar are tested reverse osmosis (RO), functionalized exhibits rejection rates >90% >80% various dyes (Rhodamine B, Crystal Violet, Acid Fuchsin, Methyl Orange, Evans Blue) NaCl, respectively. excellent ion-sieving performance permeability attributed to suitable channel widths tuned iodoacetamide. Furthermore, stability NaCl dye solutions also confirmed RO tests. Molecular dynamics simulation shows molecules tend form single layer between amide-functionalized layers double ethanol-functionalized (MoS2 -ethanol) layers, indicates less packed structure -ethanol leads lower hydrodynamic resistance higher permeation.

Language: Английский

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Progress and prospects of two-dimensional materials for membrane-based osmotic power generation

Deleted Journal, Journal Year: 2022, Volume and Issue: 1, P. e9120008 - e9120008

Published: May 25, 2022

The electrical energy that can be harnessed from the salinity difference across sea water and river interface one of sustainable clean resources future. This via nanofluidic channels selectively permeate ions. selective diffusion cations anions produce electricity through reverse electrodialysis. Two-dimensional (2D) materials are a class nanomaterials hold great promise in this field. Several breakthrough works have been previously published which demonstrate high power densities 2D membranes. ion transportation either nano-sized in-plane pores or interlayer spacings materials. review article highlights progress for gradient generation. types membranes with various nano-architectures discussed article. These include atom-thick nanopores, lamellar membranes, 2D/one-dimensional (1D), 2D/2D hybrid fabrication techniques, physical characteristics, properties, osmotic generation these elaborated Finally, we overview future research direction area. It is envisioned on make practical step closer to reality.

Language: Английский

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Layer-Structured Anisotropic Metal Chalcogenides: Recent Advances in Synthesis, Modulation, and Applications

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(7), P. 3329 - 3442

Published: Jan. 31, 2023

The unique electronic and catalytic properties emerging from low symmetry anisotropic (1D 2D) metal chalcogenides (MCs) have generated tremendous interest for use in next generation electronics, optoelectronics, electrochemical energy storage devices, chemical sensing devices. Despite many proof-of-concept demonstrations so far, the full potential of has yet to be investigated. This article provides a comprehensive overview recent progress made synthesis, mechanistic understanding, property modulation strategies, applications chalcogenides. It begins with an introduction basic crystal structures, then physical 1D 2D MCs. Controlled synthetic routes MC crystals are summarized example advances solution-phase vapor-phase exfoliation. Several important approaches modulate dimensions, phases, compositions, defects, heterostructures MCs discussed. Recent significant highlighted optoelectronic catalysts, batteries, supercapacitors, platforms, thermoelectric ends prospects future opportunities challenges addressed academic research practical engineering

Language: Английский

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Recent Progress on Phase Engineering of Nanomaterials

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(23), P. 13489 - 13692

Published: Nov. 14, 2023

As a key structural parameter, phase depicts the arrangement of atoms in materials. Normally, nanomaterial exists its thermodynamically stable crystal phase. With development nanotechnology, nanomaterials with unconventional phases, which rarely exist their bulk counterparts, or amorphous have been prepared using carefully controlled reaction conditions. Together these methods are beginning to enable engineering (PEN), i.e., synthesis phases and transformation between different obtain desired properties functions. This Review summarizes research progress field PEN. First, we present representative strategies for direct modulation diverse kinds nanomaterials. We cover ranging from metal nanostructures such as Au, Ag, Cu, Pd, Ru, alloys; oxides, borides, carbides; transition dichalcogenides (TMDs) 2D layered review growth wet-chemical reduction seed-mediated epitaxial chemical vapor deposition (CVD), high pressure transformation, electron ion-beam irradiation. After that, summarize significant influence on various unconventional-phase also discuss potential applications developed areas including catalysis, electrochemical energy storage (batteries supercapacitors), solar cells, optoelectronics, sensing. Finally, existing challenges future directions

Language: Английский

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Isolated Single-Atom Cobalt in the ZnIn₂S₄ Monolayer with Exposed Zn Sites for CO₂ Photofixation

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(12), P. 8317 - 8329

Published: June 7, 2023

Constructing highly active photocatalysts with rich reactive sites for photofixation of CO2 organic compounds implements an environmentally friendly route valorization and carbon neutralization. Herein, we report the isolated cobalt (Co) single-atom (SA)-decorated two-dimensional (2D) single-layer ZnIn2S4 (ZIS) nanosheet composites (Co-sZIS) dual centers Co Zn fixation epoxides under visible light. The unique ensemble Co-sZIS optimizes light harvesting, promotes charge carrier separation, enriches bifunctional efficient adsorption activation reactants CO2. Consequently, exhibits significantly improved CO2-epoxide cycloaddition performance compared to bulk ZIS. In addition, synergetic photoredox manner simultaneously exploiting photogenerated electrons holes efficiently facilitates epoxides, thereby further reducing energy barrier fixation. This work not only provides a paradigm rationally interfacial engineered SA-onto-2D semiconductors but also highlights structure–activity relationship by well-defined in this SA-based hybrid platform.

Language: Английский

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