Amorphous/Crystalline Heterostructure Transition-Metal-based Catalysts for High-Performance Water Splitting

Coordination Chemistry Reviews, Год журнала: 2022, Номер 475, С. 214916 - 214916

Опубликована: Окт. 31, 2022

Язык: Английский

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Self‐integration exactly constructing oxygen‐modified MoNi alloys for efficient hydrogen evolution

EcoEnergy, Год журнала: 2023, Номер 1(2), С. 425 - 436

Опубликована: Дек. 1, 2023

Abstract Introducing oxygen atoms into nickel‐based alloys is an effective strategy for constructing water dissociation sites hydrogen evolution reaction (HER). However, controlling content to realize the best match of and adsorption challenging. Herein, we exploit self‐integration process MoNi alloy in molten salts introduce atoms, which ultimately leads localized generation robust NiO x H y around alloys. Interestingly, Mo further doped (Mo‐NiO ) construct active center due high mobility ionic solutions. Owing covering space confinement salt, exactly decorated with Mo‐NiO nanosheets. Both physical characterization density functional theory calculation prove that electron transport, capability, are finely tuned benefited from O doping, thus greatly expediting HER kinetics. exhibits a much lower overpotential 33 mV at 10 cm −2 alkaline electrolyte, even superior Pt/C benchmark. Moreover, final requires low 57 acidic media. This enhancement ascribed successful assembly foam elicited by salt.

Язык: Английский

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Recent Progress in Transition-Metal Sulfide Catalyst Regulation for Improved Oxygen Evolution Reaction

Energy & Fuels, Год журнала: 2022, Номер 36(13), С. 6675 - 6694

Опубликована: Июнь 23, 2022

Electrochemical hydrogen production is considered the most reliable approach to transfer renewable energies chemical energy─namely, hydrogen─for storage, and intensive attention has been directed nonprecious catalyst development for water splitting reactions. Among candidates, metal sulfides have extensively explored as an emerging electrocatalyst material oxygen evolution reaction (OER) in reaction, because of their abundant active centers, good electrical conductivity, high intrinsic activity. By optimizing structure states, some advanced catalysts reported recently, which was instructive inspiring novel development. Herein, recent advances electrocatalytic performance optimization strategies transition-metal sulfide OER are reviewed systematically comprehensively. The fundamental catalytic mechanism key parameters first presented then followed by physicochemical properties sulfides, could be helpful understanding correlation between performance. Importantly, activity boosted general strategies, terms defect/vacancy effect, lattice mismatch, phase engineering, heterostructure, doping mainly discussed this work. challenges opportunities related further materials with long-term durability finally proposed. It can concluded that these regulatory largely improve increasing site exposure reducing energy barrier In addition, problems future improving presented, provides beneficial enlightenment guidance efficient low-cost electrocatalysts future. Hopefully, effort would design preparation OER.

Язык: Английский

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Iridium-based catalysts for oxygen evolution reaction in acidic media: Mechanism, catalytic promotion effects and recent progress

Deleted Journal, Год журнала: 2023, Номер 2, С. e9120056 - e9120056

Опубликована: Фев. 25, 2023

Iridium (Ir)-based catalysts are highly efficient for the anodic oxygen evolution reaction (OER) due to high stability and anti-corrosion ability in strong acid electrolyte. Recently, intensive attention has been directed novel, efficient, low-cost Ir-based overcome challenges of their application water electrolysis technique. To make a comprehensive understanding recently developed catalytic properties, mechanism promotion principles were discussed OER condition aimed proton exchange membrane electrolyzer (PEMWE) this review. The mechanisms adsorbate lattice first presented easy mechanism; brief perspective analysis from aspects geometric effect, electronic synergistic defect engineering, support effect was concluded. Then, latest progress practical introduced detail, which classified into varied composition Ir catalyst terms alloys, hetero-element doping, perovskite, pyrochlore, heterostructure, core–shell structure, supported catalysts. Finally, problems faced by current acidic electrolyte put forward. It is concluded that with low loading should be future, paid probing structural performance correlation, real PEMWE devices.Hopefully, effort can helpful catalysis OER, instructive novel design fabrication.

Язык: Английский

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Duplex Interpenetrating-Phase FeNiZn and FeNi3 Heterostructure with Low-Gibbs Free Energy Interface Coupling for Highly Efficient Overall Water Splitting

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Апрель 10, 2023

Abstract The sluggish kinetics of both hydrogen evolution reaction (HER) and oxygen (OER) generate the large overpotential in water electrolysis thus high-cost production. Here, multidimensional nanoporous interpenetrating-phase FeNiZn alloy FeNi 3 intermetallic heterostructure is situ constructed on NiFe foam (FeNiZn/FeNi @NiFe) by dealloying protocol. Coupling with eminent synergism among specific constituents highly efficient mass transport from integrated porous backbone, FeNiZn/FeNi @NiFe depicts exceptional bifunctional activities for splitting extremely low overpotentials toward OER HER ( η 1000 = 367/245 mV) as well robust durability during 400 h testing alkaline solution. as-built electrolyzer anode cathode exhibits record-high performances sustainable output terms much lower cell voltage 1.759 1.919 V to deliver current density 500 mA cm −2 long working lives. Density functional theory calculations disclose that interface interaction between generates modulated electron structure state optimized intermediate chemisorption, diminishing energy barriers production splitting. With merits fine performances, scalable fabrication, cost, holds prospective application potential electrocatalyst splitting."Image missing"

Язык: Английский

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An overview of heteroatom doped cobalt phosphide for efficient electrochemical water splitting

Chemical Engineering Journal, Год журнала: 2022, Номер 456, С. 141056 - 141056

Опубликована: Дек. 21, 2022

Язык: Английский

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Recent Advances in Co‐Based Electrocatalysts for Hydrogen Evolution Reaction

Small, Год журнала: 2023, Номер 19(45)

Опубликована: Июль 11, 2023

Abstract Water splitting is a promising technique in the sustainable “green hydrogen” generation to meet energy demands of modern society. Its industrial application heavily dependent on development novel catalysts with high performance and low cost for hydrogen evolution reaction (HER). As typical non‐precious metal, cobalt‐based have gained tremendous attention recent years shown great prospect commercialization. However, complexity composition structure newly‐developed Co‐based make it urgent comprehensively retrospect summarize their advance design strategies. Hence, this review, mechanism HER first introduced possible role Co component during electrocatalysis discussed. Then, various strategies that could effectively enhance intrinsic activity are summarized, including surface vacancy engineering, heteroatom doping, phase facet regulation, heterostructure construction, support effect. The progress advanced electrocatalysts discussed, emphasizing above can significantly improve by regulating electronic optimizing binding crucial intermediates. At last, prospects challenges according viewpoint from fundamental explorations applications.

Язык: Английский

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Ultrafast fabrication of nanospherical CoFe alloys for boosting electrocatalytic water oxidation

International Journal of Hydrogen Energy, Год журнала: 2023, Номер 48(87), С. 34009 - 34017

Опубликована: Июнь 4, 2023

Язык: Английский

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Crystal-Phase Engineering in Heterogeneous Catalysis

Chemical Reviews, Год журнала: 2023, Номер 124(1), С. 164 - 209

Опубликована: Дек. 4, 2023

The performance of a chemical reaction is critically dependent on the electronic and/or geometric structures material in heterogeneous catalysis. Over past century, Sabatier principle has already provided conceptual framework for optimal catalyst design by adjusting structure catalytic via change composition. Beyond composition, it essential to recognize that atomic catalyst, encompassing terraces, edges, steps, kinks, and corners, have substantial impact activity selectivity reaction. Crystal-phase engineering capacity bring about alterations configurations enabling control over coordination numbers, morphological features, arrangement surface atoms. Modulating crystallographic phase therefore an important strategy improving stability, activity, materials. Nonetheless, complete understanding how depends crystal remains elusive, primarily due absence molecular-level view active sites across various phases. In this review, we focus assessing dependence phases elucidate challenges complexities inherent catalysis, ultimately aiming improved design.

Язык: Английский

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Phase engineering oriented defect-rich amorphous/crystalline RuO ₂ nanoporous particles for boosting oxygen evolution reaction in acid media

Deleted Journal, Год журнала: 2023, Номер 2, С. e9120070 - e9120070

Опубликована: Май 5, 2023

Imposing phase engineering to porous materials is promising realize outperforming electrocatalytic performances by taking advantages of the merits nanoarchitecture and heterophase structure. In this work, amorphous/crystalline ruthenium oxide (RuO₂) particles with rationally regulated heterophases are successfully prepared integrating into material synthesis. The resultant defect-rich RuO₂ exhibit excellent performance toward oxygen evolution reaction, achieving a low overpotential 165 mV at current density 10 mA·cm⁻² high mass activity up 133.8 200 mV. This work indicates that synergistic effect structural characteristics enables trigger superior activity.

Язык: Английский

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