Single‐Atom Bi Alloyed Pd Metallene for Nitrate Electroreduction to Ammonia

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

Опубликована: Янв. 15, 2023

Abstract Electrochemical reduction of nitrate to ammonia (NO 3 RR) holds a great promise for attaining both NH electrosynthesis and wastewater purification. Herein, single‐atom Bi alloyed Pd metallene (Bi 1 Pd) is reported as highly effective NO RR catalyst, showing near 100% ‐Faradaic efficiency with the corresponding yield 33.8 mg h −1 cm −2 at −0.6 V versus RHE, surpassing those almost all ever catalysts. In‐depth theoretical operando spectroscopic investigations unveil that electronically couples its neighboring atoms synergistically activate − destabilize *NO on Pd, leading reduced energy barrier potential‐determining step (*NO→*NOH) enhanced protonation energetics ‐to‐NH pathway.

Язык: Английский

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High-efficiency electrocatalytic NO reduction to NH₃by nanoporous VN

Deleted Journal, Год журнала: 2022, Номер 1, С. e9120022 - e9120022

Опубликована: Июль 4, 2022

Electrocatalytic NO reduction reaction to generate NH₃ under ambient conditions offers an attractive alternative the energy-extensive Haber–Bosch route; however, challenge still lies in development of cost-effective and high-performance electrocatalysts. Herein, nanoporous VN film is first designed as a highly selective stable electrocatalyst for catalyzing with maximal Faradaic efficiency 85% peak yield rate 1.05 × 10^–7 mol·cm^–2·s^–1 (corresponding 5,140.8 μg·h^–1·mg_cat.^–1) at –0.6 V vs. reversible hydrogen electrode acid medium. Meanwhile, this catalyst maintains excellent activity negligible current density decays over 40 h. Moreover, proof-of-concept Zn–NO battery, it delivers high power 2.0 mW·cm^–2 large 0.22 1,077.1 μg·h^–1·mg_cat.^–1), both which are comparable best-reported results. Theoretical analyses confirm that surface favors activation hydrogenation by suppressing evolution. This work highlights electrochemical eco-friendly energy-efficient strategy produce NH₃.

Язык: Английский

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Recent advances on electrocatalytic CO2 reduction to resources: Target products, reaction pathways and typical catalysts

Chemical Engineering Journal, Год журнала: 2022, Номер 453, С. 139663 - 139663

Опубликована: Окт. 8, 2022

Язык: Английский

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Advances in the Electrocatalytic Hydrogen Evolution Reaction by Metal Nanoclusters‐based Materials

Small, Год журнала: 2022, Номер 18(52)

Опубликована: Окт. 26, 2022

Abstract With the development of renewable energy systems, clean hydrogen is burgeoning as an optimal alternative to fossil fuels, in which its application promising retarding global and environmental crisis. The evolution reaction (HER), capable producing high‐purity rapidly electrocatalytic water splitting, has received much attention. Abundant research about HER been done, focusing on advanced electrocatalyst design with high efficiency robust stability. As potential catalysts, metal nanoclusters (MNCs) have studied extensively. They are composed several a hundred atoms, sizes being comparable Fermi wavelength electrons, that is, < 2.0 nm. Different from atoms/nanoparticles, they exhibit unique catalytic properties due their quantum size effect low‐coordination environment. In this review, activity‐enhancing approaches MNCs applied electrocatalysis mainly summarized. Furthermore, recent progress classified different stabilization strategies, freestanding MNCs, organic, carbon supports, introduced. Finally, current challenges deficiencies these for prospected.

Язык: Английский

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Atomically Fe-doped MoS2−x with Fe-Mo dual sites for efficient electrocatalytic NO reduction to NH3

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 324, С. 122241 - 122241

Опубликована: Ноя. 29, 2022

Язык: Английский

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Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries

Small Structures, Год журнала: 2022, Номер 3(12)

Опубликована: Авг. 19, 2022

Rechargeable aqueous Zn–CO 2 batteries show great promise in meeting severe environmental problems and energy crises due to their combination of CO utilization output, as well advantages high theoretical density, abundant raw materials, safety. Developing high‐efficiency stable reduction reaction (CO RR) electrocatalysts is critical importance for the promotion this technology. Atomically dispersed metal‐based catalysts (ADMCs), with extremely atom‐utilization efficiency, tunable coordination environments, superior intrinsic catalytic activity, are emerging promising candidates batteries. Herein, some recent developments atomically summarized, including transition metal non‐transition sites. Moreover, various synthetic strategies, characterization methods, relationship between active site structures RR activity/Zn–CO battery performance introduced. Finally, challenges perspectives also proposed future development ADMCs

Язык: Английский

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Active-site and interface engineering of cathode materials for aqueous Zn—gas batteries

Nano Research, Год журнала: 2022, Номер 16(2), С. 2325 - 2346

Опубликована: Сен. 27, 2022

Язык: Английский

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Selenium-vacancy-rich WSe2 for nitrate electroreduction to ammonia

Journal of Colloid and Interface Science, Год журнала: 2022, Номер 629, С. 563 - 570

Опубликована: Сен. 6, 2022

Язык: Английский

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Recent advances in non-noble metal-based bifunctional electrocatalysts for overall seawater splitting

Journal of Alloys and Compounds, Год журнала: 2022, Номер 922, С. 166113 - 166113

Опубликована: Июль 6, 2022

Since seawater is one of the most abundant resources on earth, electrolysis becoming increasingly attractive for clean energy/hydrogen production. Although significant progress has been made recently, it still challenging to obtain bifunctional electrocatalysts with high catalytic activity and durability suitable because scarcity precious metals inadequate state-of-the-art materials overall reaction. The development high-performance crucial commercialization in this review, mechanism challenges are introduced. Optimization strategies different types non-noble-metal-based including structural regulation, interface doping situ assembly, alloying, amorphization summarized elucidate relationship among composition, structure, properties. Finally, challenge prospective future catalysts discussed. This paper aims at providing guidance insights into rational design highly efficient practical splitting.

Язык: Английский

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Sustainable conversion of alkaline nitrate to ammonia at activities greater than 2 A cm−2

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Фев. 10, 2024

Abstract Nitrate (NO 3 ‒ ) pollution poses significant threats to water quality and global nitrogen cycles. Alkaline electrocatalytic NO reduction reaction RR) emerges as an attractive route for enabling removal sustainable ammonia (NH synthesis. However, it suffers from insufficient proton (H + supply in high pH conditions, restricting -to-NH activity. Herein, we propose a halogen-mediated H feeding strategy enhance the alkaline RR performance. Our platform achieves near-100% NH Faradaic efficiency (pH = 14) with current density of 2 A cm –2 enables over 99% – conversion efficiency. We also convert high-purity 4 Cl near-unity efficiency, suggesting practical approach valorizing pollutants into valuable products. Theoretical simulations situ experiments reveal that Cl-coordination endows shifted d -band center Pd atoms construct local -abundant environments, through arousing dangling O-H dissociation fast *H desorption, *NO intermediate hydrogenation finally effective conversion.

Язык: Английский

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