Construction of ZnIn₂S₄–In₂O₃ Hierarchical Tubular Heterostructures for Efficient CO₂ Photoreduction

Journal of the American Chemical Society, Journal Year: 2018, Volume and Issue: 140(15), P. 5037 - 5040

Published: March 29, 2018

We demonstrate the rational design and construction of sandwich-like ZnIn2S4-In2O3 hierarchical tubular heterostructures by growing ZnIn2S4 nanosheets on both inner outer surfaces In2O3 microtubes as photocatalysts for efficient CO2 photoreduction. The unique integrates into one-dimensional (1D) open architectures with double-heterojunction shells ultrathin two-dimensional (2D) nanosheet subunits. This accelerates separation transfer photogenerated charges, offers large surface area adsorption, exposes abundant active sites catalysis. Benefiting from structural compositional merits, optimized photocatalyst exhibits outstanding performance reductive deoxygenation considerable CO generation rate (3075 μmol h-1 g-1) high stability.

Language: Английский

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Nitrogen‐Coordinated Single Cobalt Atom Catalysts for Oxygen Reduction in Proton Exchange Membrane Fuel Cells

Advanced Materials, Journal Year: 2018, Volume and Issue: 30(11)

Published: Jan. 24, 2018

Due to the Fenton reaction, presence of Fe and peroxide in electrodes generates free radicals causing serious degradation organic ionomer membrane. Pt-free Fe-free cathode catalysts therefore are urgently needed for durable inexpensive proton exchange membrane fuel cells (PEMFCs). Herein, a high-performance nitrogen-coordinated single Co atom catalyst is derived from Co-doped metal-organic frameworks (MOFs) through one-step thermal activation. Aberration-corrected electron microscopy combined with X-ray absorption spectroscopy virtually verifies CoN4 coordination at an atomic level catalysts. Through investigating effects doping contents activation temperature, atomically site dispersed optimal chemical structural properties has achieved respectable activity stability oxygen reduction reaction (ORR) challenging acidic media (e.g., half-wave potential 0.80 V vs reversible hydrogen electrode (RHE). The performance comparable Fe-based 60 mV lower than Pt/C -60 μg Pt cm-2 ). Fuel cell tests confirm that can translate cathodes PEMFCs. remarkably enhanced ORR attributed well-dispersed active sites embedded 3D porous MOF-derived carbon particles, omitting any inactive aggregates.

Language: Английский

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Metal-organic frameworks and their derived materials for electrochemical energy storage and conversion: Promises and challenges

Science Advances, Journal Year: 2017, Volume and Issue: 3(12)

Published: Dec. 1, 2017

Metal-organic frameworks and their derived materials are highly interesting for electrochemical energy storage conversion.

Language: Английский

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Nanostructured Conversion-type Anode Materials for Advanced Lithium-Ion Batteries

Chem, Journal Year: 2018, Volume and Issue: 4(5), P. 972 - 996

Published: Feb. 8, 2018

Language: Английский

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New Strategies for Novel MOF-Derived Carbon Materials Based on Nanoarchitectures

Chem, Journal Year: 2019, Volume and Issue: 6(1), P. 19 - 40

Published: Oct. 14, 2019

Language: Английский

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Formation of Hierarchical In₂S₃–CdIn₂S₄ Heterostructured Nanotubes for Efficient and Stable Visible Light CO₂ Reduction

Journal of the American Chemical Society, Journal Year: 2017, Volume and Issue: 139(48), P. 17305 - 17308

Published: Nov. 8, 2017

We demonstrate rational design and fabrication of hierarchical In2S3-CdIn2S4 heterostructured nanotubes as efficient stable photocatalysts for visible light CO2 reduction. The novel self-templated strategy, including sequential anion- cation-exchange reactions, integrates two distinct sulfide semiconductors into tubular hybrids with homogeneous interfacial contacts ultrathin two-dimensional (2D) nanosheet subunits. Accordingly, the facilitate separation migration photoinduced charge carriers, enhance adsorption concentration molecules, offer rich active sites surface redox reactions. Benefiting from these structural compositional features, optimized without employing noble metal cocatalysts in catalytic system manifest remarkable performance deoxygenative reduction high CO generation rate (825 μmol h–1 g–1) outstanding stability under irradiation.

Language: Английский

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Metal–organic frameworks as a platform for clean energy applications

EnergyChem, Journal Year: 2020, Volume and Issue: 2(2), P. 100027 - 100027

Published: Jan. 22, 2020

Language: Английский

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Interface-Assisted Synthesis of 2D Materials: Trend and Challenges

Chemical Reviews, Journal Year: 2018, Volume and Issue: 118(13), P. 6189 - 6235

Published: June 18, 2018

The discovery of graphene one decade ago has triggered enormous interest in developing two-dimensional materials (2DMs)—that is 2D allotropes various elements or compounds (consisting two more covalently bonded elements) molecular frameworks with periodic structures. At present, synthesis strategies have been exploited to produce 2DMs, such as top-down exfoliation and bottom-up chemical vapor deposition solution methods. In this review article, we will highlight the interfacial roles toward controlled inorganic organic 2DMs varied structural features. We summarize state-of-the-art progress on address their advancements structural, morphological, crystalline control by direction arrangement molecules precursors at a confined space. First, provide an overview interfaces introduce advantages uniqueness for followed brief classification achieved synthesis. Next, currently developed combined representative are summarized, including description method details, corresponding features, insights into limitations methods, along some recommendable characterization methods understanding assembly crystal growth 2DMs. After that, discuss several classes emerging particular emphasis strategies. Note not be categorized separately due fact that number articles covered synthesis, structure, processing, applications. Finally, challenges perspectives provided regarding future development interface-assisted diverse functional control.

Language: Английский

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Ultrafine Co Nanoparticles Encapsulated in Carbon‐Nanotubes‐Grafted Graphene Sheets as Advanced Electrocatalysts for the Hydrogen Evolution Reaction

Advanced Materials, Journal Year: 2018, Volume and Issue: 30(30)

Published: June 10, 2018

The rational design of an efficient and inexpensive electrocatalyst based on earth-abundant 3d transition metals (TMs) for the hydrogen evolution reaction still remains a significant challenge in renewable energy area. Herein, novel effective approach is developed synthesizing ultrafine Co nanoparticles encapsulated nitrogen-doped carbon nanotubes (N-CNTs) grafted onto both sides reduced graphene oxide (rGO) (Co@N-CNTs@rGO) by direct annealing GO-wrapped core-shell bimetallic zeolite imidazolate frameworks. Benefiting from uniform distribution nanoparticles, in-situ-formed highly graphitic N-CNTs@rGO, large surface area, abundant porosity, as-fabricated Co@N-CNTs@rGO composites exhibit excellent electrocatalytic (HER) activity. As demonstrated electrochemical measurements, can achieve 10 mA cm-2 at low overpotential with only 108 87 mV 1 m KOH 0.5 H2 SO4 , respectively, much better than most reported Co-based electrocatalysts over wide pH range. More importantly, synthetic strategy versatile be extended to prepare other binary or even ternary TMs@N-CNTs@rGO (e.g., Co-Fe@N-CNTs@rGO Co-Ni-Cu@N-CNTs@rGO). here may open new avenue toward development nonprecious high-performance HER catalysts.

Language: Английский

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Single atom electrocatalysts supported on graphene or graphene-like carbons

Chemical Society Reviews, Journal Year: 2019, Volume and Issue: 48(20), P. 5207 - 5241

Published: Jan. 1, 2019

Electrocatalysis plays an essential role in diverse electrochemical energy conversion processes that are vital for improving utilization efficiency and mitigating the aggravating global warming challenge. The noble metals such as platinum generally most frequently used electrocatalysts to drive these reactions facilitate relevant processes. high cost scarcity of materials pose a serious challenge wide-spread adoption sustainability technologies long run, which have motivated considerable efforts searching alternative with reduced loading precious or based entirely on earth-abundant metals. Of particular interest graphene-supported single atom catalysts (G-SACs) integrate merits heterogeneous homogeneous catalysts, activity, selectivity, stability, maximized easy separation from reactants/products. graphene support features large surface area, conductivity excellent (electro)-chemical making it highly attractive substrate supporting various In this review, we highlight recent advancements G-SACs conversion, synthetic strategies identification atomistic structure electrocatalytic applications variety reactions, finally conclude brief prospect future challenges opportunities.

Language: Английский

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