Lattice Oxygen Redox Mechanisms in the Alkaline Oxygen Evolution Reaction

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: March 25, 2024

Abstract Understanding of fundamental mechanism and kinetics the oxygen evolution reaction (OER) is pivotal for designing efficient OER electrocatalysts owing to its key role in electrochemical energy conversion devices. In past few years, lattice oxidation (LOM) arising from anodic redox chemistry has attracted significant attention as it involves a direct O─O coupling thus bypasses thermodynamic limitations traditional adsorbate (AEM). Transition metal‐based oxyhydroxides are generally acknowledged real catalytic phase alkaline media. particular, their low‐dimensional layered structures offer sufficient structural flexibility trigger LOM. Herein, comprehensive overview provided recent advances anion LOM‐based electrocatalysts. Based on analyses electronic structure LOM, strategy proposed activate Possible identification techniques corroboration also reviewed. addition, reconstruction process induced by LOM focused importance multiple situ/operando characterizations highlighted unveil chemical origins To conclude, prospect remaining challenges future opportunities presented.

Language: Английский

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Exploring the potential Ru-based catalysts for commercial-scale polymer electrolyte membrane water electrolysis: A systematic review

Progress in Materials Science, Journal Year: 2024, Volume and Issue: 145, P. 101294 - 101294

Published: April 5, 2024

Language: Английский

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Advancing Green Hydrogen: Innovations and Challenges in Seawater Electrolysis for Sustainable Energy Production

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115644 - 115644

Published: Jan. 1, 2025

Language: Английский

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Balance between Fe^IV–Ni^IV synergy and Lattice Oxygen Contribution for Accelerating Water Oxidation

ACS Nano, Journal Year: 2024, Volume and Issue: 18(22), P. 14496 - 14506

Published: May 21, 2024

Hydrogen obtained from electrochemical water splitting is the most promising clean energy carrier, which hindered by sluggish kinetics of oxygen evolution reaction (OER). Thus, development an efficient OER electrocatalyst using nonprecious 3d transition elements desirable. Multielement synergistic effect and lattice oxidation are two well-known mechanisms to enhance activity catalysts. The latter generally related high valence state leading structural destabilization under condition. We have found that Al doping in nanosheet Ni–Fe hydroxide exhibits 2-fold advantage: (1) a strong enhanced 277 mV 238 at 10 mA cm–2 as Ni increases Ni3.58+ Ni3.79+ observed situ X-ray absorption spectra. (2) Operational stability strengthened, while weakness expected since increased NiIV content with 3d8L2 (L denotes O 2p hole) would lead instability. This contradiction attributed reduced contribution upon doping, verified through Raman spectroscopy, interpreted enormous gain exchange FeIV–NiIV, facilitated their intersite hopping. study reveals mechanism Fe–Ni synergy simultaneously strengthen operational suppressing oxygen.

Language: Английский

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Sequential oxygen evolution and decoupled water splitting via electrochemical redox reaction of nickel hydroxides

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Oct. 18, 2024

Alkaline water electrolysis is a promising low-cost strategy for clean and sustainable hydrogen production but largely limited by the sluggish anodic oxygen evolution reaction challenges in maintaining adequate separation between H2 O2. Here, we reveal an anodic-cathodic sequential process via electrochemical oxidation subsequent reduction of Ni hydroxides, enabling much lower overpotentials than conventional evolution. By using (isotope-labeled) differential mass spectrometry situ Raman spectroscopy combined with density functional theory calculations, evidence that originates from hydroxides to NiOO– active species while undergoing different, reductive step final release O2 due weakened Ni–O covalency. Based on this process, propose demonstrate hybrid energy storage device, which enables time-decoupled hydroxides. The authors report allowing decoupled during splitting

Language: Английский

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Recent progress in bimetallic carbide-based electrocatalysts for water splitting

Materials Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 8(3), P. 627 - 651

Published: Oct. 31, 2023

This review provides recent progresses in bimetallic carbides (Bi-TMCs) catalysts for the hydrogen evolution reaction (HER) and oxygen (OER) water splitting.

Language: Английский

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Preparation of highly efficient high-entropy alloy catalysts with electrodeposition and corrosion engineering for OER electrocatalysis

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 57, P. 651 - 659

Published: Jan. 12, 2024

Language: Английский

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Insights of oxygen vacancies engineered structural, morphological, and electrochemical attributes of Cr-doped Co3O4 nanoparticles as redox active battery-type electrodes for hybrid supercapacitors

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 100, P. 113751 - 113751

Published: Sept. 13, 2024

Language: Английский

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Corrosion of Electrochemical Energy Materials: Stability Analyses Beyond Pourbaix Diagrams

The Journal of Physical Chemistry C, Journal Year: 2023, Volume and Issue: 127(30), P. 14587 - 14598

Published: June 24, 2023

Since their first appearance, electrode potential/solution pH charts (Pourbaix diagrams) have served as a general framework for the analysis of material corrosion in aqueous solutions. Their utility describing electrochemical stability materials is rooted equilibrium thermodynamics based formalism. Electrochemical energy systems, however, do not always operate under thermodynamic conditions, and itself an inherently irreversible interfacial process. In this Perspective, we highlight number representative studies drawn primarily from (photo)electrocatalysis research aimed to account effects potentiodynamic polarization transient dissolution, reactions, formation metastable phases, strain-induced corrosion, well kinetics dissolution phase transformations. Some theoretical approaches that can help disentangle mechanisms conditions relevant conversion applications are briefly discussed. We also advocate more efforts directed at basic science has long been deemed "fancy" topic.

Language: Английский

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In Situ Raman Characterizations for Enhanced Understandings on Electrocatalysis

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(33), P. 13651 - 13665

Published: Aug. 12, 2024

Fundamental understanding of the key species during electrochemical reaction process is vital importance to mechanistic investigation and catalyst design heavily relies on experimental observations. The in situ Raman technique regarded as a powerful tool address this challenge, its collected signals can spectroscopically fingerprint related details track their dynamic evolution. In Perspective, we provide an overview recent developments about characterizations for reactions. We exemplify merits spectroscopic monitoring surface structure reconstruction intermediate evolution at electrified interface electrocatalyst hosts. also discuss how interpret underlying mechanism accordance with end, present future perspectives cordially anticipate more insightful contribution sustainable research fields including electrocatalysis, spectroelectrochemistry, beyond.

Language: Английский

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