Rapid Synthesis of Carbon‐Supported Ru‐RuO₂ Heterostructures for Efficient Electrochemical Water Splitting

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

Abstract Development of high‐performance electrocatalysts for water splitting is crucial a sustainable hydrogen economy. In this study, rapid heating ruthenium(III) acetylacetonate by magnetic induction (MIH) leads to the one‐step production Ru‐RuO₂/C nanocomposites composed closely integrated Ru and RuO₂ nanoparticles. The formation Mott‐Schottky heterojunctions significantly enhances charge transfer across Ru‐RuO 2 interface leading remarkable electrocatalytic activities toward both evolution reaction (HER) oxygen (OER) in 1 m KOH. Among series, sample prepares at 300 A 10 s exhibits best performance, with an overpotential only −31 mV HER +240 OER reach current density mA cm⁻ . Additionally, catalyst demonstrates excellent durability, minimal impacts electrolyte salinity. With as bifunctional catalysts overall splitting, ultralow cell voltage 1.43 V needed , 160 lower than that commercial 20% Pt/C RuO₂/C mixture. These results highlight significant potential MIH ultrafast synthesis electrochemical from seawater.

Language: Английский

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Design and synthesis of autogenous growth NiFe bimetallic phosphide catalysts on a nickel iron foam-like substrate for efficient overall water splitting

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 684, P. 355 - 366

Published: Jan. 8, 2025

Language: Английский

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Accelerating the Transformation of Active β‐NiOOH on NiFe Layered Double Hydroxide via Cation–anion Collaborative Coordination for Alkaline Water Oxidation at High Current Densities

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract The NiFe‐based layered double hydroxides (LDH) undergo surface reconstruction, generating metal hydroxyl oxides that act as active species during the alkaline oxygen evolution reaction (OER). However, sluggish reconstruction process and excessive oxidation at higher anodic potentials frustrate OER activity stability. Herein, a cation–anion collaborative coordination strategy is harnessed to build (Ni, Fe)─S─Zn structures in NiFe LDH on nickel foam (S‐NiFeZn LDH/NF), which lowers energy barrier aids forming highly β‐NiOOH process. Meanwhile, also optimize adsorption of oxygen‐containing intermediates, enhancing kinetics. As result, S‐NiFeZn LDH/NF achieves low overpotentials 201 mV 10 mA cm −2 293 500 1.0 m KOH. Moreover, cell assembled with anode commercial NiMo cathode demonstrates excellent overall water splitting activity, voltages 1.62 1.81 V KOH, exhibits ultralong‐term durability over h , even operating stably for 200 an electrolyzer under industrial conditions (30% KOH 80 °C).

Language: Английский

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Electronic structure engineering of NiFe hydroxide nanosheets via ion doping for efficient OER electrocatalysis

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156430 - 156430

Published: Oct. 1, 2024

Language: Английский

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Crystalline Ru-Decorated MOF-Derived Amorphous CoMo-LDH Nanosheet Arrays as Bifunctional Catalysts for Overall Natural Seawater Electrolysis

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 24, 2024

The construction of an amorphous/crystalline heterostructure MOF-derived electrocatalysts offers intriguing pathway to improve hydrogen production efficiency, but it has received little attention. Here, we report crystalline Ru-decorated amorphous CoMo-LDH nanosheet arrays as highly active and robust bifunctional for natural seawater electrolysis. Benefiting from the abundant interfaces, Ru-CoMo-LDH catalyst exhibits excellent activity toward OER under fresh seawater, in particular; requires only 257 406 mV overpotential at 10 500 mA cm

Language: Английский

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The cobalt-based metal organic frameworks array derived CoFeNi-layered double hydroxides anode and CoP/FeNi2P heterojunction cathode for ampere-level seawater overall splitting

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 676, P. 52 - 60

Published: July 14, 2024

Language: Английский

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Interface engineering of Ni3S2 coupled NiFe-LDH heterostructure enables superior overall water splitting

Materials Today Chemistry, Journal Year: 2025, Volume and Issue: 43, P. 102510 - 102510

Published: Jan. 1, 2025

Language: Английский

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In Situ Synthesis of Ternary Ni-Fe-Mo Nanosheet Arrays for OER in Water Electrolysis

Molecules, Journal Year: 2025, Volume and Issue: 30(1), P. 177 - 177

Published: Jan. 4, 2025

Water electrolysis is a promising path to the industrialization development of hydrogen energy. The exploitation high-efficiency and inexpensive catalysts become important mass use water decomposition. Ni-based nanomaterials have exhibited great potential for catalysis splitting, which attracted attention researchers around world. Here, we prepared novel Mo-doped NiFe-based layered double hydroxide (LDH) with nanoarray microstructure on Ni foam. doping amount Mo can significantly change electrocatalysis, will further affect oxygen evolution reaction (OER) performance splitting. This nanomaterial required only an overpotential 227 mV 10 mA cm−2 Tafel slope 54.8 mV/dec in 1 M KOH. Meanwhile, there was no Mo, NiFe-LDH needed 233 attain cm−2. Compared without NiFeMo-LDH nanosheet arrays enhanced activities 17.1 less OER. good electrocatalyst ascribed special heterostructure Ni-Fe-Mo system. These features help increase active surface, enhancing efficient charge transfer reactive activity

Language: Английский

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Differentiated Modulating the Electronic Structure of NiFe@Ni/Fe‐MnOx via Phase Transformation Engineering to Synergy Promote Bifunctional Water Splitting Reactions

Small, Journal Year: 2025, Volume and Issue: 21(7)

Published: Jan. 7, 2025

Abstract Modulating electronic structure to balance the requirement of both hydrogen evolution reaction (HER) and oxygen (OER) is crucial for developing bifunctional catalysts. Herein, phase transformation engineering utilized separately regulate catalyst structure, designed NiFe@Ni/Fe‐MnOOH schottky heterojunction exhibits remarkable electrocatalytic activity with low overpotentials 19 230 mV at 10 mA cm −2 HER OER in 1M KOH, respectively. Meanwhile, an anion‐exchange membrane water electrolyzer employing as electrodes shows voltages 1.487/1.953 V 10/1000 , operating over 200 h 1000 . Combining theoretical calculations experiments reveal that can differentially active phases HER/OER. In HER, Ni/Fe‐MnOOH metallic NiFe act *OH *H acceptors respectively accelerates dissociation subsequent Heyrovsky/Tafel step. While OER, significant Jahn‐Teller effect Mn 3+ induces surface reconstruction from Ni/Fe‐MnO 2 The formative high value 4+ modify M‐O hybridization activate lattice mechanism, which pivotal breaking restriction volcanic relationship reducing overpotential. These findings provide valuable design guidelines high‐performance multi‐functional electrocatalysts via engineering.

Language: Английский

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Superhydrophilic S‐NiFe LDH by Room Temperature Synthesis for Enhanced Alkaline Water/Seawater Oxidation at Large Current Densities

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

Published: Feb. 4, 2025

Abstract Developing high‐performance oxygen evolution reaction (OER) electrocatalysts that can operate stably at large current densities in seawater plays a crucial role enabling large‐scale hydrogen production, however, it remains significant challenge. Herein, sulfur‐doped NiFe layered double hydroxide nanosheet (S‐NiFe LDH) grown on 3D porous nickel foam skeleton is synthesized through electrochemical deposition and ion‐exchange strategies room temperature as high‐performance, highly selective, durable OER electrocatalyst for electrolysis density. The incorporation of S enhance the conductivity, promote structural reconstruction to form active oxyhydroxides, well improve anti‐corrosion ability chloride ions. Furthermore, due its unique self‐supporting structure superhydrophilicity, which provide abundant sites efficient bubble release, optimized demands minimal overpotential 278 299 mV generate 1000 mA cm −2 alkaline freshwater/seawater, respectively, confirming excellent activity. Meanwhile, also demonstrates exceptional stability both media, maintains stable performance duration 200 h 500 . present work offers an strategy innovative viewpoint developing electrolysis.

Language: Английский

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