The breakthrough of oxide pathway mechanism in stability and scaling relationship for water oxidation

National Science Review, Год журнала: 2024, Номер 11(11)

Опубликована: Окт. 15, 2024

ABSTRACT An in-depth understanding of electrocatalytic mechanisms is essential for advancing electrocatalysts the oxygen evolution reaction (OER). The emerging oxide pathway mechanism (OPM) streamlines direct O–O radical coupling, circumventing formation vacancy defects featured in lattice (LOM) and bypassing additional intermediates (*OOH) inherent to adsorbate (AEM). With only *O *OH as intermediates, OPM-driven stand out their ability disrupt traditional scaling relationships while ensuring stability. This review compiles latest significant advances OPM-based electrocatalysis, detailing design principles, synthetic methods, sophisticated techniques identify active sites pathways. We conclude with prospective challenges opportunities electrocatalysts, aiming advance field into a new era by overcoming constraints.

Язык: Английский

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Enhancing catalytic durability in alkaline oxygen evolution reaction through squaric acid anion intercalation

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Апрель 10, 2025

The corrosive acidic interfacial microenvironment caused by rapid multi-step deprotonation of alkaline oxygen evolution reaction in industrial high current water electrolysis is one the key problems limiting its stability. Some functional anions derived from electrocatalysis exhibit special functionalities modulating interface microenvironment, but this matter has not received adequate attention academic discussions. Here we show that coordinate squaric acid undergoes a dissolve-re-intercalation process evolution, leading to stabilization within Fe-doped NiOOH interlayer form (NiFe-SQ/NF-R). These intercalated stabilizes OH- through multiple hydrogen bond interactions, which conducive maintaining catalytic alkalinity. Hence, acidification prepared NiFe-SQ/NF-R inhibited, resulting tenfold prolong durability (from 65 700 h) when exposed 3.0 A cm-2, as opposed NiFe-LDH/NF-R. This anion guarantees enduring performance NiFe-derived electrocatalyst under densities controlling

Язык: Английский

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Ga-Induced p–d Orbital Hybridization in CoFe LDH for Boosted Oxygen Evolution Electrocatalysis

ACS Materials Letters, Год журнала: 2024, Номер 6(9), С. 3963 - 3969

Опубликована: Июль 29, 2024

CoFe-based layered double hydroxides (LDHs) are emerging as prominent candidates for the oxygen evolution reaction (OER) due to their tunable 3d orbital electronic structure but still restricted by strong adsorption of oxygen-containing intermediates high antibonding relative Fermi level. Herein, we synthesized Ga-doped CoFe LDH (GaCoFe LDH) a highly effective catalyst alkaline OER. Experimental and theoretical investigations reveal that p–d hybridization between Ga Co/Fe atoms plays critical role in boosting OER performance. This not only effectively reduces energy levels an enhanced filling degree also facilitates dehydrogenation *OH *O, thereby catalytic activity. Remarkably, GaCoFe exhibits excellent performance, surpassing both RuO2/NF, with low overpotentials 185 242 mV at 10 100 mA cm–2, respectively, while maintaining exceptional stability.

Язык: Английский

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High-Interface Alkalinity Induced by Intercalated Squaric Acid Anions for 700 Hours of Oxygen Evolution at 3 A cm−2

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

The corrosive acidic interfacial microenvironment caused by rapid multistep deprotonation of the alkaline oxygen evolution reaction (OER) in industrial high-current water electrolysis is one key problems limiting activity and stability. Some functional anions derived from electrocatalysis exhibit special functionalities modulating catalytic interface microenvironment, but this matter has not received adequate attention academic discussions. coordinated squaric acid molecule revealed to undergo a dissolve-reintercalation process OER, leading its eventual stabilization within Fe-doped NiOOH interlayer form (Sq²⁻) (NiFe-SQ/NF-R). This intercalated Sq²⁻ stabilizes OH⁻ through multiple hydrogen bond interactions, which conducive maintaining high alkalinity. Hence, acidification prepared NiFe-SQ/NF-R OER significantly inhibited, resulting tenfold increase durability (from 65 700 hours) when exposed current density 3.0 A cm^{− 2}, as opposed traditional NiFe-LDH/NF-R materials. anion guarantees enduring performance NiFe-derived electrocatalyst under densities controlling

Язык: Английский

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Cooperative Cobalt-Doped and Carboxylate Anions Modification of NiFe-Layered Double Hydroxides for Improving Oxygen Evolution Reaction

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 4, 2025

The disparity of the fast electron-slow proton process significantly hinders catalytic efficiency oxygen evolution reaction (OER) in water splitting, so it is necessary to develop efficient and stable materials mitigate elevated overpotentials. In this study, a one-step hydrothermal approach was utilized synthesize cobalt-doped, carboxylic-acid-modified NiFe-layered double hydroxide (CoNiFe-LDH/NF) catalyst with enhanced intrinsic activity. Introducing Co promotes generation active components, carboxylate anions accelerate transfer, synergistic interaction which endows CoNiFe-LDH/NF superior OER performance. Experimental results show that has an overpotential as low 230 mV at 100 mA cm-2, Tafel slope 38.5 dec-1, excellent stability for 120 h current density 10 cm-2. Furthermore, mechanistic exploration by molecular probe detection pH-dependent experiment showed modified closer lattice oxidation mechanism (LOM). This study provides effective strategy improve performance layered materials.

Язык: Английский

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Redox-mediated oxygen evolution reaction: Engineering oxygen vacancies and heterojunctions in CeFeCo-UiO-66/layered double hydroxide via a two-step corrosion strategy

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 695, С. 137687 - 137687

Опубликована: Апрель 24, 2025

Язык: Английский

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Near‐Infrared‐Driven Photoelectrochemical Hydrogen Evolution Reaction Enabled by Plasmonic Gold Nanocone Arrays with High Curvatures

Small Methods, Год журнала: 2025, Номер unknown

Опубликована: Май 13, 2025

Abstract Harvesting a wide range of light is essential for photo‐driven reactions. In this study, the near‐infrared (NIR, λ ≥ 800 nm) driven photoelectrochemical (PEC) hydrogen evolution enabled by design gold nanocone (AuNC) arrays with high curvature reported. It found that synergistic interplay between static geometric fields (tip curvature‐derived) and spectrally responsive localized surface plasmon resonance dynamic drives reactant enrichment at surfaces array structure enhances absorption AuNC due to plasmonic collective effect, together promoting efficiency PEC under visible enabling NIR‐driven evolution, which otherwise cannot be achieved Au nanoparticle photocathode. As prototype electrocatalyst, RuO 2 further loaded onto create antenna‐reactor (AuNC‐Ru), exhibits substantially higher performance than AuNP‐Ru, achieving an overpotential 25 27 mV 10 mA cm −2 reaction in alkaline NIR irradiation, respectively. addition, stability AuNC‐Ru exceeds 500 h 120 100 .

Язык: Английский

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Redefining Catalytic Boundaries: Precise Design and Engineering of Nanoscale Partnerships in Nanoparticle-Regulated Single-Atom Catalysts for Multifunctional Applications

ACS Catalysis, Год журнала: 2025, Номер unknown, С. 10239 - 10270

Опубликована: Июнь 2, 2025

Язык: Английский

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Highly Valent Cobalt-manganese Spinel Nanowires Induced by Fluorine-Doping for Durable Acid Oxygen Evolution Reaction

Journal of Alloys and Compounds, Год журнала: 2024, Номер unknown, С. 176500 - 176500

Опубликована: Сен. 1, 2024

Язык: Английский

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A Perspective on Field-effect in Energy and Environmental Catalysis

Chemical Science, Год журнала: 2024, Номер unknown

Опубликована: Дек. 18, 2024

Gaining insights into the origins and roles of field-effect will facilitate better applications in energy environmental catalysis.

Язык: Английский

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