Customizing the water-scarce, zinc ion-rich Helmholtz plane of a zinc anode for Ah-scale Zn metal batteries

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(20), P. 7850 - 7859

Published: Jan. 1, 2024

By constructing a hydrogel film doped with an ionic liquid on Zn anode, water-scarce inner Helmholtz plane and ion-enriched outer is developed, which effectively enables stable zinc anode for Ah-scale metal batteries.

Language: Английский

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Atomic Gap-State Engineering of MoS₂ for Alkaline Water and Seawater Splitting

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 11, 2025

Transition-metal dichalcogenides (TMDs), such as molybdenum disulfide (MoS2), have emerged a generation of nonprecious catalysts for the hydrogen evolution reaction (HER), largely due to their theoretical adsorption energy close that platinum. However, efforts activate basal planes TMDs primarily centered around strategies introducing numerous atomic vacancies, creating vacancy–heteroatom complexes, or applying significant strain, especially acidic media. These approaches, while potentially effective, present substantial challenges in practical large-scale deployment. Here, we report gap-state engineering strategy controlled activation S atom MoS2 through metal single-atom doping, effectively tackling both efficiency and stability alkaline water seawater splitting. A versatile synthetic methodology allows fabrication series single-metal atom-doped materials (M1/MoS2), featuring widely tunable densities with each dopant replacing Mo site. Among these (Mn1, Fe1, Co1, Ni1), Co1/MoS2 demonstrates outstanding HER performance media, overpotentials at mere 159 164 mV 100 mA cm–2, Tafel slopes 41 45 dec–1, respectively, which surpasses all reported TMD-based benchmark Pt/C during splitting, can be attributed an optimal modulation associated sulfur atoms. Experimental data correlating doping density identity performance, conjunction calculations, also reveal descriptor linked near-Fermi gap state modulation, corroborated by observed increase unoccupied 3p states.

Language: Английский

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Self‐Supported Super‐Hydrophilic Interconnected Nanospikes and Particles of MoS₂‐Ni₃S₂/NF with Optimum d‐Band Center for Anion Exchange Membrane Water Electrolyzer

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Abstract There is an imperative need for highly efficient electrocatalysts cost‐effective hydrogen production. Herein, a self‐supported, hybrid composite as bifunctional electrocatalyst introduced. This achieved by in situ growth of MoS 2 ‐Ni 3 S on nickel foam (NF), designated /NF, synthesized facile one‐step hydrothermal synthesis method. /NF exhibits low overpotentials only 187 and 146 mV OER HER, respectively, to achieve current density 10 mA cm −2 1 M KOH. The practical application the designed verified constructing || symmetrical membrane electrode assembly (MEA) 4 working area anion exchange water electrolyzer. system shows continuous electrolysis monitored 48 h duration. For OER, optimum d‐band center −1.66 eV heterostructure calculated from Density Functional Theory (DFT) studies. factors like unique structure electrocatalyst, enhanced hydrophilicity, improved electrochemically accessible number sites (ECASs), center, are expected be primary contributors system's performance. Thus, present finding unveils straightforward approach creating stable advancing commercial realm renewable electrochemical energy conversion.

Language: Английский

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Layered‐Hierarchical Dual‐Lattice Strain Suppresses Ni_xSe Surface Reconstruction for Stable OER in Alkaline Fresh/Seawater Splitting

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

Abstract Transition metal selenides (TMSe) are promising oxygen evolution reaction (OER) electrocatalysts but act as precursors rather than the actual active phase, transforming into amorphous oxyhydroxides during OER. This transformation, along with formation of selenium oxyanions and unstable heterointerfaces, complicates structure‐activity relationship reduces stability. work introduces novel “layered‐hierarchical dual lattice strain engineering” to inhibit surface reconstruction Ni x Se by modulating both nickel foam (NF) substrate Mo 2 N nanosheets (NM) nanorods‐nanosheets catalytic layer (NiSe‐Ni 0.85 Se‐NiO, NSN) ultrafast interfacial bimetallic NiFeOOH coating, achieving optimized NM/NSN/NiFeOOH configuration. The NM induces strain, enhancing OER activity improving electron transport adhesion, while coating additional mitigating oxidative degradation, reinforcing structural integrity. catalyst demonstrates exceptional performance low overpotentials 208 mV@10 mA cm −2 outstanding stability over 100 h at in alkaline freshwater seawater. Theoretical analysis shows that effectively prevents degradation preserving sites for optimal intermediate interactions stabilizing electronic environment. provides a strategy TMSe beyond.

Language: Английский

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Bubbles Management for Enhanced Catalytic Water Splitting Performance

Catalysts, Journal Year: 2024, Volume and Issue: 14(4), P. 254 - 254

Published: April 11, 2024

Water splitting is widely acknowledged as an efficient method for hydrogen production. In recent years, significant research efforts have been directed towards developing cost-effective electrocatalysts. However, the management of bubbles formed on electrode surface during electrolysis has largely overlooked. These can impede active sites, resulting in decreased catalytic performance and stability, especially at high current densities. Consequently, this impediment affects energy conversion efficiency water splitting. To address these challenges, review offers a comprehensive overview advanced strategies aimed improving mitigating obstructive effects primarily involve utilization experimental apparatus to observe bubble-growth behavior, encompassing nucleation, growth, detachment stages. Moreover, examines factors influencing bubble formation, considering both mechanical behaviors internal factors. Additionally, design water-splitting catalysts discussed, focusing modifying electrode-surface characteristics. Finally, concludes by summarizing potential large-scale industrial production identifying future directions achieving

Language: Английский

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Enhancing Reversibility and Stability of Mg Metal Anodes: High‐Exposure (002) Facets and Nanosheet Arrays for Superior Mg Plating/Stripping

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(37)

Published: June 27, 2024

Abstract Magnesium metal batteries (MMBs), recognized as promising contenders for post‐lithium battery technologies, face challenges such uneven magnesium (Mg) plating and stripping behaviors, leading to uncontrollable dendrite growth irreversible structural damage. Herein, we have developed a Mg foil featuring prominently exposed (002) facets an architecture of nanosheet arrays (termed (002)‐Mg), created through one‐step acid etching method. Specifically, the prominent exposure facets, known their inherently low surface adsorption energies with atoms, not only facilitates smooth nucleation dense deposition but also significantly mitigates side reactions on anode. Moreover, evenly distribute electric field ion flux, enhancing transfer kinetics. As result, fabricated (002)‐Mg electrodes exhibit unprecedented long‐cycle performance, lasting over 6000 h (>8 months) at current density 3 mA cm −2 capacity mAh . Furthermore, corresponding pouch cells equipped various electrolytes cathodes demonstrate remarkable cycling stability, highlighting superior electrochemical compatibility electrode. This study provides new insights into advancement durable MMBs by modifying crystal structure morphology Mg.

Language: Английский

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NiFe‐Based Electrocatalysts for Alkaline Oxygen Evolution: Challenges, Strategies, and Advances Toward Industrial‐Scale Deployment

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 2, 2024

Abstract Developing high‐efficiency alkaline water splitting technology holds great promise in potentially revolutionizing the traditional petrochemical industry to a more sustainable hydrogen economy. Importantly, oxygen evolution reaction (OER) accompanied at anode is considered as critical bottleneck terms of both complicated mechanism and sluggish kinetics, requiring rational design OER electrocatalysts elucidate structure‐performance relationship reduce applied overpotential. As benchmarked non‐precious metal candidate, NiFe‐based have gained enormous attention due low‐cost, earth‐abundance, remarkable intrinsic activity, which are expected be implemented industrial splitting. In this contribution, comprehensive overview provided, starting with fundamental mechanisms, evaluation metrics, synthetic protocols. Subsequently, basic principles corresponding regulatory strategies summarized following sequence substrate‐catalyst‐electrolyte efficient robust toward industrial‐scale deployment. Perspectives on remaining challenges instructive opportunities booming field finally discussed.

Language: Английский

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Metal organic framework derived N, P co-doped carbon coated Mo2C-Co6Mo6C hetero-structural nano bowl for efficiency overall water splitting

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: unknown, P. 176709 - 176709

Published: Sept. 1, 2024

Language: Английский

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A synergistic coordination-reduction interface for electrochemical reductive extraction of uranium with low impurities from seawater

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Feb. 27, 2025

Electrochemical extraction of uranium from seawater is a promising strategy for the sustainable supply nuclear fuel, whereas current progress suffers co-deposition impurities. Herein, we construct synergistic coordination-reduction interface in CMOS@NSF, achieving electrochemical black UO2 product seawater. The internal sulfur CoMoOS tailors electron distribution, resulting accumulation terminal O sites strong uranyl binding. Meanwhile, interfacial connection with Ni3S2 accelerates transfer and promoted reductive properties. Such ensures formation preservation tetravalent uranium, preventing alkalis crystalline transformation. From natural seawater, CMOS@NSF exhibits an capacity 2.65 mg g−1 d−1 solid products as final products. This work provides efficient low Guo et al interface,

Language: Английский

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Synergistic adsorption and removal of nitrate in an electrically polarized column packed with AlCl3-modified activated carbon

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132570 - 132570

Published: March 1, 2025

Language: Английский

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