RuO2 electronic structure and lattice strain dual engineering for enhanced acidic oxygen evolution reaction performance

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: July 1, 2022

Developing highly active and durable electrocatalysts for acidic oxygen evolution reaction remains a great challenge due to the sluggish kinetics of four-electron transfer severe catalyst dissolution. Here we report an electrochemical lithium intercalation method improve both activity stability RuO2 reaction. The intercalates into lattice interstices RuO2, donates electrons distorts local structure. Therefore, Ru valence state is lowered with formation stable Li-O-Ru structure, Ru-O covalency weakened, which suppresses dissolution Ru, resulting in greatly enhanced durability. Meanwhile, inherent strain results surface structural distortion LixRuO2 activates dangling O atom near site as proton acceptor, stabilizes OOH* dramatically enhances activity. This work provides effective strategy develop efficient towards water splitting.

Language: Английский

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Electrochemical Water Splitting: Bridging the Gaps Between Fundamental Research and Industrial Applications

Energy & environment materials, Journal Year: 2022, Volume and Issue: 6(5)

Published: May 28, 2022

Electrochemical water splitting represents one of the most promising technologies to produce green hydrogen, which can help realize goal achieving carbon neutrality. While substantial efforts on a laboratory scale have been made for understanding fundamental catalysis and developing high‐performance electrocatalysts two half‐reactions involved in electrocatalysis, much less attention has paid doing relevant research larger scale. For example, few such researches done an industrial Herein, we review very recent endeavors bridge gaps between applications electrolysis. We begin by introducing fundamentals electrochemical then present comparisons testing protocol, figure merit, catalyst interest, manufacturing cost industry‐based water‐electrolysis research. Special is tracking surface reconstruction process identifying real catalytic species under different conditions, highlight significant distinctions corresponding mechanisms. Advances designs industry‐relevant electrolysis are also summarized, reveal progress moving practical forward accelerating synergies material science engineering. Perspectives challenges electrocatalyst design strategies proposed finally further lab‐scale large‐scale electrocatalysis applications.

Language: Английский

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

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 474, P. 214864 - 214864

Published: Oct. 12, 2022

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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Facet Engineering of Advanced Electrocatalysts Toward Hydrogen/Oxygen Evolution Reactions

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Feb. 16, 2023

The electrocatalytic water splitting technology can generate high-purity hydrogen without emitting carbon dioxide, which is in favor of relieving environmental pollution and energy crisis achieving neutrality. Electrocatalysts effectively reduce the reaction barrier increase efficiency. Facet engineering considered as a promising strategy controlling ratio desired crystal planes on surface. Owing to anisotropy, with different orientations usually feature facet-dependent physical chemical properties, leading differences adsorption energies oxygen or intermediates, thus exhibit varied activity toward evolution (HER) (OER). In this review, brief introduction basic concepts, fundamental understanding mechanisms well key evaluating parameters for both HER OER are provided. formation facets comprehensively overviewed aiming give scientific theory guides realize dominant planes. Subsequently, three strategies selective capping agent, etching coordination modulation tune summarized. Then, we present an overview significant contributions facet-engineered catalysts HER, OER, overall splitting. particular, highlight that density functional calculations play indispensable role unveiling structure–activity correlation between plane catalytic activity. Finally, remaining challenges provided future prospects designing advanced electrocatalysts discussed.

Language: Английский

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Recent Advances in Engineered Ru‐Based Electrocatalysts for the Hydrogen/Oxygen Conversion Reactions

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(41)

Published: Sept. 1, 2022

Abstract The application of renewable energy conversion devices is considered as one the effective ways to alleviate shortage and environmental pollution. Designing electrocatalysts with excellent performance affordable price promising accelerate reaction process large‐scale application. At present, ruthenium (Ru)‐based nanomaterials have shown similar catalytic activity but superior demand compared commercial Pt/C. This undoubtedly makes Ru‐based a perfect candidate replace advanced Pt catalysts. Significant progress made in rational design electrocatalysts, an in‐depth understanding engineering strategies induced effects still at early stage. review summarizes modification for enhancing Ru, including surface structure, metal element, nonmetal size, bimetallic oxides, heterostructure strategies. Then electronic modulation generated by intramolecular intermolecular are elucidated. Further, engineered hydrogen oxygen reactions highlighted, correlations strategies, activity, pathways elaborated. Finally, challenges prospects presented future development practical nanomaterials.

Language: Английский

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High‐Valence Oxides for High Performance Oxygen Evolution Electrocatalysis

Advanced Science, Journal Year: 2023, Volume and Issue: 10(22)

Published: May 30, 2023

Valence tuning of transition metal oxides is an effective approach to design high-performance catalysts, particularly for the oxygen evolution reaction (OER) that underpins solar/electric water splitting and metal-air batteries. Recently, high-valence (HVOs) are reported show superior OER performance, in association with fundamental dynamics charge transfer intermediates. Particularly considered adsorbate mechanism (AEM) lattice oxygen-mediated (LOM). High-valence states enhance performance mainly by optimizing e

Language: Английский

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Advanced electrocatalysts with unusual active sites for electrochemical water splitting

InfoMat, Journal Year: 2023, Volume and Issue: 6(1)

Published: Nov. 27, 2023

Abstract Electrochemical water splitting represents a promising technology for green hydrogen production. To design advanced electrocatalysts, it is crucial to identify their active sites and interpret the relationship between structures performance. Materials extensively studied as electrocatalysts include noble‐metal‐based (e.g., Ru, Ir, Pt) non‐noble‐metal‐based 3d transition metals) compounds. Recently, advancements in characterization techniques theoretical calculations have revealed novel unusual sites. The present review highlights latest achievements discovery identification of various unconventional electrochemical splitting, with focus on state‐of‐the‐art strategies determining true establishing structure–activity relationships. Furthermore, we discuss remaining challenges future perspectives development next‐generation By presenting fresh perspective reaction involved this aims provide valuable guidance study industrial applications. image

Language: Английский

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Boosting ethanol oxidation by NiOOH-CuO nano-heterostructure for energy-saving hydrogen production and biomass upgrading

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 325, P. 122388 - 122388

Published: Jan. 7, 2023

Language: Английский

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Recent advances in Ru-based electrocatalysts for oxygen evolution reaction

Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 11(4), P. 1634 - 1650

Published: Dec. 29, 2022

Recently reported ruthenium (Ru)-based catalysts for the oxygen evolution reaction (OER) falling in Ru metal and compound subclasses are summarized with special emphasis being given to a discussion of activity/stability-enhancing strategies.

Language: Английский

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