Triggering nanoconfinement effect in advanced oxidation processes (AOPs) for boosted degradation of organic contaminants: A review

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 503, P. 158428 - 158428

Published: Dec. 9, 2024

Language: Английский

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Ni-incorporated N-doped graphitic carbon derived from pomegranate peel biowaste as an efficient OER and HER electrocatalyst for sustainable water splitting

FlatChem, Journal Year: 2024, Volume and Issue: 47, P. 100733 - 100733

Published: Sept. 1, 2024

Language: Английский

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Maximizing Surface Single-Ni Sites on Hollow Carbon Sphere for Efficient CO₂ Electroreduction

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(8), P. 3034 - 3043

Published: Feb. 13, 2024

Single-atom catalysts show great application potential due to their high catalytic efficiency but suffer from insufficient active site density and utilization. Herein, a robust single-atomic Ni catalyst anchored on porous hollow carbon spheres (Ni–N–HCS) was successfully synthesized via pyrolysis approach employing SiO2-templated HCS, dicyandiamide, Ni(CH3COO)2·4H2O as raw materials. Profiting the abundant (3.47 wt %) accessible single-Ni sites architecture, this showed superior performance for electrochemical CO2 reduction reaction in an H-type cell. A prominent Faradaic CO (95.04%) can be achieved at −0.70 V vs reversible hydrogen electrode (RHE) value even kept >80% over broad voltage range (−0.62 −0.87 RHE) with desirable current (10.88 mA·cm–2). In addition, FECO almost unchanged during continuous electrolysis 40 h. Significantly, Ni–N–HCS also exhibits excellent selectivity of >95% whole investigated window flow We believe work will provide new possibility build single-atom maximized utilization improving performance.

Language: Английский

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Synthesizing nickel single atom catalyst via SiO2 protection strategy for efficient CO2 electroreduction to CO in a wide potential range

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 675, P. 207 - 217

Published: July 2, 2024

Language: Английский

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Coordination-based synthesis of Fe single-atom anchored nitrogen-doped carbon nanofibrous membrane for CO2 electroreduction with nearly 100% CO selectivity

Chinese Chemical Letters, Journal Year: 2024, Volume and Issue: 35(12), P. 110031 - 110031

Published: May 20, 2024

Language: Английский

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Boosting Electrochemical CO₂ Reduction to CO by Regulating the Porous Structure of Carbon Membrane

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(19), P. 24823 - 24830

Published: May 6, 2024

Ni single-atom-decorated nitrogen-doped carbon materials (Ni-Nx-C) have demonstrated high efficiency in the electrochemical reduction of CO2 (CO2RR) to CO. In this study, Ni-Nx-C active sites were embedded within a membrane via an electrospinning and pyrolysis process. The resulting self-supported hosting could be directly utilized as electrode for CO2RR. To enhance CO2RR performance membrane, porous structure was fine-tuned by incorporating pore-forming agent. optimized electrode, K0.66-Ni-NC, achieved impressive CO faradaic (FECO) over 90% wide potential range from -0.8 -1.6 V vs RHE Additionally, it maintained FECO above at throughout 30 h durability test H-cell. Further analysis has revealed that not only facilitates mass transport but also increases level exposure during

Language: Английский

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Monitoring the in-situ Generated Ir1Sn Single Atom Alloy for Efficient CO2 Electroreduction via Rapid Freeze-Quench Mössbauer Spectroscopy

Materials Today Energy, Journal Year: 2025, Volume and Issue: unknown, P. 101901 - 101901

Published: May 1, 2025

Language: Английский

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Self-supporting nickel single atom catalyst derived from nickel metal organic framework for efficient electrocatalysis of CO2

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 178780 - 178780

Published: Jan. 1, 2025

Language: Английский

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Porous nitrogen-doped carbon anchored with highly dispersed nickel active sites for efficient carbon dioxide electroreduction

Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 112197 - 112197

Published: March 1, 2025

Language: Английский

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Constructing of Ni-Nx Active Sites in Self-Supported Ni Single-Atom Catalysts for Efficient Reduction of CO2 to CO

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(6), P. 473 - 473

Published: March 20, 2025

The electrochemical carbon dioxide reduction reaction (CO2RR) represents a promising approach for achieving CO2 resource utilization. Carbon-based materials featuring single-atom transition metal-nitrogen coordination (M-Nx) have attracted considerable research attention due to their ability maximize catalytic efficiency while minimizing metal atom usage. However, conventional synthesis methods often encounter challenges with particle agglomeration. In this study, we developed Ni-doped polyvinylidene fluoride (PVDF) fiber membrane via electrospinning, subsequently transformed into nitrogen-doped three-dimensional self-supporting Ni catalyst (Ni-N-CF) through controlled carbonization. PVDF was partially defluorinated and crosslinked, the single chain is changed reticulated structure, which ensured that structure did not collapse during carbonization effectively solved problem of runaway M-Nx composite in high-temperature pyrolysis process. Grounded X-ray photoelectron spectroscopy (XPS) absorption fine (XAFS), nitrogen coordinates nickel atoms form Ni-N keeps low oxidation state, thereby facilitating CO2RR. When applied CO2RR, Ni-N-CF demonstrated exceptional CO selectivity Faradaic (FE) 92%. unique architecture addressed traditional electrode instability issues caused by detachment. These results indicate tuning local atomically dispersed Ni, original inert sites can be activated efficient centers. This work provide new strategy designing high-performance catalysts structurally stable electrodes.

Language: Английский

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