Oxygen Evolution/Reduction Reaction Catalysts: From In Situ Monitoring and Reaction Mechanisms to Rational Design

Chemical Reviews, Год журнала: 2023, Номер 123(9), С. 6257 - 6358

Опубликована: Март 21, 2023

The oxygen evolution reaction (OER) and reduction (ORR) are core steps of various energy conversion storage systems. However, their sluggish kinetics, i.e., the demanding multielectron transfer processes, still render OER/ORR catalysts less efficient for practical applications. Moreover, complexity catalyst–electrolyte interface makes a comprehensive understanding intrinsic mechanisms challenging. Fortunately, recent advances in situ/operando characterization techniques have facilitated kinetic monitoring under conditions. Here we provide selected highlights mechanistic studies with main emphasis placed on heterogeneous systems (primarily discussing first-row transition metals which operate basic conditions), followed by brief outlook molecular catalysts. Key sections this review focused determination true active species, identification sites, reactive intermediates. For in-depth insights into above factors, short overview metrics accurate characterizations is provided. A combination obtained time-resolved information reliable activity data will then guide rational design new Strategies such as optimizing restructuring process well overcoming adsorption-energy scaling relations be discussed. Finally, pending current challenges prospects toward development homogeneous presented.

Язык: Английский

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Water splitting performance of metal and non-metal-doped transition metal oxide electrocatalysts

Coordination Chemistry Reviews, Год журнала: 2022, Номер 474, С. 214864 - 214864

Опубликована: Окт. 12, 2022

Язык: Английский

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Surface Activation and Ni‐S Stabilization in NiO/NiS₂for Efficient Oxygen Evolution Reaction

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(35)

Опубликована: Июнь 22, 2022

Manipulating the active species and improving structural stabilization of sulfur-containing catalysts during OER process remain a tremendous challenge. Herein, we constructed NiO/NiS2 Fe-NiO/NiS2 as catalyst models to study effect Fe doping. As expected, exhibits low overpotential 270 mV at 10 mA cm-2 . The accumulation hydroxyl groups on surface materials after doping can promote formation highly NiOOH lower potential. Moreover, investigated level corrosion M-S bonds compared stability variation with different locations. Interestingly, bonded S in bulk sacrificial agent alleviate oxidation partial Ni-S thus endow long-term durability. This work could motivate community focus more resolving materials.

Язык: Английский

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Defect engineering of two-dimensional materials for advanced energy conversion and storage

Chemical Society Reviews, Год журнала: 2023, Номер 52(5), С. 1723 - 1772

Опубликована: Янв. 1, 2023

Defective two-dimensional (2D) materials show huge potential for energy-related fields. This review overviews the formation/evolution mechanisms and engineering strategies of defects in 2D materials, which enable enhanced electrode reaction kinetics.

Язык: Английский

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Sustainable zinc–air battery chemistry: advances, challenges and prospects

Chemical Society Reviews, Год журнала: 2023, Номер 52(17), С. 6139 - 6190

Опубликована: Янв. 1, 2023

Sustainable zinc-air batteries (ZABs) are considered promising energy storage devices owing to their inherent safety, high density, wide operating temperature window, environmental friendliness, etc., showing great prospect for future large-scale applications. Thus, tremendous efforts have been devoted addressing the critical challenges associated with sustainable ZABs, aiming significantly improve efficiency and prolong operation lifespan. The growing interest in ZABs requires in-depth research on oxygen electrocatalysts, electrolytes, Zn anodes, which not systematically reviewed date. In this review, fundamentals of electrocatalysts air cathodes, physicochemical properties ZAB issues strategies stabilization anodes summarized from perspective fundamental characteristics design principles. Meanwhile, significant advances situ/operando characterization highlighted provide insights into reaction mechanism dynamic evolution electrolyte|electrode interface. Finally, several thoughts perspectives provided regarding opportunities ZABs. Therefore, review provides a thorough understanding advanced chemistry, hoping that timely comprehensive can shed light upcoming horizons prosperous area.

Язык: Английский

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Unraveling the Mechanism on Ultrahigh Efficiency Photocatalytic H₂O₂ Generation for Dual‐Heteroatom Incorporated Polymeric Carbon Nitride

Advanced Functional Materials, Год журнала: 2022, Номер 32(38)

Опубликована: Июль 13, 2022

Abstract Photocatalytic hydrogen peroxide (H 2 O ) production from dioxygen and water is regarded as a promising technology since it can achieve sustainable green solar‐to‐chemical energy conversion. Herein, oxygen potassium dual‐heteroatom incorporated polymeric carbon nitride (O/KCN) rationally designed for H generation with an ultrahigh rate of 309.44 µM h −1 mg , which surpasses that other C 3 N 4 ‐based photocatalysts. The enhanced performance be ascribed to the effective light absorption, fast charge transfer/separation, strong adsorption, highly selective two‐electron reduction reaction (ORR). Density functional theory calculations further confirm obtained O/KCN more favorable than others electrons migrating β spin‐orbital π* orbitals molecule, thus optimizing molecule activation promote formation intermediate species *OOH decrease barrier production. This work not only provides in‐depth insights photocatalytic mechanism, but also lays foundation development active photocatalysts environmental remediation

Язык: Английский

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Carbon dots supported single Fe atom nanozyme for drug-resistant glioblastoma therapy by activating autophagy-lysosome pathway

Nano Today, Год журнала: 2022, Номер 45, С. 101530 - 101530

Опубликована: Июнь 22, 2022

Язык: Английский

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Fine-tune the electronic structure in Co-Mo based catalysts to give easily coupled HER and OER catalysts for effective water splitting

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 328, С. 122474 - 122474

Опубликована: Фев. 15, 2023

Язык: Английский

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Nitrogen vacancies enriched Ce-doped Ni3N hierarchical nanosheets triggering highly-efficient urea oxidation reaction in urea-assisted energy-saving electrolysis

Journal of Energy Chemistry, Год журнала: 2022, Номер 69, С. 506 - 515

Опубликована: Янв. 29, 2022

Язык: Английский

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Electronic structure regulation of noble metal-free materials toward alkaline oxygen electrocatalysis

eScience, Год журнала: 2023, Номер 3(4), С. 100141 - 100141

Опубликована: Май 11, 2023

Developing highly efficient, inexpensive catalysts for oxygen electrocatalysis in alkaline electrolytes (i.e., the reduction reaction (ORR) and evolution (OER)) is essential constructing advanced energy conversion techniques (such as electrolyzers, fuel cells, metal–air batteries). Recent achievements efficient noble metal-free ORR OER make replacement of conventional metal counterparts a realistic possibility. In particular, various electronic structure regulation strategies have been employed to endow these with attractive physicochemical properties strong synergistic effects, providing significant fundamental understanding advance this direction. This review article summarizes recently developed three types catalysts: transition compounds, single-atom catalysts, catalysts. We begin by briefly presenting basic mechanisms, following an analysis relationship between intrinsic electrocatalytic activity categories Subsequently, recent advances are systematically discussed. conclude summarizing remaining challenges our outlook on future designing synthesizing electrocatalysts.

Язык: Английский

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