Development of noble metal-free electrocatalysts towards acidic water oxidation: From fundamental understanding to state-of-the-art catalysts

eScience, Journal Year: 2024, Volume and Issue: unknown, P. 100295 - 100295

Published: July 1, 2024

The development of low-cost and efficient electrocatalysts for oxygen evolution reaction (OER) in acid electrolytes is critical to the widespread implementation proton electrolyte membrane water electrolyzers (PEMWE) towards carbon neutralization. Noble metal Ir- Ru-based materials are state-of-the-art catalysts but still suffer from prohibitive price scarcity. In this context, a variety noble metal-free have been developed decrease cost PEMWE. review, we first summarize activity expression mechanism stability issues non-precious catalysts, highlighting origins performance degradation possible mitigation strategies. Then, systematically review several recently focusing on design rationale structure-performance relation. Finally, prospects non-noble prospected, with potential challenges practical applications presented.

Language: Английский

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Strategies for Tuning Tensile Strain and Localized Electrons in a Mo‐Doped NiCoCu Alloy for Enhancing Ampere‐Level Current Density HER Performance

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

Published: June 7, 2024

Abstract Developing high‐activity non‐noble metal catalysts for improving the ability of water dissociation and H* adsorption/desorption in hydrogen evolution reaction (HER) process alkaline neutral electrolytes is essential but remains challenging. Herein, a Mo‐doped NiCoCu alloy with tuned tensile strain localized electrons designed synthesized by combining solvothermal annealing methods achieving ampere‐level HER performance. Theoretical calculation results prove that Mo doping induces lattice (electrons from to Ni/Co/Cu atoms), promoting adsorption O* H 2 O molecules on Co sites accelerating dissociation. Therefore, NiCoCu‐Mo 0.078 /CF (CF = copper foam) shows low energy, providing sufficient during process. Meanwhile, its Gibbs free energy value near zero, implying rapid Electrochemical show achieves better intrinsic activity both 1.0 m KOH ( η −10 /η −1000 35/212 mV) phosphate buffer solution 24/256 compared 0 0.163 /CF, it can continuously operate 100 h at mA cm −2 . This work sustainable way design high‐performance electrolysis proposes well‐performing catalyst.

Language: Английский

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Harnessing the Synergistic Effects of Ir Co‐Decorated NiMn‐LDH: a Multi‐Analytical Approach to Boost Electrocatalytic Overall Water Splitting Activity in Alkaline Condition

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

Published: March 3, 2025

Abstract Fine control over the Ir precursor to Nickel‐based layered double hydroxides (LDHs) is significant for decorating both single atoms (SA) and nanoclusters (NC), thus modulating catalytic kinetics improving overall performance. In this study, NiMn‐LDH synthesized co‐decorated it with Iridium, introducing a new pathway developing efficient bifunctional electrocatalysts in water‐splitting technologies. Additionally, typical fibrous material has developed by immobilizing. onto PAN (polyacrylonitrile) nanofibers () using feasible electrospinning technique. Notably, catalyst exhibits low overpotentials of 249 110 mV oxygen (OER) hydrogen evolution reactions (HER) at 10 mA cm − 2 , cell voltage 1.65 V total water splitting (TWS). remained stable effective alkaline OER, HER, TWS 50 h. Furthermore, X‐ray adsorption near‐edge spectrum (XANES) experiments, together theoretical calculations, show that synergistic effect SA which helps enhance activity, promoting electron rearrangement lowering reaction energy barrier.

Language: Английский

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Metal organic frameworks for sustainable hydrogen production: Reaction mechanisms, performance and future aspects in electrochemical water splitting

Materials Chemistry and Physics, Journal Year: 2024, Volume and Issue: 322, P. 129553 - 129553

Published: June 3, 2024

Language: Английский

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Designing Salen‐Based Porous Organic Polymers for Enhanced Electrolytic Water Splitting into Oxygen

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(48)

Published: Aug. 22, 2024

Abstract The development of electricity‐driven oxygen evolution reaction (OER) is a potent solution for energy storage applications. In recent years, there surge in interest designing transition metal‐based catalysts with stable linkages, presenting an efficient alternative to noble electrocatalysts. Transition metal complexes linked by salen ligands garner considerable attention due their capacity chelate and stabilize ions. This work presents novel approach strategically incorporating the metal–salen core into porous organic polymer (POP) backbone, thereby fabricating highly effective electrocatalyst evolution. judicious selection active sites, coupled intramolecular free volume (IMFV) triptycene high specific surface area salen–POPs, result superior OER activity. By precisely tuning structure through variation unit, deep insights are gained electrocatalytic behavior. Notably, most catalyst, Ni‐DHDA‐TAT, exhibits impressively low overpotential ( η 10 ) ≈ 270 mV at current density mA cm −2 (in 1 m KOH). Further, Ni‐DHDA‐TAT retains its activity even after 50 h chronoamperometry 1000 cyclic voltammetry cycles negligible degradation initial performance.

Language: Английский

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Recent Research on Iridium‐Based Electrocatalysts for Acidic Oxygen Evolution Reaction from the Origin of Reaction Mechanism

Small, Journal Year: 2024, Volume and Issue: 20(43)

Published: June 28, 2024

As the anode reaction of proton exchange membrane water electrolysis (PEMWE), acidic oxygen evolution (OER) is one main obstacles to practical application PEMWE due its sluggish four-electron transfer process. The development high-performance OER electrocatalysts has become key improving kinetics. To date, although various excellent have been widely researched, Ir-based nanomaterials are still state-of-the-art electrocatalysts. Hence, a comprehensive and in-depth understanding mechanism crucial for precise optimization catalytic performance. In this review, origin nature conventional adsorbate (AEM) derived volcanic relationship on processes summarized some strategies based AEM introduced. further investigate strategy electrocatalysts, several unconventional mechanisms including dual-site lattice mediated mechanism, their applications introduced in detail. Thereafter, active species at classified into surface Ir O species. Finally, future direction prospect put forward.

Language: Английский

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Recent Advances in Electrochemical Water Splitting Electrocatalysts: Categorization by Parameters and Catalyst Types

ACS Materials Letters, Journal Year: 2024, Volume and Issue: unknown, P. 3625 - 3666

Published: July 15, 2024

Hydrogen energy, heralded as a novel, clean, and highly efficient energy source, stands at the forefront of initiatives aimed decarbonizing fostering sustainable carbon-neutral economy. Recent strides in hydrogen production through water splitting have marked significant progress, leveraging its inherent benefits, such zero carbon emissions, safety, exceptional product purity. Despite these advancements, challenges persist surmounting substantial barrier water-splitting costs. Many electrocatalysts been innovatively designed reported to address hurdles. However, translation advances into industrial-scale applications faces multifaceted obstacles. Urgent demands for high-performance meeting industrial standards underscore imperative deeper comprehension systems. This review delves latest developments electrolysis, synthesizing experimental findings promising strategies with different electrochemical parameters along high entropy metals, doping engineering, interface construction, defect engineering. considerable creating numerous recent investigations, persist, impeding widespread implementation electrolytic splitting. By providing comprehensive overview, this aims furnish knowledge-driven framework fundamental science while inspiration technical engineering endeavors craft tailored

Language: Английский

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Electroactive Tetrathiafulvalene-Based Covalent Organic Framework with Thiophene Units as Anode for High-Performance Hybrid Lithium-Ion Capacitors

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104038 - 104038

Published: Jan. 1, 2025

Language: Английский

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DNA Origami-Assembled Gold Nanobipyramid Dimer Electrocatalyst for Ultrahigh Oxygen Evolution Reaction Activity

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: 8(4), P. 1749 - 1761

Published: Jan. 21, 2025

In recent years, the oxygen evolution reaction (OER) has garnered considerable attention as a pivotal process for water electrolysis. The progress of this hinges on efficacy catalyst. present study, role DNA origami-assembled gold nanobipyramid (Au NBP) dimer structure was explored initiating electrocatalytic activity water-splitting reaction. Through strategic integration origami technology and Au NBPs, study aims to orchestrate precise modulation electrocatalyst architecture achieve unprecedented levels in OER. NBP catalyst exhibits lowest overpotential 146 mV at current density 10 mAcm–2 compared with its various constituents. configuration optimizes exposure catalytically active sites promotes efficient charge transfer pathways due presence origami. This endeavors unlock new frontiers material design, paving way toward sustainable energy technologies enhanced efficiency scalability.

Language: Английский

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Hierarchical Fe-based electrocatalyst for lattice oxygen mediated water oxidation with Industrial-Level activity

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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