Induced dipole moments in amorphous ZnCdS catalysts facilitate photocatalytic H2 evolution

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 23, 2024

Abstract Amorphous semiconductors without perfect crystalline lattice structures are usually considered to be unfavorable for photocatalysis due the presence of enriched trap states and defects. Here we demonstrate that breaking long-range atomic order in an amorphous ZnCdS photocatalyst can induce dipole moments generate strong electric fields within particles which facilitates charge separation transfer. Loading 1 wt.% low-cost Co-MoS x cocatalysts material increases H 2 evolution rate 70.13 mmol g −1 h , is over 5 times higher than its counterpart stable long-term up 160 h. A flexible 20 cm × /ZnCdS film prepared by a facile blade-coating technique numerous observable bubbles under natural sunlight, exhibiting potential scale-up solar production.

Language: Английский

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Boosting Hydrogen Adsorption via Manipulating the d-Band Center of Ferroferric Oxide for Anion Exchange Membrane-Based Seawater Electrolysis

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(9), P. 6981 - 6991

Published: April 19, 2024

Ferroferric oxide-based electrocatalysts are widely applied as hydrogen evolution reaction (HER) catalysts due to their low cost and good electrical conductivity, but they tend exhibit slow adsorption kinetics for HER poison by corrosive Cl– alkaline seawater splitting. In this regard, we report a nanosheet-like catalyst constructed decorating Fe3O4 with Ru P dual doping (Ru/P–Fe3O4@IF). situ characterization density functional theory (DFT) calculations demonstrate that the resulting Ru/P–Fe3O4@IF shows enhanced strength coverage thermal neutral free energy of adsorbed H (ΔGH*) modulating d-band center Fe3O4. Moreover, Ru/P moving up center, weak makes on active sites be avoided in Benefiting from above, exhibits superior performance commercial Pt/C overpotentials only −46 −144 mV reach 100 1000 mA cm–2, respectively. addition, AEM electrolyzer assembled Ru/P–Fe3O4 requires 1.93 V (cell voltage) drive current 2 A cm–2 can maintain stable operation more than h at 500

Language: Английский

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Systematic Constructing FeOCl/BiVO₄ Hetero‐Interfacial Hybrid Photoanodes for Efficient Photoelectrochemical Water Splitting

Small, Journal Year: 2024, Volume and Issue: unknown

Published: May 8, 2024

Abstract Bismuth vanadate (BiVO 4 ), as a promising photoanode for photoelectrochemical (PEC) water splitting, suffers from poor charge separation efficiency and light absorption efficiency. Herein, iron oxychloride (FeOCl) is introduced novel cocatalyst simply grafted on BiVO to construct an integrated photoanode, enhancing PEC performance. The optimized FeOCl/BiVO exhibits superior photocurrent density value of 5.23 mA cm −2 at 1.23 V versus reversible hydrogen electrode (RHE) under AM 1.5G illuminations. From experimental analysis, such high performance ascribed the unique properties FeOCl, facilitating transport, increasing efficiency, promoting oxidation kinetics. Density functional theory calculations further confirm that FeOCl optimizes Gibbs free energy H O‐containing intermediates (OOH * ) during processes, boosting catalytic kinetics splitting. This work presents catalyst constructing efficient water‐splitting photoanodes.

Language: Английский

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BiVO4 photoanodes with enhanced photoelectrochemical performance: Preparation, modification and emerging applications

Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: 217, P. 182 - 220

Published: Sept. 3, 2024

Language: Английский

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Tuning d–p Orbital Hybridization of NiMoO₄@Mo₁₅Se₁₉/NiSe₂ Core‐Shell Nanomaterials via Asymmetric Coordination Interaction Enables the Water Oxidation Process

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(20)

Published: April 3, 2024

Abstract The electrocatalytic performance of MoNi‐based nanomaterials undergo selenization has garnered significant interest due to their modified electronic structure, while still posses certain challenges for obtained bimetallic selenides. Here, a novel electrocatalyst NiMoO 4 @Mo 15 Se 19 /NiSe 2 core‐shell is constructed promote the desorption OOH * which can facilitate water oxidation process. nanoarrays show that “cores” are mainly nanorods “shells” selenides nanoflakes, super architectures expand more active sites and accelerate electron transfer. Moreover, hybridization interaction between Ni 3d, Mo 4d, 4p orbitals leads an asymmetric distribution electric clouds, decreases adsorption energy transformation oxygen‐containing species. Electrochemical data displays overpotentials only 195 mV, 220 224 mV oxygen evolution reaction (OER) in alkaline freshwater, simulated seawater, natural seawater. current density decay negligible after 100 h stability at about 1.46 V with three‐electrode system low cost unique this work provide constructive solution designing efficient stable OER catalysts future.

Language: Английский

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Electrocatalytic C–N coupling for urea synthesis: a critical review

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(9), P. 4908 - 4933

Published: Jan. 1, 2024

Strategies for building efficient electrocatalytic urea synthesis systems.

Language: Английский

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In situ Mo doping in NiS₂: enhancing electron density and stimulating electronic conductivity of Cu₃P–GDY for efficient photocatalytic hydrogen evolution

Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The electronic conductivity of a catalyst can be enhanced by strategically doping with specific elements.

Language: Английский

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A standalone bismuth vanadate-silicon artificial leaf achieving 8.4% efficiency for hydrogen production

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: March 21, 2025

Abstract The development of scalable photoelectrochemical water splitting with high solar-to-hydrogen efficiency and long-term stability is essential while challenging for practical application. Here, we design a BiVO 4 photoanode gradient distributed oxygen vacancies, which induces strong dipole fields to promote charge separation. Growing sea-urchin-like FeOOH cocatalyst on the leads photocurrent density 7.0 mA cm −2 at 1.23 V versus reversible hydrogen electrode stable over 520 h under AM 1.5 G illumination. By integrating silicon photovoltaic cell, standalone artificial leaf achieves 8.4%. scale-up these leaves up 441 2 in size can deliver 2.7% natural sunlight. Life cycle assessment analysis shows that solar has little environmental footprint production. Our study demonstrates possibility designing metal oxide-based

Language: Английский

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Recent Advances in Transition Metal Oxide Nanomaterials for Solar Cell Applications: A Status Review and Technology Perspectives

Materials Research Bulletin, Journal Year: 2025, Volume and Issue: unknown, P. 113351 - 113351

Published: Feb. 1, 2025

Language: Английский

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Strong Lewis acid-induced self-healing of loose FeOOH for alkaline oxygen evolution

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 487, P. 150253 - 150253

Published: March 8, 2024

Language: Английский

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