Unprecedented urea oxidation on Zn@Ni-MOF with an ultra-high current density: understanding the competition between UOR and OER, catalytic activity limitation and reaction selectivity

Journal of Materials Chemistry A, Год журнала: 2023, Номер 11(27), С. 14870 - 14877

Опубликована: Янв. 1, 2023

Zn-doping populates the catalytically active Ni 3+ -OOH sites, and subsequently prevents detrimental competition between UOR OER. Consequently, Zn@Ni-MOF demonstrates an outstanding ultra-high current density.

Язык: Английский

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Dual transfer channels of photo-carriers in 2D/2D/2D sandwich-like ZnIn2S4/g-C3N4/Ti3C2 MXene S-scheme/Schottky heterojunction for boosting photocatalytic H2 evolution

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Год журнала: 2022, Номер 43(10), С. 2720 - 2731

Опубликована: Янв. 1, 2022

Язык: Английский

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Manipulating electron redistribution induced by asymmetric coordination for electrocatalytic water oxidation at a high current density

Science Bulletin, Год журнала: 2023, Номер 68(13), С. 1389 - 1398

Опубликована: Июнь 3, 2023

Язык: Английский

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Interfacial component coupling effects towards precise heterostructure design for efficient electrocatalytic water splitting

Nano Energy, Год журнала: 2022, Номер 103, С. 107753 - 107753

Опубликована: Авг. 27, 2022

Язык: Английский

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Engineering strategies and active site identification of MXene-based catalysts for electrochemical conversion reactions

Chemical Society Reviews, Год журнала: 2023, Номер 52(9), С. 3215 - 3264

Опубликована: Янв. 1, 2023

This review summarizes engineering strategies to modify MXene-based catalysts and their active site identification for applications in electrochemical conversion reactions.

Язык: Английский

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Nature‐Inspired Interconnected Macro/Meso/Micro‐Porous MXene Electrode

Advanced Functional Materials, Год журнала: 2023, Номер 33(12)

Опубликована: Янв. 8, 2023

Abstract The geometric multiplication development of MXene has promoted it to become a star material in numerous applications including, but not limited to, energy storage. It is found that pore structure modulation engineering can improve the inherent properties MXene, turn significantly enhancing its electrochemical performance. However, most current works have focused on exploring structure‐effective relationships single‐scale regulation MXene. Inspired by Murray's law from nature where highly graded organisms discovered and used achieve effective diffusion maximize mass transfer, hierarchically interconnected porous electrode across micro‐meso‐macroporous constructed. This MXene‐based provides large amounts active sites while greatly shortening ion channel. Finally, zinc microcapacitor based this exhibits an ultrahigh area‐specific capacitance up 410 mF cm −2 density 103 µWh at power 2100 µW . areal outperforms currently reported microcapacitors. study supports strategy for materials (including MXene) ultra‐short channels maximum transport efficiency next‐generation high‐performance

Язык: Английский

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Interface Engineering in 2D/2D Heterogeneous Photocatalysts

Small, Год журнала: 2022, Номер 19(5)

Опубликована: Дек. 7, 2022

Assembling different 2D nanomaterials into heterostructures with strong interfacial interactions presents a promising approach for novel artificial photocatalytic materials. Chemically implementing the nanomaterials' construction/stacking modes to regulate interfaces can extend their functionalities and achieve good performance. Herein, based on fundamental principles photochemical processes, multiple construction (e.g., face-to-face, edge-to-face, interface-to-face, edge-to-edge) are overviewed systematically emphasis relationships between characteristics point, linear, planar), synthetic strategies in situ growth, ex assembly), enhanced applications precise regulation. Meanwhile, recent efforts enhancing performances of 2D/2D summarized from critical factors visible light absorption, accelerating charge transfer/separation, introducing active sites. Notably, crucial roles surface defects, cocatalysts, modification performance optimization also discussed synergistic effect engineering heterogeneous interfaces. Finally, perspectives challenges proposed emphasize future opportunities expanding photocatalysis.

Язык: Английский

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Cost‐Effective High Entropy Core–Shell Fiber for Stable Oxygen Evolution Reaction at 2 A cm⁻²

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

Опубликована: Авг. 1, 2023

Abstract Exploring highly efficient oxygen evolution reaction (OER) electrocatalysts is important for industrial water electrolysis, especially under high current densities (>1 A cm −2 ). High‐entropy alloy (HEA) with surface OER activity and excellent electrical conductivity of the core an ideal route to improve catalytic activity. Herein, a combined theoretical experimental approach establish core–shell FeCoNiMoAl‐based HEA as promising electrocatalyst presented. Theoretical calculations structure analyses indicate crystalline–amorphous ( c–a ) heterostructure shell reduces electron transfer resistance generates more active sites, furthermore crystalline improves self‐supporting ability. electrodes demonstrate superior performance overpotential η 470 mV at 2 no apparent degradation even after 330 h continuous testing, notably, overall splitting stability than 120 2.06 V. The special achieves win–win strategy stability. These findings shed light on structural design present achieve electrolysis relevant energy conversion processes.

Язык: Английский

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A sulfur self‐doped multifunctional biochar catalyst for overall water splitting and a supercapacitor from Camellia japonica flowers

Carbon Energy, Год журнала: 2022, Номер 4(4), С. 491 - 505

Опубликована: Апрель 30, 2022

Abstract A versatile use of a sulfur self‐doped biochar derived from Camellia japonica (camellia) flowers is demonstrated as multifunctional catalyst for overall water splitting and supercapacitor. The native content in the camellia flower facilitates situ self‐doping sulfur, which highly activates camellia‐driven (SA‐Came) with enhanced electron‐transfer ability long‐term durability. For splitting, an SA‐Came‐based electrode stable shows reaction activities both hydrogen oxygen evolution reactions, overpotentials 154 362 mV at 10 mA cm −2 , respectively. supercapacitors, SA‐Came achieves specific capacitance 125.42 F g −1 2 high cyclic stability three‐electrode system 1 M KOH electrolyte. It energy density 34.54 Wh kg power 1600 W symmetric hybrid supercapacitor device wide working potential range 0–1.6 V.

Язык: Английский

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Hetero‐Anionic Structure Activated CoS Bonds Promote Oxygen Electrocatalytic Activity for High‐Efficiency Zinc–Air Batteries

Advanced Materials, Год журнала: 2023, Номер 35(36)

Опубликована: Май 18, 2023

Abstract The electronic structure of transition metal complexes can be modulated by replacing partial ion to obtain tuned intrinsic oxygen reduction reaction (ORR) or evolution (OER) electrocatalytic activity. However, the anion‐modulated ORR activity is still unsatisfactory, and construction hetero‐anionic remains challenging. Herein, an atomic doping strategy presented prepare CuCo 2 O 4‐x S x /NC‐2 (CCSO/NC‐2) as electrocatalysts, structrual characterization results favorably demonstrate substitution atoms for in CCSO/NC‐2, which shows excellent catalytic performance durability OER 0.1 m KOH. In addition, catalyst assembled Zinc–air battery with open circuit potential 1.43 V maintains after 300 h cyclic stability. Theoretical calculations differential charges illustrate that optimizes kinetics promotes electron redistribution. superior CCSO/NC‐2 catalysis mainly due its unique modulation main body. introduction CoO covalency constructs a fast transport channel, thus optimizing adsorption degree active site Co intermediates.

Язык: Английский

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