Laser-controlled tandem catalytic sites of CuNi alloys with ampere-level electrocatalytic nitrate-to-ammonia reduction activities for Zn–nitrate batteries

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(7), P. 2991 - 3001

Published: Jan. 1, 2023

Laser-constructed CuNi alloy electrodes with tandem sites of Ni provide H* and Cu for NO 3 − reduction, achieving ampere-level reduction high-performance Zn–NO batteries.

Language: Английский

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Constructing fast charge separation of ZnIn2S4 @CuCo2S4 p-n heterojunction for efficient photocatalytic hydrogen energy recovery from quinolone antibiotic wastewater

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 341, P. 123284 - 123284

Published: Sept. 9, 2023

Language: Английский

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2D semiconductor nanosheets for solar photocatalysis

EcoEnergy, Journal Year: 2023, Volume and Issue: 1(2), P. 248 - 295

Published: Dec. 1, 2023

Abstract In the advancing world of graphene, highly anisotropic 2D semiconductor nanosheets, notable for their nanometer‐scale thickness, have emerged as a leading innovation, displaying immense potential in exploration renewable and clean energy production. These garnered significant attention from researchers. The nanosheets are marked by extraordinary electronic, optical, chemical attributes, positioning them attractive foundational components heterogeneous photocatalysts. This review diligently summarizes both seminal work ongoing developments pertaining to application solar within context photocatalysis. We begin detailing distinctive properties concentrating on pivotal roles augmenting photocatalytic efficiency, explaining intrinsic mechanisms that govern migration rate photogenerated carriers material's surface. Subsequently, we delineate methods employed synthesize typical nanosheets. alignment with overarching objective expanding light absorption capacity accelerating charge transfer, also examine current research hybridization techniques involving materials varied dimensions, well deployment diverse applications. conclude identifying promising avenues challenges await further this burgeoning field.

Language: Английский

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Realizing Photocatalytic Overall Water Splitting by Modulating the Thickness‐Induced Reaction Energy Barrier of Fluorenone‐Based Covalent Organic Frameworks

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(39)

Published: July 24, 2023

Direct photocatalytic hydrogen and oxygen evolution from water splitting is an attractive approach for producing chemical fuels. In this work, a novel fluorenone-based covalent organic framework (COF-SCAU-2) successfully exfoliated into ultrathin three-layer nanosheets (UCOF-SCAU-2) overall (OWS) under visible light. The structures of UCOF-SCAU-2 greatly enhance carrier separation, utilization efficiency, the exposure active surface sites. Surprisingly, exhibits efficient OWS performance, with rates reaching 0.046 0.021 mmol h-1 g-1 , respectively, visible-light irradiation, whereas bulk COF-SCAU-2 shows no activity OWS. Charge-carrier kinetic analysis DFT calculations confirm that reducing thickness COF increases number accessible sites, reduces distance charge migration, prolongs lifetimes photogenerated carriers, decreases Gibbs free energy rate-limiting step compared to nonexfoliated COFs. This work offers new insights effect layer COFs on

Language: Английский

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Mechanism of Particle-Mediated Inhibition of Demetalation for Single-Atom Catalytic Sites in Acidic Electrochemical Environments

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(28), P. 15528 - 15537

Published: July 10, 2023

Demetalation, caused by the electrochemical dissolution of metal atoms, poses a significant challenge to practical application single-atom catalytic sites (SACSs) in proton exchange membrane-based energy technologies. One promising approach inhibit SACS demetalation is use metallic particles interact with SACSs. However, mechanism underlying this stabilization remains unclear. In study, we propose and validate unified which can Fe Metal act as electron donors, decreasing oxidation state increasing density at FeN4 position, thereby strengthening Fe-N bond, inhibiting dissolution. Different types, forms, contents increase bond strength varying extents. A linear correlation between state, strength, amount supports mechanism. Our screening particle-assisted led 78% reduction dissolution, enabling continuous operation for up 430 h fuel cell. These findings contribute development stable SACSs applications.

Language: Английский

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Synergistic Interaction between Metal Single‐Atoms and Defective WO_3−x Nanosheets for Enhanced Sonodynamic Cancer Therapy

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(23)

Published: Feb. 27, 2024

Abstract Although metal single‐atom (SA)‐based nanomaterials are explored as sonosensitizers for sonodynamic therapy (SDT), they normally exhibit poor activities and need to combine with other therapeutic strategies. Herein, the deposition of SAs on oxygen vacancy (OV)‐rich WO 3− x nanosheets generate a synergistic effect efficient SDT is reported. Crystalline 3 OV‐rich first prepared by simple calcination ·H 2 O under an air N atmosphere, respectively. Pt, Cu, Fe, Co, Ni then deposited obtain SA‐decorated nanocomposites (M‐WO ). Importantly, Cu‐WO sonosensitizer exhibits much higher activity ultrasound (US)‐induced production reactive species than that Cu , which also M‐WO nanosheets. Both experimental theoretical results suggest excellent performance should be attributed between OVs. Therefore, after polyethylene glycol modification, can quickly kill cancer cells in vitro effectively eradicate tumors vivo US irradiation. Transcriptome sequencing analysis further molecular validation ‐mediated SDT‐activated apoptosis TNF signaling pathways potential drivers tumor induction.

Language: Английский

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Full‐Space Electric Field in Mo‐Decorated Zn₂In₂S₅ Polarization Photocatalyst for Oriented Charge Flow and Efficient Hydrogen Production

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(31)

Published: May 18, 2024

Integration of photocatalytic hydrogen (H

Language: Английский

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Single Atom Catalysts Based on Earth-Abundant Metals for Energy-Related Applications

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(21), P. 11767 - 11847

Published: July 5, 2024

Anthropogenic activities related to population growth, economic development, technological advances, and changes in lifestyle climate patterns result a continuous increase energy consumption. At the same time, rare metal elements frequently deployed as catalysts processes are not only costly view of their low natural abundance, but availability is often further limited due geopolitical reasons. Thus, electrochemical storage conversion with earth-abundant metals, mainly form single-atom (SACs), highly relevant timely technologies. In this review application SACs electrocatalytic chemicals fuels or products high content discussed. The oxygen reduction reaction also appraised, which primarily harnessed fuel cell technologies metal-air batteries. coordination, active sites, mechanistic aspects transition analyzed for two-electron four-electron pathways. Further, water splitting toward green hydrogen discussed terms evolution reaction. Similarly, production ammonia clean via nitrogen portrayed, highlighting potential single species.

Language: Английский

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Surface Engineered Single‐atom Systems for Energy Conversion

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(16)

Published: Jan. 10, 2024

Abstract Single‐atom catalysts (SACs) are demonstrated to show exceptional reactivity and selectivity in catalytic reactions by effectively utilizing metal species, making them a favorable choice among the different active materials for energy conversion. However, SACs still early stages of conversion, problems like agglomeration low conversion efficiency hampering their practical applications. Substantial research focus on support modifications, which vital SAC stability due intimate relationship between atoms support. In this review, category supports variety surface engineering strategies employed SA systems summarized, including site (heteroatom doping, vacancy introducing, groups grafting, coordination tunning) structure (size/morphology control, cocatalyst deposition, facet engineering, crystallinity control). Also, merits single‐atom systematically introduced. Highlights comprehensive summary discussions utilization surface‐engineered diversified applications photocatalysis, electrocatalysis, thermocatalysis, devices. At end potential obstacles using field discussed. This review aims guide rational design manipulation target‐specific capitalizing characteristic benefits engineering.

Language: Английский

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Enhancing Ni/Co Activity by Neighboring Pt Atoms in NiCoP/MXene Electrocatalyst for Alkaline Hydrogen Evolution

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(20)

Published: Feb. 27, 2024

Density functional theory (DFT) calculations demonstrate neighboring Pt atoms can enhance the metal activity of NiCoP for hydrogen evolution reaction (HER). However, it remains a great challenge to link and NiCoP. Herein, we introduced curvature bowl-like structure construct Pt/NiCoP interface by adding minimal 1 ‰-molar-ratio Pt. The as-prepared sample only requires an overpotential 26.5 181.6 mV accordingly achieve current density 10 500 mA cm

Language: Английский

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