Work‐function‐induced Interfacial Built‐in Electric Fields in Os‐OsSe₂Heterostructures for Active Acidic and Alkaline Hydrogen Evolution

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(36)

Опубликована: Июль 13, 2022

Theoretical calculations unveil that the formation of Os-OsSe2 heterostructures with neutralized work function (WF) perfectly balances electronic state between strong (Os) and weak (OsSe2 ) adsorbents bidirectionally optimizes hydrogen evolution reaction (HER) activity Os sites, significantly reducing thermodynamic energy barrier accelerating kinetics process. Then, heterostructural is constructed for first time by a molten salt method confirmed in-depth structural characterization. Impressively, due to highly active sites endowed charge balance effect, exhibits ultra-low overpotentials HER in both acidic (26 mV @ 10 mA cm-2 alkaline (23 media, surpassing commercial Pt catalysts. Moreover, solar-to-hydrogen device assembled further highlights its potential application prospects. Profoundly, this special heterostructure provides new model rational selection heterocomponents.

Язык: Английский

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Recent advances in interface engineering strategy for highly‐efficient electrocatalytic water splitting

InfoMat, Год журнала: 2022, Номер 5(1)

Опубликована: Окт. 13, 2022

Abstract The hydrogen energy generated by the electrocatalytic water splitting reaction has been established as a renewable and clean carrier with ultra‐high density, which can well make up for shortcomings of conventional sources, such geographical limitations, climatic dependence, wastage. Notably, introduction electrocatalysts enhance efficiency process to generate hydrogen. Particularly, heterostructure constructed coupling multiple components (or phases) have emerged most promising option due well‐known electronic synergistic effects. existing reviews on interface engineering electrocatalyst design mostly focus relationship between heterostructures specific reactions. However, comprehensive overview integration model building, directional synthesis, mechanism rarely reported. To this end, in review, development catalysts is systematically introduced from perspective classification, growth regulation performance based interfacial microenvironment (bonding, configuration, lattice strain, etc.), thereby offering useful insights construction models. Besides, combined current applications strategies, challenges future are discussed relevant solutions proposed. Overall, review serve theoretical reference mechanism, further promote production technologies low consumption high yield. image

Язык: Английский

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Catalytic properties of borophene/MoS₂ heterojunctions for hydrogen evolution reaction under different stacking conditions

Journal of Materials Chemistry A, Год журнала: 2022, Номер 10(46), С. 24866 - 24876

Опубликована: Янв. 1, 2022

Borophene and MoS 2 are promising two-dimensional functional materials because of their advantageous high specific surface areas.

Язык: Английский

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Interfacial electronic structure modulation of CoP nanowires with FeP nanosheets for enhanced hydrogen evolution under alkaline water/seawater electrolytes

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 317, С. 121799 - 121799

Опубликована: Июль 27, 2022

Язык: Английский

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Interfacial electronic structure modulation of Ni2P/Ni5P4 heterostructure nanosheets for enhanced pH-universal hydrogen evolution reaction performance

Chemical Engineering Journal, Год журнала: 2023, Номер 464, С. 142538 - 142538

Опубликована: Март 21, 2023

Язык: Английский

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Interfacial Mediation by Sn And S Vacancies of p‐SnS/n‐ZnIn₂S₄ for Enhancing Photocatalytic Hydrogen Evolution with New Scheme of Type‐I Heterojunction

Advanced Functional Materials, Год журнала: 2023, Номер 33(50)

Опубликована: Авг. 27, 2023

Abstract The construction of interfacial electric field (IEF) in semiconductor heterojunction is great significance boosting photocatalytic hydrogen evolution through efficient separation photogenerated charge‐carriers. However, the exploitation IEF type‐I has not been proposed for designing photocatalysts. Herein, based on density functional theory prediction, p ‐SnS with different work functions modulated by Sn‐vacancy are compounded n ‐ZnIn 2 S 4 containing S‐vacancy to form heterojunction. optimized SnS/ZnIn photocatalyst without co‐catalysts exhibits an impressive rate 22.75 mmol g −1 h , 6.23 times ZnIn . Systematic investigations reveal that Sn‐S bond acts as a transport channel accelerates interface charge‐carriers transfer under promotion originating from significant Fermi level difference. A large difference surface photovoltage signal and achieved effective IEF. new p‐n scheme induced mediation can separate charge‐carriers, retain highly reductive electrons evolution, overcoming disadvantage reduction potential decline typical scheme. This study will afford theoretical basis achievement high‐efficiency modulation.

Язык: Английский

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Recent Advances in Doping Strategies to Improve Electrocatalytic Hydrogen Evolution Performance of Molybdenum Disulfide

ACS Catalysis, Год журнала: 2024, Номер 14(7), С. 4601 - 4637

Опубликована: Март 12, 2024

The exhaustion of fossil fuels and resultant pollution issues have prompted the world to look clean, nonpolluting hydrogen energy. promising approach electrocatalytic evolution reaction (HER) presents a solution for addressing energy environmental challenges. Consequently, creating high-performance cost-effective electrocatalysts is essential efficient decomposition water. Molybdenum disulfide (MoS2) has emerged as most among potential replace platinum. However, only edge-site MoS2 active HER due semiconductive nature large inactive basal planes. Doping various substances, which significantly improves activity, can enhance MoS2's physical chemical properties. Our Review encapsulates latest strategies research advancements in choosing heteroatomic-doped production. Various doping elements impart unique properties MoS2. Specifically, with noble metals (e.g., Ag, Pt, Ru, Pd, Rh) transition Fe, V, Ni, Mn, Co, Zn, W), well codoping multiple metal atoms Cu-Pd, Pt-Te, Co-Nb, Ni-Co), conductivity introduce new sites. These dopants are recognized activating plane MoS2, thereby enhancing activity. Furthermore, nonmetallic N, F, P, An, O) their combinations O-P, N-F, Se-O), nonmetal Co-Se, Co-P, N-Pt, Ru-O), crucial inducing phase conversions improving stability. Each dopant contributes distinctively, either by stability serving catalytic site, or broadening pH range effective HER. In this discussion, we further explore current challenges outlook area. discuss existing guidelines future on MoS2-based catalyst, offering advice translation from laboratory large-scale industrial

Язык: Английский

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Enhanced alkaline hydrogen evolution reaction of MoO2/Ni3S2 nanorod arrays by interface engineering

Nano Energy, Год журнала: 2024, Номер 122, С. 109299 - 109299

Опубликована: Янв. 17, 2024

Язык: Английский

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Hollow Ni/NiO/C composite derived from metal-organic frameworks as a high-efficiency electrocatalyst for the hydrogen evolution reaction

Nano Convergence, Год журнала: 2023, Номер 10(1)

Опубликована: Фев. 2, 2023

Metal-organic frameworks (MOFs) constitute a class of crystalline porous materials employed in storage and energy conversion applications. MOFs possess characteristics that render them ideal the preparation electrocatalysts, exhibit excellent performance for hydrogen evolution reaction (HER). Herein, H-Ni/NiO/C catalysts were synthesized from Ni-based MOF hollow structure via two-step process involving carbonization oxidation. Interestingly, catalyst was superior to those H-Ni/C, H-NiO/C, NH-Ni/NiO/C HER. Notably, exhibited best electrocatalytic activity HER, with low overpotential 87 mV 10 mA cm-2 Tafel slope 91.7 dec-1. The high is ascribed synergistic effect metal/metal oxide architecture, which favorable breaking H-OH bond, forming atoms, enabling charge transport. These results indicate approach promising fabricating cost-effective production alkaline media.

Язык: Английский

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Shape-Controlled Synthesis of Platinum-Based Nanocrystals and Their Electrocatalytic Applications in Fuel Cells

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

Опубликована: Март 31, 2023

Abstract To achieve environmentally benign energy conversion with the carbon neutrality target via electrochemical reactions, innovation of electrocatalysts plays a vital role in enablement renewable resources. Nowadays, Pt-based nanocrystals (NCs) have been identified as one class most promising candidates to efficiently catalyze both half-reactions hydrogen- and hydrocarbon-based fuel cells. Here, we thoroughly discuss key achievement developing shape-controlled Pt NCs, their applications We begin mechanistic discussion on how morphology can be precisely controlled colloidal system, followed by highlighting advanced development Pt, Pt-alloy, core@shell nanocages, intermetallic compounds. then select some case studies models typical reactions (oxygen reduction reaction at cathode small molecular oxidation anode) that are enhanced nanocatalysts. Finally, provide an outlook potential challenges nanocatalysts envision perspective suggestions. "Image missing"

Язык: Английский

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