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

National Science Review, Journal Year: 2024, Volume and Issue: 11(11)

Published: Oct. 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.

Language: Английский

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Manipulating the Spin State of Spinel Octahedral Sites via a π–π Type Orbital Coupling to Boost Water Oxidation

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(37)

Published: June 24, 2024

Spin state is often regarded as the crucial valve to release reactivity of energy-related catalysts, yet it also challenging precisely manipulate, especially for active center ions occupied at specific geometric sites. Herein, a π-π type orbital coupling 3d (Co)-2p (O)-4f (Ce) was employed regulate spin octahedral cobalt sites (Co

Language: Английский

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Spin-dependent electrocatalysis

National Science Review, Journal Year: 2024, Volume and Issue: 11(9)

Published: Aug. 13, 2024

The shift towards sustainable energy requires efficient electrochemical conversion technologies, emphasizing the crucial need for robust electrocatalyst design. Recent findings reveal that efficiency of some electrocatalytic reactions is spin-dependent, with spin configuration dictating performance. Consequently, understanding spin's role and controlling it in electrocatalysts important. This review succinctly outlines recent investigations into spin-dependent electrocatalysis, stressing its importance conversion. It begins an introduction to spin-related features, discusses characterization techniques identifying configurations, explores strategies fine-tuning them. At end, article provides insights future research directions, aiming more unknown fundamentals electrocatalysis encourage further exploration applications.

Language: Английский

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Balancing the Charge Separation and Surface Reaction Dynamics in Twin‐Interface Photocatalysts for Solar‐to‐Hydrogen Production

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

Published: Nov. 19, 2024

Solar-driven photocatalytic green hydrogen (H

Language: Английский

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Electron delocalization-modulated hydroxyl binding for enhanced hydrogen evolution reaction activity

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

Published: Feb. 1, 2025

Language: Английский

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Ferrocene-MOFs: Optimizing OER Kinetics for Water Splitting

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 27, 2025

Optimizing the adsorption and desorption kinetics of oxygen evolution reaction (OER) is crucial for efficient overall water splitting. Herein, we report a series porous ferrocene-based metal–organic framework (MFc-MOF, M = Co, Ni, Fe, Mn) nanoflowers featuring close π–π stacking lattice structure as model catalysts, explore structure–activity relationship. Operando electrochemical impedance spectroscopy implies that synthesized CoFc-MOF@NF facilitates intermediate desorption. It exhibits an ultralow overpotential 189 mV at 10 mA cm–2 maintains stability 250 h. In splitting device, when serves anode, it yields significantly lower cell voltage than commercial RuO2 shows excellent 100 situ Raman reveals surface transforms into CoFeOOH, OER-active species, while preserving MOF framework. The inner MOF's ferrocene units act electron-transfer mediators. These findings highlight CoFc-MOF@NF's potential leading catalyst sustainable hydrogen production, combining high catalytic activity, rapid kinetics, robust stability. This work presents new approach to balance activity in MOF-based OER catalysts.

Language: Английский

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Heterogeneous CoO/Co₃O₄ Nanostructures as Efficient Anodes for Hydrogen Generation via Acidic Water Electrolysis

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

Published: March 26, 2025

Language: Английский

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Advances in dual-site mechanisms for designing high-performance oxygen evolution electrocatalysts

eScience, Journal Year: 2025, Volume and Issue: unknown, P. 100403 - 100403

Published: March 1, 2025

Language: Английский

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Synergistic Ternary Catalysis: NiCo-LDH/Ni₃S₂/Co₉S₈@NiFe-LDH-Ov/NF Composite Catalyst for High-Efficiency HER/OER Bifunctional Water Splitting

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180462 - 180462

Published: April 1, 2025

Language: Английский

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Manipulating Electron Structure through Dual-Interface Engineering of 3C-SiC Photoanode for Enhanced Solar Water Splitting

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Interface engineering is crucial for enhancing the efficiency of semiconductor-based solar energy devices. In this work, we report a novel dual-interface strategy by designing Ni(OH)2/Co3O4/3C-SiC photoanode that achieves remarkable enhancements in photoelectrochemical (PEC) water splitting performance. The optimized delivers photocurrent density 1.68 mA cm-2 at 1.23 V vs reversible hydrogen electrode (RHE), representing an 8-fold increase compared to pristine 3C-SiC, along with excellent operational stability. architecture, Co3O4 serves as highly efficient hole-extraction layer and forms p-n junction separation photogenerated electron-hole pairs. At Ni(OH)2/Co3O4 interface, formation Ni-O-Co bonds facilitates rapid charge transfer accelerates oxygen evolution reaction (OER) kinetics. microwave photoconductivity decay (μ-PCD) measurements confirm prolonged minority carrier lifetime, demonstrating critical role electronic structure modulation improving reducing recombination. Using advanced synchrotron radiation X-ray absorption spectroscopy, unveil modifications interfacial induced their roles PEC These findings establish clear relationship between modulation, dynamics, performance, providing new insights into interface design strategies solar-driven systems.

Language: Английский

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