Activating Fe activity and improving Ni activity via C3N4 substrate in alkaline oxygen evolution catalyzed by Ni-Fe phosphide

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 342, P. 123391 - 123391

Published: Oct. 11, 2023

Language: Английский

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Out-of-plane coordination of iridium single atoms with organic molecules and cobalt–iron hydroxides to boost oxygen evolution reaction

Nature Nanotechnology, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 21, 2024

Abstract Advancements in single-atom-based catalysts are crucial for enhancing oxygen evolution reaction (OER) performance while reducing precious metal usage. A comprehensive understanding of underlying mechanisms will expedite this progress further. Here we report Ir single atoms coordinated out-of-plane with dimethylimidazole (MI) on CoFe hydroxide (Ir 1 /(Co,Fe)-OH/MI). This /(Co,Fe)-OH/MI catalyst, which was prepared using a simple immersion method, delivers ultralow overpotentials 179 mV at current density 10 mA cm −2 and 257 600 as well an ultra-small Tafel slope 24 dec −1 . Furthermore, has total mass activity exceeding that commercial IrO 2 by factor 58.4. Ab initio simulations indicate the coordination MI leads to electron redistribution around sites. causes positive shift d -band centre adjacent Co sites, facilitating optimal energy pathway OER.

Language: Английский

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Strongly Coupled Heterostructured CoP/MoO₂ as an Advanced Electrocatalyst for Urea-Assisted Water Electrolysis

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(5), P. 2803 - 2813

Published: Jan. 20, 2024

Developing low-cost electrocatalysts with excellent activity and durability in urea-assisted water splitting is urgently needed order to achieve sustainable hydrogen production. Herein, we situ synthesized a robust coupled heterostructured electrocatalyst (CoP/MoO2) on nickel foam (NF) substrate explored its electrocatalytic performances the evolution reaction (HER), oxygen (OER), urea oxidation (UOR). The overpotential of CoP/MoO2/NF found be only 11 mV at 10 mA cm–2 during HER process, which significantly lower than that commercial Pt/C. Meanwhile, UOR catalytic performance indicates fast kinetics, along considerable low driving potential (1.26 V) compared OER (1.51 V). In ex techniques demonstrate these properties are mainly ascribed effective synergistic effect strong electronic interactions between single-component CoP MoO2, can tune states Co Mo, expose more active sites, enhance intrinsic activity, accelerate charge transfer. Moreover, when used electrochemical overall electrolysis, reach current density 1.46 1.32 V. This outperforms Pt/C||RuO2 numerous nonprecious metal maintains stable long-term electrolytic operation for 84 h. work provides promising pathway development efficient catalysts electrolysis

Language: Английский

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Heterostructure Cu3P−Ni2P/CP catalyst assembled membrane electrode for high-efficiency electrocatalytic nitrate to ammonia

Nano Research, Journal Year: 2024, Volume and Issue: 17(6), P. 4872 - 4881

Published: Feb. 8, 2024

Language: Английский

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Co/Co₃O₄ Heterojunctions Encased in Porous N-Doped Carbon Nanocapsules for High-Performance Cathode of Rechargeable Zinc–Air Batteries

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(8), P. 3702 - 3711

Published: Feb. 9, 2024

A long-term goal of rechargeable zinc-air batteries (ZABs) has always been to design bifunctional electrocatalysts that are robust, effective, and affordable for the oxygen reduction reaction (ORR) evolution (OER). It become a feasible method construct metal/metal oxide interfaces achieve superior electrocatalytic performance ORR OER by enhanced charge transfer. In this study, Co/Co

Language: Английский

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Fe-Doped Ni₂P/NiSe₂ Composite Catalysts for Urea Oxidation Reaction (UOR) for Energy-Saving Hydrogen Production by UOR-Assisted Water Splitting

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(19), P. 8925 - 8937

Published: April 29, 2024

The development of efficient urea oxidation reaction (UOR) catalysts helps UOR replace the oxygen evolution (OER) in hydrogen production from water electrolysis. Here, we prepared Fe-doped Ni2P/NiSe2 composite catalyst (Fe–Ni2P/NiSe2-12) by using phosphating-selenizating and acid etching to increase intrinsic activity active areas. Spectral characterization theoretical calculations demonstrated that electrons flowed through Ni–P–Fe–interface–Ni–Se–Fe, thus conferring high Fe–Ni2P/NiSe2-12, which only needed 1.39 V vs RHE produce current density 100 mA cm–2. Remarkably, this potential was 164 mV lower than required for OER under same conditions. Furthermore, EIS driven Fe–Ni2P/NiSe2-12 exhibited faster interfacial reactions, charge transfer, response compared OER. Consequently, can effectively prevent competition with NSOR, making it suitable UOR-assisted Notably, when electrolysis is operated at a 40 cm–2, system achieve decrease 140 traditional This study presents novel strategy splitting energy-saving production.

Language: Английский

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Scaling Up Stability: Navigating from Lab Insights to Robust Oxygen Evolution Electrocatalysts for Industrial Water Electrolysis

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 29, 2024

Abstract In the pursuit of sustainable hydrogen production via water electrolysis, paramount importance electrocatalyst stability emerges as a defining factor for long‐term industrial viability. A thorough understanding and enhancement not only ensure extended catalyst lifetimes but also pave way consistent efficient generation. This review focuses on pivotal role in determining practical viability oxygen evolution electrocatalysts (OECs) large‐scale applications electrolysis production. The paper explores over initial activity, citing examples hypothetical scenarios. First, figures merits evaluation are explained along with available benchmarking protocols evaluation. Further, text delves into various strategies that can enhance which include self‐healing/regeneration pathway, reaction (OER) mechanism optimization to achieve highly stable OER stabilization active metals atoms within inhibit dissolution forward application. interplay stability, cost is suit application electrocatalyst. Lastly, it outlines challenges, prospects, future directions, presenting guide advancing OECs generation landscape.

Language: Английский

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Fabrication of CoFe-LDH nanosheets@CoP nanowires hierarchical heterostructure with enhanced bifunctional electrocatalytic activity for alkaline water splitting

Chemical Engineering Science, Journal Year: 2024, Volume and Issue: 294, P. 120100 - 120100

Published: April 4, 2024

Language: Английский

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Advancing overall water splitting via phase-engineered amorphous/crystalline interface: A novel strategy to accelerate proton-coupled electron transfer

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 667, P. 237 - 248

Published: April 15, 2024

Language: Английский

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Coupling Nano and Atomic Electric Field Confinement for Robust Alkaline Oxygen Evolution

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(28)

Published: April 29, 2024

Abstract The alkaline oxygen evolution reaction (OER) is a promising avenue for producing clean fuels and storing intermittent energy. However, challenges such as excessive OH − consumption strong adsorption of oxygen‐containing intermediates hinder the development OER. In this study, we propose cooperative strategy by leveraging both nano‐scale atomically local electric fields OER, demonstrated through synthesis Mn single atom doped CoP nanoneedles (Mn SA‐CoP NNs). Finite element method simulations density functional theory calculations predict that field enriches around catalyst surface, while improves *O desorption. Experimental validation using in situ attenuated total reflection infrared Raman spectroscopy confirms effectiveness fields. NNs exhibit an ultra‐low overpotential 189 mV at 10 mA cm −2 stable operation over 100 hours ~100 during This innovative provides new insights enhancing performance energy conversion reactions.

Language: Английский

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