Isolated Fe-Co heteronuclear diatomic sites as efficient bifunctional catalysts for high-performance lithium-sulfur batteries

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Jan. 18, 2023

The slow redox kinetics of polysulfides and the difficulties in decomposition Li2S during charge discharge processes are two serious obstacles to practical application lithium-sulfur batteries. Herein, we construct Fe-Co diatomic catalytic materials supported by hollow carbon spheres achieve high-efficiency catalysis for conversion simultaneously. Fe atom center is beneficial accelerate reaction process, Co favorable charging process. Theoretical calculations combined with experiments reveal that this excellent bifunctional activity originates from synergy between atom. As a result, assembled cells exhibit high rate performance (the specific capacity achieves 688 mAh g-1 at 5 C) cycle stability decay 0.018% 1000 cycles 1 C).

Language: Английский

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Single atoms meet metal–organic frameworks: collaborative efforts for efficient photocatalysis

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(9), P. 3722 - 3749

Published: Jan. 1, 2022

MOF-supported single atom materials offer great potential for design and engineering of advanced photocatalysts energy conversion applications. State-of-the-art prospects in recent breakthroughs are presented this review.

Language: Английский

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High quantum efficiency of hydrogen production from methanol aqueous solution with PtCu–TiO2 photocatalysts

Nature Materials, Journal Year: 2023, Volume and Issue: 22(5), P. 619 - 626

Published: April 10, 2023

Language: Английский

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Hollow Nanoboxes Cu_2‐xS@ZnIn₂S₄ Core‐Shell S‐Scheme Heterojunction with Broad‐Spectrum Response and Enhanced Photothermal‐Photocatalytic Performance

Small, Journal Year: 2022, Volume and Issue: 18(31)

Published: June 12, 2022

Major issues in photocatalysis include improving charge carrier separation efficiency at the interface of semiconductor photocatalysts and rationally developing efficient hierarchical heterostructures. Surface continuous growth deposition is used to make hollow Cu2-x S nanoboxes, then simple hydrothermal reaction core-shell S@ZnIn2 S4 S-scheme heterojunctions. The photothermal photocatalytic performance improved. In an experimental hydrogen production test, photocatalyst produces 4653.43 µmol h-1 g-1 hydrogen, which 137.6 13.8 times higher than pure ZnIn2 , respectively. Furthermore, exhibits a high tetracycline degradation water up 98.8%. For reactions, configuration gives large specific surface area more reactive sites. response range broadened, infrared light absorption enhanced, effect outstanding, process promoted. Meanwhile, characterizations, studies, active species trapping investigations, energy band structure analysis, theoretical calculations all reveal that heterojunction can efficiently increase photogenerated separation. This research opens new possibilities for future catalyst design development.

Language: Английский

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Catalytic Activity Enhancement on Alcohol Dehydrogenation via Directing Reaction Pathways from Single- to Double-Atom Catalysis

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(11), P. 4913 - 4924

Published: March 9, 2022

To further improve the intrinsic reactivity of single-atom catalysts (SACs), controllable modification a single site by coordinating with second neighboring metal atom, developing double-atom (DACs), affords new opportunities. Here we report catalyst that features two bonded Fe-Co double atoms, which is well represented an FeCoN6(OH) ensemble 100% dispersion, work together to switch reaction mechanism in alcohol dehydrogenation under oxidant-free conditions. Compared Fe-SAC and Co-SAC, FeCo-DAC displays higher activity performance, yielding desired products up 98% yields. Moreover, broad diversity benzyl alcohols aliphatic convert into corresponding dehydrogenated excellent yields high selectivity. The kinetic results show lower activation energy obtained than Co-SAC. computational studies demonstrate path DACs different from SACs, providing rationale for observed enhancements.

Language: Английский

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In situprotonated-phosphorus interstitial doping induces long-lived shallow charge trapping in porous C_3−xN₄photocatalysts for highly efficient H₂generation

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 16(2), P. 460 - 472

Published: Dec. 5, 2022

Efficient photocatalytic solar-to-H 2 conversion is pivotal to zero-carbon energy supply.

Language: Английский

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Mechanistic Insight into the Synergy between Platinum Single Atom and Cluster Dual Active Sites Boosting Photocatalytic Hydrogen Evolution

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(25)

Published: March 28, 2023

In the energy transition context, design and synthesis of high-performance Pt-based photocatalysts with low Pt content ultrahigh atom-utilization efficiency for hydrogen production are essential. Herein, a facile approach decorating atomically dispersed cocatalysts having single-atom (SA) atomic cluster (C) dual active sites on CdS nanorods (PtSA+C /CdS) via layer deposition is reported. The size cocatalyst spatial intimacy precisely engineered at scale. PtSA+C /CdS show optimized photocatalytic evolution activity, achieving reaction rate 80.4 mmol h-1 g-1 , which 1.6- 7.3-fold higher than those PtSA PtNP photocatalysts, respectively. Thorough characterization theoretical calculations reveal that enhanced activity due to remarkable synergy between SAs clusters as sites, responsible water adsorption-dissociation desorption, A similar synergetic effect found in representative Pt/TiO2 system, indicating generality strategy. This study demonstrates significance enhancing efficiency, opening new avenue rational high efficiency.

Language: Английский

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Industrial status, technological progress, challenges, and prospects of hydrogen energy

Natural Gas Industry B, Journal Year: 2022, Volume and Issue: 9(5), P. 427 - 447

Published: Oct. 1, 2022

Under the requirements of China's strategic goal "carbon peaking and carbon neutrality", as a renewable, clean efficient secondary energy source, hydrogen benefits from abundant resources, wide variety sources, high combustion calorific value, non-polluting, various forms utilization, storage mediums good security, etc. It will become realistic way to help energy, transportation, petrochemical other fields achieve deep decarbonization, turn into an important replacement source for China build modern system. is clear that accelerating development has global consensus. In order provide theoretical support accelerated transformation hydrogen-related industries companies, basis reference construction "Hydrogen Energy China", this paper describes main key technological progresses in industry chain such production, storage, application. The status trends industrialization are analyzed, then challenges faced by discussed. At last, future prospected. following conclusions achieved. (1) Hydrogen technologies our country mature enter road industrialization. whole system gradually being formed, realize leap-forward gray hydrogen, blue green hydrogen. (2) overall entire fuel cells, refueling stations scenarios should be accelerated. Besides, in-depth integration coordination with oil gas needs more attention, which rapidly promote high-quality (3) promotion implementation major projects "north-east transmission", "west-east "sea landing", utilization infrastructures filling stations, can give full play innate advantages companies industrial nodes production refueling, etc., application "oil, gas, electricity" four-station joint construction, form nationwide resource guarantee system, accelerate planning China" strategy.

Language: Английский

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Photothermal catalysis: From fundamentals to practical applications

Materials Today, Journal Year: 2023, Volume and Issue: 68, P. 234 - 253

Published: July 17, 2023

Photothermal catalysis is an innovative approach that integrates photochemical and thermocatalytic processes to enable efficient use of full-spectrum sunlight in catalyzing various chemical reactions for energy conversion environmental governance. This has demonstrated competitive performance efficiency compared conventional techniques, making it suitable large-scale applications. In this review, we will comprehensively examine the fundamentals classification photothermal discuss detailed design principles types catalysts, focusing on enhancing solar light absorption, improving internal electric field more energetic hot carriers (EHC) localized thermal (LTE), interfacial engineering robust directed EHC transferring, regulating LTE continuous 24/7 operation. We also report a diverse range reactions. Moreover, introduce latest technologies synthesizing catalysts advanced concentrators pilot testing production fuels at scale. Finally, future opportunities challenges promising but fledging be discussed, which expected transform industries into clean sustainable manner.

Language: Английский

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Enhanced Interfacial Electron Transfer by Asymmetric Cu‐O_v‐In Sites on In₂O₃ for Efficient Peroxymonosulfate Activation

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(11)

Published: Jan. 17, 2023

Enhancing the peroxymonosulfate (PMS) activation efficiency to generate more radicals is vital promote Fenton-like reaction activity, however, how PMS adsorption and accelerate interfacial electron transfer boost its kinetics remains a great challenge. Herein, we prepared Cu-doped defect-rich In2 O3 (Cu-In2 /Ov ) catalysts containing asymmetric Cu-Ov -In sites for in water purification. The intrinsic catalytic activity that side-on configuration of O-O bond (Cu-O-O-In) at significantly stretches length. Meanwhile, increase density near Fermi energy level, promoting faster generating SO4 ⋅- ⋅OH. degradation rate constant tetracycline achieved by Cu-In2 31.8 times than , it shows possibility membrane reactor practical wastewater treatment.

Language: Английский

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