Ir/Mn Co‐Mixing and Oxide‐Support Interaction Modulation Through Plasma Promoted Asymmetric Oxygen Coupling for Stable Acidic Oxygen Evolution

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

Published: March 23, 2025

Abstract Developing efficient and stable catalysts that facilitate the oxygen‐evolution reaction (OER) through an oxide‐path mechanism (OPM) is of considerable interest. However, it remains a significant challenge due to stringent structural requirements these catalysts. This work reports using strategy integrates Ir/Mn co‐mixing strong oxide‐support interaction (SOSI) modulation, Ir‐based follow OPM for acidic OER can be developed. The mainly relies on optimizing distance oxygeneous intermediate adsorption sites by modulating SOSI plasma defect engineering trigger pathway with lower energy barrier. density‐functional‐theory (DFT) calculations reveal electronic coupling between Ir Mn via Ir─O─Mn bond ready adsorbed site those site, leading asymmetric oxygen OER. developed catalyst merely requires overpotential 240 mV drive 10 mA cm −2 mass‐activity > 75 times higher than IrO 2 . When used in proton‐exchange‐membrane water‐electrolyzers, shows high performance excellent stability at industrial‐level current density 1.0 A

Language: Английский

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Recent Progress of Modulating Pristine Metal–Organic Frameworks for Oxygen Reaction Revolution

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

Published: April 22, 2025

Highly efficient and stable oxygen evolution reaction (OER) electrocatalysts are essential for electrochemical water splitting. Among non-noble metal-based catalysts, metal-organic frameworks (MOFs) have recently emerged as particularly promising candidates due to their exceptional surface areas, hierarchical porous structures, tunable morphologies compositions. The rational regulation of the morphology electronic structure pristine MOFs is considered a critical pathway enhancing active sites structural stability, thereby significantly boosting OER catalytic performance. This review systematically presents recent advancements in modulating via heterogeneous metal doping, ligand substitution, hybrid composite construction. With particular emphasis on synthetic methods, modification mechanisms, properties MOFs, we analyze fundamental relationships between modifications electrocatalytic Through systematic analysis existing research achievements, this provides holistic assessment current state-of-the-art developments, identifies challenges, proposes future directions with practical implications electrocatalyst design.

Language: Английский

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Silver Induced In-Phase Electronic Interaction and Chloride Ion Repelling for Efficient Electrocatalytic Oxygen Evolution in Seawater Electrolysis

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 2, 2025

Seawater electrolysis for hydrogen production has emerged as a focal point in energy utilization technology due to its low carbon emissions and the abundance of seawater resources. However, high chlorine content an electrolyte negatively impacts stability performance anodic catalysts. Herein, we design silver integration strategy repel surface Cl– adsorption modulate electronic structure metal active center NiCo bimetallic organic framework (MOF). The obtained Ag@NiCo MOF achieves overpotential 269 mV at current density 10 mA cm–2 toward oxygen evolution reaction (OER) maintains this over 500 h simulated alkaline without obvious degradation. superior is because in-phase interaction induced by deposited Ag optimizes electron state sites. Moreover, situ transforms into AgCl during OER further triggering repulsion on electrode surface. This not only facilitates kinetic but also helps chloride ions enhances selectivity OER. electrochemical render them highly competitive among various catalysts spitting.

Language: Английский

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Single-atom catalysis for oxygen reduction, what's next?

Next Materials, Journal Year: 2024, Volume and Issue: 6, P. 100464 - 100464

Published: Dec. 28, 2024

Language: Английский

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