Designing a Built-In Electric Field for Efficient Energy Electrocatalysis

ACS Nano, Journal Year: 2022, Volume and Issue: 16(12), P. 19959 - 19979

Published: Dec. 15, 2022

To utilize intermittent renewable energy as well achieve the goals of peak carbon dioxide emissions and neutrality, various electrocatalytic devices have been developed. However, reactions, e.g., hydrogen evolution reaction/oxygen reaction in overall water splitting, polysulfide conversion lithium–sulfur batteries, formation/decomposition lithium peroxide lithium–oxygen nitrate reduction to degrade sewage, suffer from sluggish kinetics caused by multielectron transfer processes. Owing merits accelerated charge transport, optimized adsorption/desorption intermediates, raised conductivity, regulation microenvironment, ease combine with geometric characteristics, built-in electric field (BIEF) is expected overcome above problems. Here, we give a Review about very recent progress BIEF for efficient electrocatalysis. First, construction strategies characterization methods (qualitative quantitative analysis) are summarized. Then, up-to-date overviews engineering electrocatalysis, attention on electron structure optimization microenvironment modulation, analyzed discussed detail. In end, challenges perspectives proposed. This gives deep understanding design electrocatalysts next-generation storage devices.

Language: Английский

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Lattice‐Strain Engineering for Heterogenous Electrocatalytic Oxygen Evolution Reaction

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(39)

Published: Jan. 14, 2023

Abstract The energy efficiency of metal–air batteries and water‐splitting techniques is severely constrained by multiple electronic transfers in the heterogenous oxygen evolution reaction (OER), high overpotential induced sluggish kinetics has become an uppermost scientific challenge. Numerous attempts are devoted to enabling activity, selectivity, stability via tailoring surface physicochemical properties nanocatalysts. Lattice‐strain engineering as a cutting‐edge method for tuning geometric configuration metal sites plays pivotal role regulating interaction catalytic surfaces with adsorbate molecules. By defining d‐band center descriptor structure–activity relationship, individual contribution strain effects within state‐of‐the‐art electrocatalysts can be systematically elucidated OER optimization mechanism. In this review, fundamentals advancements strain‐catalysts showcased innovative trigger strategies enumerated, particular emphasis on feedback mechanism between precise regulation lattice‐strain optimal activity. Subsequently, modulation various attributes categorized impediments encountered practicalization strained effect discussed, ending outlook future research directions burgeoning field.

Language: Английский

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Metal–Organic Frameworks as Electrocatalysts

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(9)

Published: Dec. 5, 2022

Abstract Transition metal complexes are well‐known homogeneous electrocatalysts. In this regard, metal–organic frameworks (MOFs) can be considered as an ensemble of transition ordered in a periodic arrangement. addition, MOFs have several additional positive structural features that make them suitable for electrocatalysis, including large surface area, high porosity, and content accessible with exchangeable coordination positions. The present review describes the current state use electrocatalysts, both host electroactive guests their direct electrocatalytic activity, particularly case bimetallic MOFs. field MOF‐derived materials is purposely not covered, focusing on or its composites Special attention has been paid to strategies overcome poor electrical conductivity limited stability.

Language: Английский

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Tuning the Coordination Environment of Carbon‐Based Single‐Atom Catalysts via Doping with Multiple Heteroatoms and Their Applications in Electrocatalysis

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(38)

Published: Feb. 13, 2023

Abstract Carbon‐based single‐atom catalysts (SACs) are considered to be a perfect platform for studying the structure–activity relationship of different reactions due adjustability their coordination environment. Multi‐heteroatom doping has been demonstrated as an effective strategy tuning environment carbon‐based SACs and enhancing catalytic performance in electrochemical reactions. Herein, recently developed strategies multi‐heteroatom doping, focusing on regulation active sites by heteroatoms shells, summarized. In addition, correlation between activity investigated through representative experiments theoretical calculations various Finally, concerning certain shortcomings current multi‐heteroatoms, some suggestions put forward promote development field electrocatalysis.

Language: Английский

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Confined interface engineering of self-supported Cu@N-doped graphene for electrocatalytic CO2 reduction with enhanced selectivity towards ethanol

Nano Research, Journal Year: 2022, Volume and Issue: 15(10), P. 8872 - 8879

Published: July 27, 2022

Language: Английский

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Confinement Engineering of Electrocatalyst Surfaces and Interfaces

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(46)

Published: Sept. 9, 2022

Abstract The electrocatalytic performance of nanomaterials can be enhanced by fine‐tuning the coordination environment and number low‐coordination atoms. Confinement engineering is most effective strategy for precise chemical synthesis electrocatalysts through modulation electron transfer properties, atomic arrangement, molecular structure in a confined region. It not only alters environments to adjust formation mechanism active centers, but also regulates physicochemical properties electrocatalysts. Consequently, nucleation, transportation, stabilization intermediate species electrocatalysis are optimized, then improve covering activity, stability, selectivity. In this review, confinement introduced terms definition, classification, construction, basic principles. Then, latest advances oxygen reduction reaction, hydrogen evolution nitrogen carbon dioxide reaction systematically evaluated. Furthermore, using representative experimental results theoretical calculations, structure‐activity relationships between illustrated. Finally, potential challenges future development prospects highlighted, with focus on controlling construction environments, investigating uncommon catalytic regions, practical applications.

Language: Английский

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RuO₂–CeO₂ Lattice Matching Strategy Enables Robust Water Oxidation Electrocatalysis in Acidic Media via Two Distinct Oxygen Evolution Mechanisms

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(5), P. 3298 - 3307

Published: Feb. 15, 2024

The discovery of acid-stable and highly active electrocatalysts for the oxygen evolution reaction (OER) is crucial in quest high-performance water-splitting technologies. Herein, a heterostructured RuO2–CeO2 electrocatalyst was constructed by using lattice-matching strategy. interfacial Ru–O–Ce bridge structure provided channel electron transfer between Ru Ce, creating lattice stress that distorts local RuO2. resulting catalyst exhibited attractive stability with negligible decay after 1000 h OER 0.5 M H2SO4, along high activity an overpotential only 180 mV at 10 mA cm–2. In situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS), differential electrochemical mass spectrometry (DEMS), density functional theory (DFT) calculations were used to reveal interface noninterface RuO2 sites enabled oxide path mechanism (OPM) enhanced adsorbate (AEM-plus), respectively, during OER. simultaneous independent pathways accessible matching guides improved design acidic media.

Language: Английский

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Electrocatalytic reduction of carbon dioxide in confined microspace utilizing single nickel atom decorated nitrogen-doped carbon nanospheres

Nano Energy, Journal Year: 2023, Volume and Issue: 111, P. 108384 - 108384

Published: March 24, 2023

Language: Английский

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Electrocatalysts in lithium-sulfur batteries

Nano Research, Journal Year: 2023, Volume and Issue: 16(4), P. 4438 - 4467

Published: Jan. 3, 2023

Language: Английский

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Competitive Trapping of Single Atoms onto a Metal Carbide Surface

ACS Nano, Journal Year: 2023, Volume and Issue: 17(7), P. 6955 - 6965

Published: March 27, 2023

Controlling atomic adjustment of single-atom catalysts (SACs) can directly change its local configuration, regulate the energy barrier intermediates, and further optimize reaction pathways. Herein, we report an atom manipulating process to synthesize Ni atoms stabilized on vanadium carbide (NiSA-VC) through a nanofiber-medium thermodynamically driven migration strategy. Experimental theoretical results systematically reveal tunable pathway from nanoparticles neighboring N-doped carbon (NC) finally metal that was obtained by regulating competitive adsorption energies between VC NC for capturing atoms. For CO2-to-CO electroreduction, NiSA-VC exhibits industrial current density -180 mA cm-2 at -1.0 V vs reversible hydrogen electrode highest Faradaic efficiency CO production (FECO) 96.8% -0.4 RHE in flow cell. Significant electron transfers occurring structures contribute activation CO2, facilitate free energy, *CO desorption as rate-determining step, promote activity selectivity. This study provides understanding how design powerful SACs electrocatalysis.

Language: Английский

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