Constructing Symmetry-Mismatched Ru_xFe_3–xO₄ Heterointerface-Supported Ru Clusters for Efficient Hydrogen Evolution and Oxidation Reactions

Nano Letters, Journal Year: 2024, Volume and Issue: 24(3), P. 1015 - 1023

Published: Jan. 12, 2024

Ru-related catalysts have shown excellent performance for the hydrogen evolution reaction (HER) and oxidation (HOR); however, a deep understanding of Ru-active sites on nanoscale heterogeneous support catalysis is still lacking. Herein, click chemistry strategy proposed to design Ru cluster-decorated nanometer RuxFe3–xO4 heterointerfaces (Ru/RuxFe3–xO4) as highly effective bifunctional catalysts. It found that introducing into nanometric Fe3O4 species breaks symmetry configuration optimizes active site in Ru/RuxFe3–xO4 HER HOR. As expected, catalyst displays prominent alkaline HOR with mass activity much higher than commercial Pt/C well robust stability during because strong interaction between cluster support, optimized adsorption intermediate (Had OHad). This work sheds light promsing approach improving electrocatalysis by breaking atomic dimension symmetry.

Language: Английский

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Subnanometric Osmium Clusters Confined on Palladium Metallenes for Enhanced Hydrogen Evolution and Oxygen Reduction Catalysis

ACS Nano, Journal Year: 2024, Volume and Issue: 18(14), P. 9942 - 9957

Published: March 29, 2024

Highly efficient, cost-effective, and durable electrocatalysts, capable of accelerating sluggish reaction kinetics attaining high performance, are essential for developing sustainable energy technologies but remain a great challenge. Here, we leverage facile heterostructure design strategy to construct atomically thin Os@Pd metallenes, with atomic-scale Os nanoclusters varying geometries confined on the surface layer Pd lattice, which exhibit excellent bifunctional properties catalyzing both hydrogen evolution (HER) oxygen reduction reactions (ORR). Importantly, Os5%@Pd metallenes manifest low η10 overpotential only 11 mV in 1.0 M KOH electrolyte as well highly positive E1/2 potential 0.92 V 0.1 (ORR), along superior mass activities electrochemical durability. Theoretical investigations reveal that strong electron redistribution between elements renders precise fine-tuning respective d-band centers, thereby guiding adsorption intermediates an appropriate binding optimal HER ORR.

Language: Английский

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Scaling up the charge transfer on Pd@Ti₃C₂T_x–TiO₂ catalysts: a sustainable approach for H₂ generation via water splitting

Materials Advances, Journal Year: 2023, Volume and Issue: 5(6), P. 2238 - 2252

Published: Dec. 21, 2023

The increasing energy demands have led modern societies to search for green and renewable alternatives. For this purpose, we synthesized highly active MXene supported catalysts (Pd@Ti 3 C 2 T x –TiO ).

Language: Английский

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Electrochemical Leaching of Ni Dopants in IrRu Alloy Electrocatalyst Boosts Overall Water Splitting

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

Published: June 16, 2024

Abstract The commercialization of water‐splitting technology strongly relies on the stable and high‐performance electrocatalyst for hydrogen oxygen evolution reactions (HER‐OER). In this work, nickel dopants in IrRu alloyed acidic water splitting activity are investigated. incorporation induces more atoms coordinating with Ir/Ru facilitating formation *OOH species via nucleophilic attack by H 2 O. Additionally, a fast surface reconstruction is achieved due to electrochemical dissolution Ni dopants; as result, incorporated, evidenced situ Raman spectroscopy impedance spectroscopy. Therefore, mass Ni@IrRu enhanced threefold than commercial IrO OER catalysis. Moreover, balance binding strength; only 609 mV overpotential demanded reach 1 A cm −2 HER polymer electrolyte membrane electrolyzer (PEMWE) test indicates 1.87 V required attain , 160 lower Pt/C‐IrO revealing its potential application PEMWE.

Language: Английский

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Non‐Noble‐Metal‐Based Electrocatalysts for Acidic Oxygen Evolution Reaction: Recent Progress, Challenges, and Perspectives

Small, Journal Year: 2024, Volume and Issue: 20(48)

Published: Aug. 25, 2024

Abstract The oxygen evolution reaction (OER) plays a pivotal role in diverse renewable energy storage and conversion technologies, including water electrolysis, electrochemical CO 2 reduction, nitrogen fixation, metal‐air batteries. Among various electrolysis techniques, proton exchange membrane (PEM)‐based devices offer numerous advantages, high current densities, exceptional chemical stability, excellent conductivity, high‐purity H . Nevertheless, the prohibitive cost associated with Ir/Ru‐based OER electrocatalysts poses significant barrier to broad‐scale application of PEM‐based splitting. Consequently, it is crucial advance development non‐noble metal catalysis substance acid‐activity thereby fostering their widespread integration into PEM electrolyzers (PEMWEs). In this review, comprehensive analysis acidic mechanism, encompassing adsorbate mechanism (AEM), lattice (LOM) oxide path (OPM) offered. Subsequently, systematic summary recently reported noble‐metal‐free catalysts transition metal‐based, carbon‐based other types provided. Additionally, compilation situ/operando characterization techniques provided, serving as invaluable tools for furnishing experimental evidence comprehend catalytic mechanism. Finally, present challenges future research directions concerning precious‐metal‐free are comprehensively summarized discussed review.

Language: Английский

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A self‐powered system to electrochemically generate ammonia driven by palladium single atom electrocatalyst

SusMat, Journal Year: 2024, Volume and Issue: 4(5)

Published: Aug. 21, 2024

Abstract The utilization of single atoms (SAs) as trifunctional electrocatalyst for nitrogen reduction, oxygen and evolution reactions (NRR, ORR, OER) is still a formidable challenge. Herein, we devise one‐pot synthesized palladium SAs stabilized on nitrogen‐doped carbon SA (Pd‐SA/NC) efficient NRR, OER. Pd‐SA/NC performs robust catalytic activity toward NRR with faradaic efficiency 22.5% at −0.25 V versus reversible hydrogen electrode (RHE), the relative Pd enhanced by 17‐fold than Pd‐NP/NC. In addition, half‐wave potential reaches 0.876 RHE, amounting to 58‐time higher mass commercial Pt/C. Moreover, overpotential 10 mA cm −2 low 287 mV Pd‐SA/NC, outperforming IrO 2 360 times in turnover frequency 1.6 RHE. Accordingly, assembled rechargeable zinc‐air battery (ZAB) achieves maximum power density 170 mW , boosted 2.3 Pt/C–IrO . Two constructed ZABs efficiently NRR‐OER system electrochemically generate ammonia implying its superior trifunctionality.

Language: Английский

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Recent advances in platinum group metallenes: From synthesis to energy-related electrocatalytic application

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125041 - 125041

Published: Jan. 1, 2025

Language: Английский

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Air-Calcined Fe/Ni-Based Metal–Organic Framework Nanosheets for Oxygen Evolution Reactions

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(8), P. 8978 - 8987

Published: April 11, 2024

The oxygen evolution reaction (OER) plays a pivotal role in the hydrolysis process of zinc–air batteries. Consequently, it is essential to develop cathode catalysts with both cost-effectiveness and high activity. In this study, we synthesized FeFFIVE-1-Ni two-dimensional (2D) metal–organic framework (MOF) nanosheets via straightforward solvothermal approach oxidized them an air atmosphere. During calcination atmosphere, heteroatoms (O, F) within 2D MOF combine iron nickel metal ions, forming FeOF NiF2 compounds. synergy between these compounds creation surface cracks during yield catalytic active power sites for reaction. Notably, overpotential calcined under alkaline test conditions (η10 = 286 mV) was lower than that commercial RuO2 355 mV). This work presents effective strategy replacing noble such as by simply treating fluorinated frameworks.

Language: Английский

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Controllable Interfacial Charge Transfer in Ce-BWO@Os by Constructing Ohmic Contact to Achieve Efficient PEC Water Splitting

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 106660 - 106660

Published: May 1, 2025

Language: Английский

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Band Energy Modulation in an Fe–Mn–ZnO Nanowire–Nanosheet Catalyst for Efficient Overall Water Splitting

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(7), P. 6300 - 6313

Published: March 21, 2024

Here, we studied a simple, scalable, and in situ hydrothermal method to prepare an Fe–Mn-doped ZnO nanowire–nanosheet on three-dimensional (3D) Ni-foam substrate for electrocatalytic overall water splitting. Attractively, the doping of Fe Mn plays significant role mobilizing electron from toward due different vacuum levels Fe, Mn, ZnO, facilitating development more active sites surface catalyst, which crucial improving catalytic performances during Consequently, shows lowermost overpotential 230 mV Tafel slope 115.2 dec–1 hydrogen evolution reaction (HER) 248 short 109.1 oxygen (OER) 1.0 M KOH electrolyte. Besides, depicts low charge transfer series resistances 3.7 0.41 Ω HER 0.36 1.66 OER, respectively. Also, it elucidates outstanding durability at −10 mA cm–2 12 h 10 using chronopotentiometry 1000 cycles. In addition, Fe–Mn–ZnO||Fe–Mn–ZnO cell lower potential 1.74 V stability over 24 deliver staircase also suggests 8.2 current densities. Captivatingly, concept energy band modulation bimetallic doped Fe–Mn–ZnO catalyst is envisaged explore insights into mechanisms oxygen.

Language: Английский

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