Self‐Encapsulation of High‐Entropy Alloy Nanoparticles inside Carbonized Wood for Highly Durable Electrocatalysis

Advanced Materials, Год журнала: 2024, Номер 36(28)

Опубликована: Апрель 26, 2024

High-entropy alloy nanoparticles (HEAs) show great potential in emerging electrocatalysis due to their combination and optimization of multiple elements. However, synthesized HEAs often exhibit a weak interface with the conductive substrate, hindering applications long-term catalysis energy conversion. Herein, highly active durable electrocatalyst composed quinary (PtNiCoFeCu) encapsulated inside activated carbonized wood (ACW) is reported. The self-encapsulation achieved during Joule heating synthesis (2060 K, 2 s) where naturally nucleate at defect sites. In meantime, catalyze deposition mobile carbon atoms form protective few-layer shell rapid quenching process, thus remarkably strengthening stability between ACW. As result, HEAs@ACW shows not only favorable activity an overpotential 7 mV 10 mA cm

Язык: Английский

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Dual active site and metal–substrate interface effect endow platinum–ruthenium/molybdenum carbide efficient pH-universal hydrogen evolution reaction

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 685, С. 371 - 381

Опубликована: Янв. 21, 2025

Язык: Английский

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In situ sacrificial CoMoO4 template to derive molybdenum-doped CoOOH nanosheets for alkaline hydrogen evolution reaction

Applied Catalysis B Environment and Energy, Год журнала: 2025, Номер unknown, С. 125110 - 125110

Опубликована: Янв. 1, 2025

Язык: Английский

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Hydrothermal synthesis and characterization of FeSbO2F2 nanoparticle and its applications towards hydrogen evolution reaction, dye management and bacterial disinfection studies

Inorganic Chemistry Communications, Год журнала: 2025, Номер unknown, С. 114073 - 114073

Опубликована: Фев. 1, 2025

Язык: Английский

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Electron delocalization-modulated hydroxyl binding for enhanced hydrogen evolution reaction activity

Science Bulletin, Год журнала: 2025, Номер unknown

Опубликована: Фев. 1, 2025

Язык: Английский

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2D Metastable‐Phase Hafnium Oxide Triggers Hydrogen Spillover for Boosting Hydrogen Production

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

Abstract Hydrogen (H) manipulation plays a significantly important role in many applications, which the occurrence of hydrogen spillover generally shows substrate‐dependent behavior. It therefore remains an open question about how to trigger on substrates that are forbidden. Here new metastable‐phase 2D edge‐sharing oxide: six‐hexagonal phase‐hafnium oxide (Hex‐HfO 2 , space group: P6 3 mc (186)) with coordination number six is demonstrated, serves as ideal platform for activating efficient after loading Ru nanoclusters (Ru/Hex‐HfO ). For stark comparison, strongly forbidden when using stable monoclinic phase HfO (M‐HfO P2 1 /c (14), number: seven) substrate. When applied acidic evolution reaction (HER), Ru/Hex‐HfO exhibits low overpotential 8 mV at 10 mA cm −2 and high utilization activity 14.37 A mg −1 30 mV. Detailed mechanism reveals positive H adsorption free energy Hex‐HfO indicating more likely . Furthermore, strong interaction between optimizes desorption intermediate, thus facilitating surface spillover. The discovery provides guidance developing advanced catalysis.

Язык: Английский

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Direct visualisation of metal–defect cooperative catalysis in Ru-doped defective MOF-808

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(30), С. 19018 - 19028

Опубликована: Янв. 1, 2024

Metal–defect cooperative catalysis in Ru-doped defective MOF-808 is directly visualised via combined XAS, XPDF, XRD, and IR analysis.

Язык: Английский

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A pillar-layered Ni₂P–Ni₅P₄–CoP array derived from a metal–organic framework as a bifunctional catalyst for efficient overall water splitting

Dalton Transactions, Год журнала: 2024, Номер 53(20), С. 8732 - 8739

Опубликована: Янв. 1, 2024

A pillar-layered Ni 2 P–Ni 5 P 4 –CoP–C array on nickel foam derived from a Ni–Co metal–organic framework exhibits high activity towards both the HER and OER in alkaline media as bifunctional catalyst.

Язык: Английский

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Electronic Modulation of RuCo Catalysts on TiO₂ Nanotubes Promoting Durable Acidic Overall Water Splitting

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 23, 2024

Abstract The development of efficient and durable bifunctional electrocatalysts is essential for hydrogen production from acidic water splitting. Herein, a TiO 2 nanotube‐loaded Co‐doped Ru nanoparticle catalyst (RuCo/TiO NTs) reported that exhibits excellent activity stability toward oxygen evolution reaction (OER) (HER). Ru─O─Ti bonding enhanced by Co doping, the metal carrier interaction between nanoparticles NTs enhanced, which effectively stabilizes species during OER initiates spillover accelerating HER kinetics. As result, RuCo/TiO requires only 156 mV overpotential 17 to achieve current density 10 mA cm −2 with more than 500 h in conditions. More importantly, benefiting activities, proton exchange membrane electrolyte assembled has robust (1000 h). This work opens new avenue energy conversion devices.

Язык: Английский

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LDHs and their Derivatives for Electrochemical Energy Storage and Conversion Systems: Design, Insights and Applications

ChemElectroChem, Год журнала: 2024, Номер 11(13)

Опубликована: Июнь 11, 2024

Abstract Electrochemical energy storage and conversion systems (EESCSs), including batteries, supercapacitors, fuel cells, water electrolysis technologies, enabling the direct between chemical electrical energies. They are key to flexible utilization of renewable play an important role in future technologies. The physical properties electrode materials significantly influence performance EESCSs, necessitating development with both high cost‐effectiveness superior electrochemical catalytic capabilities. Layered double hydroxides (LDHs), due their unique as surface area, evenly distributed active sites, tunable compositions, makes themselves derivatives have become focal points EESCSs. This review summarizes recent advances LDH derivates for diverse EESCSs applications, aims elucidate modification strategies provide valuable insights exploring LDH‐derived various devices, offering interdisciplinary perspectives rational design LDH‐based materials.

Язык: Английский

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