Graphitic carbon nitride (g-C₃N₄) based heterogeneous single atom catalysts: synthesis, characterisation and catalytic applications

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(16), P. 8599 - 8646

Published: Jan. 1, 2023

The ease of anchoring single atoms on the g-C 3 N 4 matrix, through its abundant nitrogen sites, facilitates a variety atom catalysts for applications in multiple domains catalysis.

Language: Английский

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Advances of carbon nitride based atomically dispersed catalysts from single-atom to dual-atom in advanced oxidation process applications

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 505, P. 215693 - 215693

Published: Jan. 30, 2024

Language: Английский

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From catalyst development to reactor Design: A comprehensive review of methanol synthesis techniques

Energy Conversion and Management, Journal Year: 2024, Volume and Issue: 302, P. 118070 - 118070

Published: Jan. 20, 2024

Language: Английский

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A review on sustainable iron oxide nanoparticles: syntheses and applications in organic catalysis and environmental remediation

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(13), P. 7579 - 7655

Published: Jan. 1, 2024

In this review paper, recent developments of iron oxide nanoparticles are highlighted and discussed in the field organic catalysis environmental remediation.

Language: Английский

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General negative pressure annealing approach for creating ultra-high-loading single atom catalyst libraries

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: July 6, 2024

Abstract Catalyst systems populated by high-density single atoms are crucial for improving catalytic activity and selectivity, which can potentially maximize the industrial prospects of heterogeneous single-atom catalysts (SACs). However, achieving high-loading SACs with metal contents above 10 wt% remains challenging. Here we describe a general negative pressure annealing strategy to fabricate ultrahigh-loading up 27.3–44.8 13 different metals on typical carbon nitride matrix. Furthermore, our approach enables synthesis high-entropy (HESACs) that exhibit coexistence multiple high contents. In-situ aberration-corrected HAADF-STEM (AC-STEM) combined ex-situ X-ray absorption fine structure (XAFS) demonstrate treatment accelerates removal anionic ligand in precursors boosts bonding species N defective sites, enabling formation dense N-coordinated sites. Increasing loading platinum (Pt) SAC 41.8 significantly enhances propane oxidation towards liquid products, including acetone, methanol, acetic acid et al. This work presents straightforward universal many low-cost efficient transformations.

Language: Английский

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Pt Single Atoms on TiO₂ Can Catalyze Water Oxidation in Photoelectrochemical Experiments

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(24), P. 16363 - 16368

Published: June 6, 2024

Photoelectrochemical water splitting on n-type semiconductors is highly dependent catalysis of the rate-determining reaction O2 evolution. Conventionally, in electrochemistry and photoelectrochemistry evolution catalyzed by metal oxide catalysts like IrO2 RuO2, whereas noble metals such as Pt are considered unsuitable for this purpose. However, our study finds that Pt, its single-atom form, exhibits exceptional cocatalytic properties photoelectrochemical oxidation a TiO2 photoanode, contrast to nanoparticle form. The decoration single atoms onto yields remarkable current density 5.89 mA cm–2 at 1.23 VRHE, surpassing bare (or decorated TiO2) 2.52 times. Notably, enhancement remains consistent over wide pH range. By accompanying theoretical work, we assign significant an improved charge transfer separation efficiency along with accelerated kinetics oxygen facilitated presence surface.

Language: Английский

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M-N-C-based single-atom catalysts for H2, O2 & CO2 electrocatalysis: activity descriptors, active sites identification, challenges and prospects

Fuel, Journal Year: 2021, Volume and Issue: 304, P. 121420 - 121420

Published: July 16, 2021

Language: Английский

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Electron-Rich Ruthenium Single-Atom Alloy for Aqueous Levulinic Acid Hydrogenation

ACS Catalysis, Journal Year: 2021, Volume and Issue: 11(19), P. 12146 - 12158

Published: Sept. 15, 2021

Modulation of the electronic structure metal-based catalysts proves to be useful for optimizing catalytic activity. However, precise modulation at atomic scale remains challenging, because invariant single atoms and difficulty in achieving size limit tailored alloy particles. Herein, we report a RuCo single-atom (SAA) catalyst with precisely electron-rich Ru confined into Co lattice, skillfully fabricated by pyrolysis Ru-containing ZIF-67 tuned feed content. The SAAs is well investigated various characterization techniques, including aberration-corrected scanning transmission electron microscopy, high-energy X-ray diffraction, photoelectron spectroscopy, absorption fine structure. It found that more are active toward aqueous levulinic acid (LA) hydrogenation γ-valerolactone, delivering an extremely large turnover frequency value 3500 h–1, 27 fold higher than over state-of-art 5 wt % Ru/C much those electron-deficient alloyed Combined experimental investigation computational modeling reveal remarkable activity originates from intrinsic SAA site which boosts C═O/H2 adsorption H2 dissociation H especially facilitates γ-C LA hydrogenation, rate-determining step hydrogenation. This study will shed light on tailoring also provides insight development biomass conversion.

Language: Английский

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Air Electrodes for Flexible and Rechargeable Zn−Air Batteries

Small Structures, Journal Year: 2021, Volume and Issue: 3(1)

Published: Oct. 1, 2021

Rechargeable Zn−air batteries (ZABs) have attracted increasing attention as one of the most promising future energy power sources due to their relatively high specific density, environmental friendliness, safety, and low cost. In particular, flexible ZABs are desirable for portable wearable electronic devices, in which cathode can utilize air directly from atmosphere with significantly enhanced density. Therefore, electrode consisting oxygen electrocatalysts is critical component ZABs, governing overall battery performance This review highlights recent achievements designing efficient electrodes rechargeable ZABs. First, significant innovations configurations improve flexibility introduced. Then, developed fabricating high‐performance cathodes terms catalyst properties, unique nanostructures, morphologies emphasized. Furthermore, effective architectures discussed highlight structural stability charge/mass transports improving performance. Finally, a perspective durable high‐power provided, aiming summarize current challenges possible solutions commercialize exciting technology eventually.

Language: Английский

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Progress in batch preparation of single-atom catalysts and application in sustainable synthesis of fine chemicals

Green Chemistry, Journal Year: 2021, Volume and Issue: 23(22), P. 8754 - 8794

Published: Jan. 1, 2021

The batch preparation technology and the thermo-catalysis application of SACs in fine chemical industries are highlighted.

Language: Английский

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