Activating lattice oxygen in NiFe-based (oxy)hydroxide for water electrolysis

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

Опубликована: Апрель 21, 2022

Abstract Transition metal oxides or (oxy)hydroxides have been intensively investigated as promising electrocatalysts for energy and environmental applications. Oxygen in the lattice was reported recently to actively participate surface reactions. Herein, we report a sacrificial template-directed approach synthesize Mo-doped NiFe (oxy)hydroxide with modulated oxygen activity an enhanced electrocatalyst towards evolution reaction (OER). The obtained MoNiFe displays high mass of 1910 A/g at overpotential 300 mV. combination density functional theory calculations advanced spectroscopy techniques suggests that Mo dopant upshifts O 2 p band weakens metal-oxygen bond (oxy)hydroxide, facilitating vacancy formation shifting pathway OER. Our results provide critical insights into role determining demonstrate tuning constructing highly active electrocatalysts.

Язык: Английский

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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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NiCo-Based Electrocatalysts for the Alkaline Oxygen Evolution Reaction: A Review

ACS Catalysis, Год журнала: 2021, Номер 11(20), С. 12485 - 12509

Опубликована: Сен. 27, 2021

Electrocatalytic water splitting is a sustainable way to produce hydrogen energy, but the oxygen evolution reaction (OER) at anode has sluggish kinetics and low energy conversion efficiency, which major bottleneck for large-scale production. The design synthesis of robust low-cost OER catalysts are crucial OER. NiCo-based electrocatalysts have suitable atomic electronic structures, show high activity stability during process. Recently, significant progress been made in regulating structure composition understanding nature catalysis, especially mechanism, catalytic active sites, structure–activity relationship. In this work, we summarized discussed latest development OER, with particular emphasis on catalyst synthesis, strategies boosting performance, catalysis from experimental theoretical perspectives. some descriptors, relationships based unveiled. Finally, challenges futuristic outlooks improving performance proposed, hope review can provide guidance more efficient electrocatalysts.

Язык: Английский

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Surface Reconstruction of Water Splitting Electrocatalysts

Advanced Energy Materials, Год журнала: 2022, Номер 12(33)

Опубликована: Июль 8, 2022

Abstract Water electrolysis is regarded as an efficient and green method to produce hydrogen gas, a clean energy carrier that holds the key solving global problems. So far, efficiency large‐scale application of water are restricted by electrocatalytic activity applied catalysts. Recently, reconstruction phenomenon electrocatalysts during catalytic reaction has been discovered, which could form reactive sites for both oxygen evolution reactions. Regulation process generate large number species with high since demonstrated effective strategy enhance performance electrocatalysts. This review summarizes recent progress in regulation strategies First, mechanism briefly introduced, critical factors regarding systematically discussed, followed brief introduction advanced characterization reconstruction. Moreover, modulation summarized reported examples highlighting promoted effects on process. Finally, challenges facing surface‐reconstructed catalysts future discussed.

Язык: Английский

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Synergistic effect of multiple vacancies to induce lattice oxygen redox in NiFe-layered double hydroxide OER catalysts

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 323, С. 122091 - 122091

Опубликована: Ноя. 3, 2022

Язык: Английский

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Dynamic rhenium dopant boosts ruthenium oxide for durable oxygen evolution

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

Опубликована: Янв. 21, 2023

Heteroatom-doping is a practical means to boost RuO2 for acidic oxygen evolution reaction (OER). However, major drawback conventional dopants have static electron redistribution. Here, we report that Re in Re0.06Ru0.94O2 undergo dynamic accepting-donating adaptively boosts activity and stability, which different from with dopant We show during OER, (1) accept electrons at the on-site potential activate Ru site, (2) donate back large overpotential prevent dissolution. confirm via situ characterizations first-principle computation electron-interaction between facilitates adsorbate mechanism lowers adsorption energies intermediates stability of Re0.06Ru0.94O2. demonstrate high mass 500 A gcata.-1 (7811 gRe-Ru-1) number S-number = 4.0 × 106 noxygen nRu-1 outperform most electrocatalysts. conclude can be used active sites therefore guide design adaptive electrocatalysts clean energy conversions.

Язык: Английский

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Bifunctional Electrocatalysts for Overall and Hybrid Water Splitting

Chemical Reviews, Год журнала: 2024, Номер 124(7), С. 3694 - 3812

Опубликована: Март 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

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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S‐Doping Triggers Redox Reactivities of Both Iron and Lattice Oxygen in FeOOH for Low‐Cost and High‐Performance Water Oxidation

Advanced Functional Materials, Год журнала: 2022, Номер 32(26)

Опубликована: Март 23, 2022

Abstract Developing low‐cost and highly efficient earth‐abundant oxygen evolution reaction (OER) electrocatalysts via an energy‐ time‐saving method is of great significance to the generation H 2 from electrochemical water splitting, which desirable but still challenging. Herein, a one‐step route in situ grow S‐doped FeOOH vertical nanosheets on iron foam (IF) 20 min under room temperature shown. This facile ultrafast effectively modifies surface IF into layer, full‐Fe electrode (S‐FeOOH/IF) achieved. Systematic experiments characterizations demonstrate that redox reactivities for both lattice are sufficiently activated, leading dramatically improved intrinsic OER activity. The as‐obtained S‐FeOOH/IF exhibits fascinating performance with low overpotential 244 at 10 mA cm −2 . work affords engineering strategy drive commercial cost‐efficient robust oxidation, has important implications clean production through low‐carbon environmentally friendly route.

Язык: Английский

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The rapid self-reconstruction of Fe-modified Ni hydroxysulfide for efficient and stable large-current-density water/seawater oxidation

Energy & Environmental Science, Год журнала: 2022, Номер 15(11), С. 4647 - 4658

Опубликована: Янв. 1, 2022

S leaching induces rapid self-reconstruction and the ready formation of Ni 4+ in an Fe–NiSOH electrode, supporting high-efficiency stable alkaline large-current-density water/seawater oxidation.

Язык: Английский

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