Articles with "urea oxidation" as a keyword



O‐2p Hybridization Enhanced Transformation of Active γ‐NiOOH by Chromium Doping for Efficient Urea Oxidation Reaction

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Published in 2024 at "Advanced Functional Materials"

DOI: 10.1002/adfm.202401265

Abstract: The electrooxidation of urea holds great potential for converting urea from wastewater into hydrogen, contributing to environmental protection and sustainable energy production. This necessitates the development of highly efficient and stable catalysts for the urea… read more here.

Keywords: energy; urea oxidation; active niooh; chromium ... See more keywords

Electron Shuttling of Iron‐Oxygen‐Cobalt Bridging in Cobalt Assembled Iron Oxyhydroxide Catalyst Boosts the Urea Oxidation Stability and Activity

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Published in 2025 at "Advanced Functional Materials"

DOI: 10.1002/adfm.202501170

Abstract: Iron (Fe)‐based materials hold great potential as urea oxidation reaction (UOR) catalysts, however, the deactivation of active Fe‐oxyhydroxide (FeOOH) species induced by its dissolution during catalytic process under high current densities is still significant challenge.… read more here.

Keywords: cobalt; iron; urea oxidation; oxygen cobalt ... See more keywords

Self‐Supported Asymmetric Ce─O─Ni Sites Reconstructed From Biscuit‐Like MOFs for Efficient Urea Oxidation and Zn‐Urea Battery Applications

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Published in 2025 at "Advanced Functional Materials"

DOI: 10.1002/adfm.202517562

Abstract: Designing asymmetric active sites with tailored electronic structures is crucial for improving the sluggish kinetics of the urea oxidation reaction (UOR) in energy conversion systems. Herein, a unique biscuit‐like Ce‐doped Ni‐MOF (Ce─Ni─BDC) directly grown on… read more here.

Keywords: self supported; biscuit like; urea oxidation; asymmetric sites ... See more keywords
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Carbon‐Oxyanion Atomically Steering Direct Urea Oxidation on NiOOH at Industrial Current Densities

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Published in 2025 at "Advanced Functional Materials"

DOI: 10.1002/adfm.202519865

Abstract: Developing cost‐effective electrocatalysts for the urea oxidation reaction (UOR) requires overcoming fundamental limitations of Ni‐based systems: sluggish Ni2+/Ni3+ redox kinetics, competing oxygen evolution, and structural instability. Herein, we demonstrate an organic acid‐assisted electrochemical reconstruction strategy… read more here.

Keywords: evolution; direct urea; oxyanion atomically; urea oxidation ... See more keywords

Formation and Stabilization of NiOOH by Introducing α‐FeOOH in LDH: Composite Electrocatalyst for Oxygen Evolution and Urea Oxidation Reactions

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Published in 2022 at "Advanced Materials"

DOI: 10.1002/adma.202209338

Abstract: NiOOH is considered as the most active intermediate during electrochemical oxidation reaction, however, it is hard to directly synthesize due to high oxidation energy. Herein, theoretical calculations predict that α‐FeOOH enables a decline in formation… read more here.

Keywords: oxidation; oxygen evolution; stabilization niooh; energy ... See more keywords

Ni‐Doped CuO Nanoarrays Activate Urea Adsorption and Stabilizes Reaction Intermediates to Achieve High‐Performance Urea Oxidation Catalysts

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Published in 2022 at "Advanced Science"

DOI: 10.1002/advs.202204800

Abstract: Urea oxidation reaction (UOR) with a low equilibrium potential offers a promising route to replace the oxygen evolution reaction for energy‐saving hydrogen generation. However, the overpotential of the UOR is still high due to the… read more here.

Keywords: adsorption; cuo nanoarrays; reaction; urea adsorption ... See more keywords

Electron Spin Polarization Facilitates the Urea Oxidation Reaction

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Published in 2025 at "ChemCatChem"

DOI: 10.1002/cctc.202501142

Abstract: This work reports on the role of electron spin in the urea oxidation reaction (UOR), which is important for wastewater treatment and for hydrogen production in energy applications, as it possesses a lower thermodynamic equilibrium… read more here.

Keywords: reaction; spin polarization; electron spin; urea oxidation ... See more keywords

Oxygen Vacancy-rich Ni/NiO@NC Nanosheets with Schottky Heterointerface for Efficient Urea Oxidation Reaction.

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Published in 2020 at "ChemSusChem"

DOI: 10.1002/cssc.202001185

Abstract: H2 production via electrocatalytic water splitting was greatly hindered by the sluggish oxygen evolution reaction (OER). Urea oxidation reaction (UOR) has drawn specific attention not only due to its lower theoretical voltage of 0.37 V… read more here.

Keywords: oxidation reaction; oxygen; nio nanosheets; urea oxidation ... See more keywords

Ni-Fe layered double hydroxide nanosheets supported on exfoliated graphite for efficient urea oxidation in direct urea fuel cells.

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Published in 2022 at "ChemSusChem"

DOI: 10.1002/cssc.202102614

Abstract: Urea-rich waste water can cause serious eutrophication problem to the water environment. On the other hand, urea is a potential fuel with high energy density, which can be effectively utilized by direct urea fuel cell.… read more here.

Keywords: urea fuel; exfoliated graphite; fuel; direct urea ... See more keywords

P-Induced Permeation of Nickel into WO3 Octahedra to Form a Synergetic Catalyst for Urea Oxidation.

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Published in 2022 at "ChemSusChem"

DOI: 10.1002/cssc.202201584

Abstract: Small molecules induction can achieve the oriented migration of metal elements, which affords functional materials with synergistic components. In this paper, P-WO3/NF catalyst was obtained by phosphating the nickel foam (NF) supported octahedral WO3 with… read more here.

Keywords: wo3; induced permeation; catalyst; urea oxidation ... See more keywords

Tuning of Oxygen Vacancies in Co3O4 Electrocatalyst for Effectiveness in Urea Oxidation and Water Splitting.

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Published in 2024 at "Small"

DOI: 10.1002/smll.202403744

Abstract: The development of an excellent multifunctional electrocatalyst that is based on non-precious metal is critical for improving the electrochemical processes of the hydrogen evolution reaction (HER), the oxygen evolution reaction (OER), and the urea oxidation… read more here.

Keywords: spectroscopy; oxygen; urea oxidation; co3o4 ... See more keywords