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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Recent Development and Future Perspectives of Amorphous Transition Metal‐Based Electrocatalysts for Oxygen Evolution Reaction

Advanced Energy Materials, Год журнала: 2022, Номер 12(24)

Опубликована: Май 1, 2022

Abstract Oxygen evolution reaction (OER), as a relevant half for water splitting to address the energy crisis, has captured great deal of attention. However, this technology always been impeded by lack highly efficient and stable electrocatalyst. Amorphous materials, which possess long‐range disorder only short‐range order over few atoms, are often superior their crystalline counterparts in electrocatalysis owing more active sites, broader chemical composition range, structural flexibility. This review first introduces some assessment criteria OER then presents theoretical modeling mechanisms state‐of‐the‐art amorphous transition metal‐based electrocatalysts, involving oxides, hydroxides, sulfides, phosphides, borides, composites, well practical applications OER. Finally, recent development, existing challenges, future perspectives electrocatalysts discussed. paper offers valuable guidance designing applications.

Язык: Английский

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High valence metals engineering strategies of Fe/Co/Ni-based catalysts for boosted OER electrocatalysis

Journal of Energy Chemistry, Год журнала: 2022, Номер 76, С. 195 - 213

Опубликована: Сен. 16, 2022

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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Freestanding Metal–Organic Frameworks and Their Derivatives: An Emerging Platform for Electrochemical Energy Storage and Conversion

Chemical Reviews, Год журнала: 2022, Номер 122(11), С. 10087 - 10125

Опубликована: Апрель 21, 2022

Metal–organic frameworks (MOFs) have recently emerged as ideal electrode materials and precursors for electrochemical energy storage conversion (EESC) owing to their large specific surface areas, highly tunable porosities, abundant active sites, diversified choices of metal nodes organic linkers. Both MOF-based MOF-derived in powder form been widely investigated relation synthesis methods, structure morphology controls, performance advantages targeted applications. However, engage them applications, both binders additives would be required postprocessed electrodes, fundamentally eliminating some the sites thus degrading superior effects MOF-based/derived materials. The advancement freestanding electrodes provides a new promising platform EESC thanks apparent merits, including fast electron/charge transmission seamless contact between current collectors. Benefiting from synergistic effect structures materials, outstanding can achieved, stimulating increasing enthusiasm recent years. This review timely comprehensive overview on structural features fabrication techniques electrodes. Then, latest advances are summarized devices electrocatalysis. Finally, insights into currently faced challenges further perspectives these feasible solutions discussed, aiming at providing set guidance promote development scale-up production commercial

Язык: Английский

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Unraveling oxygen vacancy site mechanism of Rh-doped RuO2 catalyst for long-lasting acidic water oxidation

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Март 14, 2023

Exploring durable electrocatalysts with high activity for oxygen evolution reaction (OER) in acidic media is of paramount importance H2 production via polymer electrolyte membrane electrolyzers, yet it remains urgently challenging. Herein, we report a synergistic strategy Rh doping and surface vacancies to precisely regulate unconventional OER path the Ru-O-Rh active sites Rh-RuO2, simultaneously boosting intrinsic stability. The stabilized low-valent catalyst exhibits remarkable performance, an overpotential 161 mV at 10 mA cm-2 retention 99.2% exceeding 700 h 50 cm-2. Quasi situ/operando characterizations demonstrate recurrence reversible species under working potentials enhanced durability. It theoretically revealed that Rh-RuO2 passes through more optimal lattice mediated mechanism-oxygen vacancy site mechanism induced by interaction defects rate-determining step *O formation, breaking barrier limitation (*OOH) traditional adsorption mechanism.

Язык: Английский

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Oxygen Evolution Reaction in Energy Conversion and Storage: Design Strategies Under and Beyond the Energy Scaling Relationship

Nano-Micro Letters, Год журнала: 2022, Номер 14(1)

Опубликована: Апрель 28, 2022

The oxygen evolution reaction (OER) is the essential module in energy conversion and storage devices such as electrolyzer, rechargeable metal-air batteries regenerative fuel cells. adsorption scaling relations between intermediates, however, impose a large intrinsic overpotential sluggish kinetics on OER catalysts. Developing advanced electrocatalysts with high activity stability based non-noble metal materials still grand challenge. Central to rational design of novel high-efficiency catalysts development understanding quantitative structure-activity relationships, which correlate catalytic activities structural electronic descriptors. This paper comprehensively reviews benchmark descriptors for electrolysis, aiming give an in-depth origins electrocatalytic further contribute building theory electrocatalysis. Meanwhile, cutting-edge research frontiers proposing new paradigms crucial strategies circumvent relationship are also summarized. Challenges, opportunities perspectives discussed, intending shed some light concepts advance more efficient enhancing performance.

Язык: Английский

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Promoting nickel oxidation state transitions in single-layer NiFeB hydroxide nanosheets for efficient oxygen evolution

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Окт. 15, 2022

Abstract Promoting the formation of high-oxidation-state transition metal species in a hydroxide catalyst may improve its catalytic activity oxygen evolution reaction, which remains difficult to achieve with current synthetic strategies. Herein, we present synthesis single-layer NiFeB nanosheets and demonstrate efficacy electron-deficient boron promoting Ni for improved activity. Raman spectroscopy, X-ray absorption electrochemical analyses show that incorporation B into NiFe causes cathodic shift 2+ (OH) 2 → 3+δ OOH potential. Density functional theory calculations suggest an elevated oxidation state decreased energy barriers reaction catalyst. Consequently, density 100 mA cm –2 was achieved 1 M KOH at overpotential 252 mV, placing it among best Ni-based catalysts this reaction. This work opens new opportunities electronic engineering hydroxides (or oxides) efficient water-splitting applications.

Язык: Английский

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Recent progress in transition-metal-oxide-based electrocatalysts for the oxygen evolution reaction in natural seawater splitting: A critical review

eScience, Год журнала: 2023, Номер 3(2), С. 100111 - 100111

Опубликована: Фев. 15, 2023

Direct electrolytic splitting of seawater for the production H2 using ocean energy is a promising technology that can help achieve carbon neutrality. However, owing to high concentrations chlorine ions in seawater, evolution reaction always competes with oxygen (OER) at anode, and chloride corrosion occurs on both anode cathode. Thus, effective electrocatalysts selectivity toward OER excellent resistance should be developed. In this critical review, we focus prospects state-of-the-art metal-oxide electrocatalysts, including noble metal oxides, non-noble oxides their compounds, spinel- perovskite-type splitting. We elucidate chemical properties, selectivity, outstanding anti-chlorine-corrosion performance, mechanisms. particular, review operate current densities, near industrial application levels, based special catalyst design strategies.

Язык: Английский

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Anion Exchange Membrane Water Electrolyzer: Electrode Design, Lab-Scaled Testing System and Performance Evaluation

EnergyChem, Год журнала: 2022, Номер 4(5), С. 100087 - 100087

Опубликована: Авг. 4, 2022

Язык: Английский

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