A restricted dynamic surface self-reconstruction toward high-performance of direct seawater oxidation

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 20, 2024

Abstract The development of highly efficient electrocatalysts for direct seawater splitting with bifunctionality inhibiting anodic oxidation reconstruction and selective oxygen evolution reactions is a major challenge. Herein, we report electrocatalyst that achieves long-term stability more than 1000 h at 600 mA/cm 2 @η high selectivity (Faraday efficiency 100%). This catalyst revolves an amorphous molybdenum oxide layer constructed on the beaded-like cobalt interface by atomic deposition technology. As demonstrated, new restricted dynamic surface self-reconstruction mechanism induced formation stable reconstructed Co-Mo double hydroxide phase layer. device assembled into two-electrode flow cell overall electrolysis maintained 1 A/cm @1.93 V 500 Faraday higher 95%. Hydrogen generation rate reaches 419.4 mL/cm /h, power consumption (4.62 KWh/m 3 H ) lower pure water (5.0 industrial current density.

Язык: Английский

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Designing 3d Transition Metal Cation-Doped MRuO_x As Durable Acidic Oxygen Evolution Electrocatalysts for PEM Water Electrolyzers

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(22), С. 15515 - 15524

Опубликована: Май 24, 2024

The continuous dissolution and oxidation of active sites in Ru-based electrocatalysts have greatly hindered their practical application proton exchange membrane water electrolyzers (PEMWE). In this work, we first used density functional theory (DFT) to calculate the energy Ru 3d transition metal-doped MRuOx (M = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn) evaluate stability for acidic oxygen evolution reaction (OER) screen out ZnRuOx as best candidate. To confirm theoretical predictions, experimentally synthesized these materials found that indeed displays robust OER with a negligible decay η10 after 15 000 CV cycles. Of importance, using anode, PEMWE can run stably 120 h at 200 mA cm–2. We also further uncover mechanism ZnRuOx, i.e., Zn atoms doped outside nanocrystal would form "Zn-rich" shell, which effectively shortened average Ru–O bond lengths strengthen interaction therefore boosted intrinsic OER. short, work not only provides new study paradigm DFT calculations guide experimental synthesis but offers proof-of-concept metal dopants RuO2 stabilizer universal principle develop high-durability catalysts PEMWE.

Язык: Английский

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Heterostructured electrocatalysts for the oxygen evolution reaction

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(30), С. 18832 - 18865

Опубликована: Янв. 1, 2024

This review focuses mainly on the overall facilitating effect of heterostructures OER process. The fabrication heterostructured electrocatalysts and relationship between their structures electrocatalytic properties are discussed.

Язык: Английский

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Unveiling the Role of Surface Self‐Reconstruction of Metal Chalcogenides on Electrocatalytic Oxygen Evolution Reaction

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 10, 2024

Abstract Transition metal chalcogenides are an important class of electrocatalysts with broad application prospects in alkaline oxygen evolution reactions. Many researchers focusing on the situ conversion cations catalysts, but have rarely considered contribution oxidation, leaching, and re‐absorption to catalytic activity. Herein, multiple characterization approaches used monitor mechanism origin CoTe@CoS‐electrocatalyzed reaction (OER) The research results reveal that electro‐oxidative dissolution Te S electrode surface forms TeO 3 2− SO , which adsorbed surface. Moreover, species will further transform into 4 . As expected, extra addition mixed tellurite sulfate ions Co (OH) 2 electrolyte produces a synergistic effect can significantly boost OER Selenites analogous effect, indicating adsorption chalcogenates has universal improving performance. findings this work provide unique insights materials enhancing activity during processes.

Язык: Английский

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Iron Molybdenum Sulfide‐Supported Ultrafine Ru Nanoclusters for Robust Sulfion Degradation‐Assisted Hydrogen Production

Advanced Functional Materials, Год журнала: 2024, Номер 34(27)

Опубликована: Март 5, 2024

Abstract Electrocatalytic hydrogen evolution and (S 2− ) recycling present promising strategies for cost‐effective production simultaneous removal of environmental pollutants. However, the advancement this technology is hindered by limited availability affordable, efficient, stable catalysts. Herein, study synthesizes ultrafine ruthenium (Ru) nanoclusters on a substrate iron molybdenum sulfide (FeMo‐S) nanosheets, creating new heterointerface catalyst (FeMo‐S/Ru) reaction (HER) sulfion oxidation (SOR). Experimental theoretical calculations suggest that strong electron interactions between Ru FeMo‐S substrate, optimizing *H adsorption promoting HER activity one side while facilitating sulfur intermediates other side, effectively catalyzing SOR. Additionally, assembled electrocatalytic coupling system with FeMo‐S/Ru displays an ultralow cell voltage 0.57 V at 100 mA cm −2 , achieving high Faradaic efficiencies (>96%) H 2 production, also exhibiting remarkable durability over 1 month (838 h). This work paves way development highly efficient durable supported catalysts, enabling energy‐saving environmentally friendly recycling.

Язык: Английский

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Zipper‐Like Interlocked Heterostructure of NiFe Layered Double Hydroxide‐WN for Super‐Stable Oxygen Evolution over 4500 h

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 22, 2024

Abstract The nickel‐iron based materials are widely studied as excellent oxygen evolution reaction (OER) electrocatalysts. However, its relatively poor OER stability limits practical applications. Herein, a zipper‐like interlocked heterostructure of NiFe layered double hydroxide (LDH)‐WN is constructed. LDH‐WN exhibits not only ultrahigh activity 228 mV overpotential at current density 50 mA cm −2 , but also extremely long‐term over 4500 h and 550 an industrial ≈350 which ascribed to special structure. Moreover, in situ Raman confirms that the presence WN can efficiently achieve LDH reconstruction slower metal dissolution during OER, therefore boosts stability. DFT calculations reveal increase *O adsorption capability conductivity layer, anchor atoms layer improve energy barrier. In short, this work presents new method constructing Ni‐Fe‐based catalysts, would accelerate application.

Язык: Английский

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Research progress of the porous membranes in alkaline water electrolysis for green hydrogen production

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159291 - 159291

Опубликована: Янв. 1, 2025

Язык: Английский

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Recent achievements in noble metal-based oxide electrocatalysts for water splitting

Materials Horizons, Год журнала: 2025, Номер 12(6), С. 1757 - 1795

Опубликована: Янв. 1, 2025

Noble metal-based oxide electrocatalysts are essential for the development of H 2 production technology by water electrolysis, and this review summarises recent research progress noble metal oxides in field electrolysis.

Язык: Английский

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Proton Exchange Membrane Water Splitting: Advances in Electrode Structure and Mass‐Charge Transport Optimization

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 4, 2025

Abstract Proton exchange membrane water electrolysis (PEMWE) represents a promising technology for renewable hydrogen production. However, the large‐scale commercialization of PEMWE faces challenges due to need acid oxygen evolution reaction (OER) catalysts with long‐term stability and corrosion‐resistant electrode assemblies (MEA). This review thoroughly examines deactivation mechanisms acidic OER crucial factors affecting assembly instability in complex environments, including catalyst degradation, dynamic behavior at MEA triple‐phase boundary, equipment failures. Targeted solutions are proposed, improvements, optimized designs, operational strategies. Finally, highlights perspectives on strict activity/stability evaluation standards, situ/operando characteristics, practical electrolyzer optimization. These insights emphasize interrelationship between catalysts, MEAs, activity, stability, offering new guidance accelerating systems.

Язык: Английский

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Phase‐Engineered Bi‐RuO₂ Single‐Atom Alloy Oxide Boosting Oxygen Evolution Electrocatalysis in Proton Exchange Membrane Water Electrolyzer

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

Abstract Engineering nanomaterials at single‐atomic sites can enable unprecedented catalytic properties for broad applications, yet it remains challenging to do so on RuO 2 ‐based electrocatalysts proton exchange membrane water electrolyzer (PEMWE). Herein, the rational design and construction of Bi‐RuO single‐atom alloy oxide (SAAO) are presented boost acidic oxygen evolution reaction (OER), via phase engineering a novel hexagonal close packed ( hcp ) RuBi alloy. This SAAO electrocatalyst exhibits low overpotential 192 mV superb stability over 650 h 10 mA cm −2 , enabling practical PEMWE that needs only 1.59 V reach 1.0 A under industrial conditions. Operando differential electrochemical mass spectroscopy analysis, coupled with density functional theory studies, confirmed adsorbate‐evolving mechanism incorporation Bi 1 improves activity by electronic optimization hindering surface Ru demetallation. work not introduces new strategy fabricate high‐performance atomic‐level, but also demonstrates their potential use in electrolyzers.

Язык: Английский

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