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

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(9), P. 6257 - 6358

Published: March 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.

Language: Английский

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Bifunctional Electrocatalysts for Overall and Hybrid Water Splitting

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(7), P. 3694 - 3812

Published: March 22, 2024

Electrocatalytic water splitting driven by renewable electricity has been recognized as a promising approach for green hydrogen production. Different from conventional strategies in developing electrocatalysts the two half-reactions of (e.g., and oxygen evolution reactions, HER OER) separately, there growing interest designing bifunctional electrocatalysts, which are able to catalyze both OER. In addition, considering high overpotentials required OER while limited value produced oxygen, is another rapidly exploring alternative oxidation reactions replace hybrid toward energy-efficient generation. This Review begins with an introduction on fundamental aspects splitting, followed thorough discussion various physicochemical characterization techniques that frequently employed probing active sites, emphasis reconstruction during redox electrolysis. The design, synthesis, performance diverse based noble metals, nonprecious metal-free nanocarbons, overall acidic alkaline electrolytes, thoroughly summarized compared. Next, their application also presented, wherein anodic include sacrificing agents oxidation, pollutants oxidative degradation, organics upgrading. Finally, concise statement current challenges future opportunities presented hope guiding endeavors quest sustainable

Language: 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, Journal Year: 2022, Volume and Issue: 14(1)

Published: April 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.

Language: Английский

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Hydrogen society: from present to future

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(11), P. 4926 - 4943

Published: Jan. 1, 2023

Systematic insights into the recent attainments, limitations, and future directions of hydrogen production, storage, delivery, usage are provided, aiming at offering critical guidance for establishment a society.

Language: Английский

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

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(5), P. 1723 - 1772

Published: Jan. 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.

Language: Английский

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Construction of Zn-doped RuO2 nanowires for efficient and stable water oxidation in acidic media

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 2, 2023

Abstract Oxygen evolution reaction catalysts capable of working efficiently in acidic media are highly demanded for the commercialization proton exchange membrane water electrolysis. Herein, we report a Zn-doped RuO 2 nanowire array electrocatalyst with outstanding catalytic performance oxygen under conditions. Overpotentials as low 173, 304, and 373 mV achieved at 10, 500, 1000 mA cm −2 , respectively, robust stability reaching to h 10 . Experimental theoretical investigations establish clear synergistic effect Zn dopants vacancies on regulating binding configurations oxygenated adsorbates active centers, which then enables an alternative Ru−Zn dual-site oxide path reaction. Due change pathways, energy barrier rate-determining step is reduced, over-oxidation Ru sites alleviated. As result, activity significantly enhanced.

Language: Английский

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Long‐Term Stability Challenges and Opportunities in Acidic Oxygen Evolution Electrocatalysis

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(11)

Published: Dec. 22, 2022

Abstract Polymer electrolyte membrane water electrolysis (PEMWE) has been regarded as a promising technology for renewable hydrogen production. However, acidic oxygen evolution reaction (OER) catalysts with long‐term stability impose grand challenge in its large‐scale industrialization. In this review, critical factors that may lead to catalyst's instability couple potential solutions are comprehensively discussed, including mechanical peeling, substrate corrosion, active‐site over‐oxidation/dissolution, reconstruction, oxide crystal structure collapse through the lattice oxygen‐participated pathway, etc. Last but not least, personal prospects provided terms of rigorous evaluation criteria, situ / operando characterizations, economic feasibility and practical electrolyzer consideration, highlighting ternary relationship evolution, industrial‐relevant activity serve roadmap towards ultimate application PEMWE.

Language: Английский

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Boosting efficient alkaline fresh water and seawater electrolysis via electrochemical reconstruction

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(9), P. 3945 - 3957

Published: Jan. 1, 2022

A novel electrochemical reconstruction strategy enables the best seawater electrolysis performance.

Language: Английский

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Earth‐Abundant Metal‐Based Electrocatalysts Promoted Anodic Reaction in Hybrid Water Electrolysis for Efficient Hydrogen Production: Recent Progress and Perspectives

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(25)

Published: May 20, 2022

Abstract Exploring advanced technologies to efficiently produce green hydrogen energy is imperative alleviate the crisis and environmental pollution. Conventional overall water electrolysis (OWE) has been regarded as a promising approach for effective H 2 production, however, it largely restricted by sluggish kinetics of anodic oxygen evolution reaction (OER). Coupling kinetically favorable reactions, such biomass‐derived compound oxidation pollutant degradation, with (HER) in hybrid (HWE), can not only solve biomass recycling emission problems but also save cost clean generation. Hence, various earth‐abundant electrocatalysts have developed catalyze those yet some tedious preparation unsatisfactory performance still exist. Given gap between research practical applications, this review summarizes recent progress diverse alternative reactions over last five years together their application HWE systems. An in‐depth understanding different mechanisms assessments toward discussed further enhance efficiency. The advantages, differences, critical issues systems are thoroughly well, providing new avenue low‐voltage production from renewable resources waste products.

Language: Английский

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Cation Defect Engineering of Transition Metal Electrocatalysts for Oxygen Evolution Reaction

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(45)

Published: Sept. 30, 2022

Abstract The rational design and development of highly efficient oxygen evolution reaction (OER) electrocatalysts is vital for the application renewable energy devices. Recently, strategy defect engineering draws much attention due to its positive effect on regulating electronic structure, thus, promoting electrocatalytic performance various materials. In this review, main focus cation vacancy defects transition metal‐based electrocatalysts; latest progress in OER summarized. different effects are well discussed together with mechanism, mainly including improving conductivity, optimizing adsorption key intermediates, guiding surface reconstruction form active species, enhancing long‐term stability. Then, methods construct characterization vacancies systematically introduced. Finally, remaining challenges future prospects further proposed.

Language: Английский

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