NiMo-based alloy and its sulfides for energy-saving hydrogen production via sulfion oxidation assisted alkaline seawater splitting

Chinese Chemical Letters, Год журнала: 2025, Номер unknown, С. 110861 - 110861

Опубликована: Янв. 1, 2025

Язык: Английский

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Coupling Nitrate‐to‐Ammonia Conversion and Sulfion Oxidation Reaction Over Hierarchical Porous Spinel MFe₂O₄ (M═Ni, Co, Fe, Mn) in Wastewater

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 7, 2025

The construction of coupled electrolysis systems utilizing renewable energy sources for electrocatalytic nitrate reduction and sulfion oxidation reactions (NO3RR SOR), is considered a promising approach environmental remediation, ammonia production, sulfur recovery. Here, simple chemical dealloying method reported to fabricate hierarchical porous multi-metallic spinel MFe2O4 (M═Ni, Co, Fe, Mn) dual-functional electrocatalysts consisting Mn-doped NiFe2O4/CoFe2O4 heterostructure networks Ni/Co/Mn co-doped Fe3O4 nanosheet networks. excellent NO3RR with high NH3 Faradaic efficiency 95.2% at -0.80 V versus reversible hydrogen electrode (vs RHE) yield rate 608.9 µmol h-1 cm-2 -1.60 vs RHE, impressive SOR performance (100 mA [email protected] achieved MFe2O4. Key intermediates such as *NO, *NH2, are identified in the process by situ Fourier transform infrared spectroscopy (in FTIR). MFe2O4-assembled two-electrode coupling system (NO3RR||SOR) shows an ultra-low cell voltage 1.14 10 cm-2, much lower than NO3RR||OER (oxygen evolution reaction, [email protected] V), simultaneously achieving two expected targets value-added generation recovery, also demonstrating durability 18 h. This work demonstrates great potential ferrite-based catalysts remediation.

Язык: Английский

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Sustainability assessment of seawater splitting: Prospects, challenges, and future directions

EcoEnergy, Год журнала: 2024, Номер unknown

Опубликована: Окт. 10, 2024

Abstract Seawater splitting is one of the desirable techniques for producing green hydrogen from vast natural resource. Several reports about designing and fabricating efficient electrocatalysts to boost oxygen evolution reaction have been published. However, they mainly focus on electrodes, electrocatalysts, cost, system stability. This article presents an overview seawater by highlighting most challenging issues that complicate electrolysis, such as durability, guide future research in this important area. The strategy launch life cycle assessments described evaluate short long‐term impacts. Finally, current challenges prospective solutions are discussed.

Язык: Английский

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Quantum-sized CoP nanodots with rich vacancies: Enhanced hydrazine oxidation, hydrazine-assisted water splitting, and Zn-hydrazine battery performance through interface modulation

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 680, С. 214 - 223

Опубликована: Ноя. 16, 2024

Язык: Английский

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Highly graphitized nitrogen-doped ordered mesoporous carbon supported Ni nanocrystals for efficient hydrazine-assisted CO2 splitting

Journal of Materials Chemistry A, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 26, 2024

An efficient nanoscale Ni-based catalyst enabled the energy-efficient coupling of HzOR with CO 2 RR for production.

Язык: Английский

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Carbon Nanosheet-Supported Ag/CoO Catalysts for Efficient CO₂ Reduction

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Янв. 24, 2025

Язык: Английский

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Turn the Harm into A Benefit: Axial Cl Adsorption on Curved Fe‐N₄ Single Sites for Boosted Oxygen Reduction Reaction in Seawater

Small, Год журнала: 2025, Номер unknown

Опубликована: Фев. 26, 2025

Abstract Seawater electrocatalysis is urgently needed for various energy storage and conversion systems. However, the adsorption of chloride ions (Cl − ) to active sites can degrade oxygen reduction reaction (ORR) activity stability, thus reducing catalytic performance. In this paper, a curved FeN 4 single atomic structure designed by utilizing curvature engineering, which turns harmful Cl into benefit on Fe site that changes rate determining step ORR reduces overall barrier according density functional theory (DFT) calculation. Experimental studies reveal prepared highly‐curved single‐atom iron catalyst (HC‐Fe SA exhibits excellent in different electrolytes, with half‐wave potentials 0.90 V 0.1 M KOH, simulated seawater, 0.75 natural respectively. This work opens up an avenue synthesis high‐performance seawater‐based catalysts through regulating local curvature.

Язык: Английский

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Toward unlocking the potential of aqueous Zn-CO2 batteries: What factors affect the electrochemical performance?

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161736 - 161736

Опубликована: Март 1, 2025

Язык: Английский

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Atomic-Level Co/Mesoporous Carbon Nanofibers for Efficient Electrochemical H₂O₂ Production

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

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Turning the Selectivity of CO Electroreduction from Acetate to Ethanol by Alloying FCC-Phased Cu with Atomically Dispersed Mn Atoms

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Апрель 10, 2025

The predominant product of CO electroreduction (COER) is often acetate, with the Faradaic efficiency (FE) for ethanol usually falling below 50%. Herein, we propose a unique strategy to enhance selectivity in COER, shifting it from acetate predominance toward generation via alloying atomic manganese (Mn) atoms face-centered cubic (FCC) copper (Cu) catalyst. By optimizing ratio Mn Cu, observe an impressive enhancement 8.8-fold ethanol-to-acetate FE optimal Mn3Cu97 alloy compared unalloyed FCC-phase Cu. demonstrates remarkable nearly 70% at high current density 600 mA cm-2 membrane electrode assembly electrolyzer. Further theoretical analysis reveals that atomically dispersed generate synergistic active sites and modulate adsorption strength critical intermediates relevant synthesis, thereby facilitating transition pathway pathway.

Язык: Английский

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