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Phase Stability of High Entropy (Mg,Ni,Co,Cu,Zn)O from Temperature-Resolved Synchrotron Diffraction: Tetragonal Distortion and Guggenite Phase.
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December 2024
Chemistry Department, University of Pavia, via Taramelli 16, Pavia, 27100, Italy.
The temperature-resolved structure evolution of quinary and quaternary equimolar oxides containing Mg, Ni, Zn, Co, and Cu is investigated by in situ synchrotron diffraction. Important structural modifications occur already at mild temperatures and depend on the elements involved. All quaternary compounds with χ(Cu) = 0.
View Article and Find Full Text PDFExtraordinary synergy on 3D hierarchical porous Co-Cu nanocomposite for catalytic elimination of VOCs at low temperature and high space velocity.
J Environ Sci (China)
May 2025
School of Chemical Engineering, Sichuan University, Chengdu 610065, China. Electronic address:
It is still a challenge to develop hierarchically nanostructured catalysts with simple approaches to enhance the low-temperature catalytic activity. Herein, a set of mesoporous Co-Cu binary metal oxides with different morphologies were successfully prepared via a facile ammonium bicarbonate precipitation method without any templates or surfactants, which were further applied for catalytic removal of carcinogenic toluene. Among the catalysts with different ratios, the CoCu composite oxide presented the best performance, where the temperature required for 90% conversion of toluene was only 237°C at the high weight hour space velocity (WHSV) of 240,000 mL/(g·hr).
View Article and Find Full Text PDFTurn-on fluorescence detection of carbon monoxide in plant tissues based on Cu modulated polydihydroxyphenylalanine nanosensors.
Anal Methods
September 2024
Research Center for Natural Medicine and Chemical Metrology, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
As an important signaling molecule, carbon monoxide (CO) plays an important role in plant growth and development including affecting stomatal movement, stress response and root development. Thus, it is necessary to develop fluorescent probes that can be used to detect CO in live plant tissues and further enable a deep-understanding of its biological function, mechanism and metabolism. In this paper, a novel and sensitive fluorescent probe based on Cu modulated polydihydroxyphenylalanine nanoparticles (PDOAs) has been developed for the detection of CO.
View Article and Find Full Text PDFDevelopment of PHBV electrospun fibers containing a borate bioactive glass doped with Co, Cu, and Zn for wound dressings.
J Biomed Mater Res B Appl Biomater
August 2024
Institute of Science and Technology, Bioceramics Laboratory, Federal University of São Paulo, São José dos Campos, São Paulo, Brazil.
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) nanofibers embedded with borate glasses of 45B5 composition doped with Co, Cu, and Zn (46.1 B₂O₃26.9-X CaO24.
View Article and Find Full Text PDFSelf-Reconstructed Metal-Organic Framework-Based Hybrid Electrocatalysts for Efficient Oxygen Evolution.
Nanomaterials (Basel)
July 2024
Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, School of Materials Science and Engineering, Peking University, No. 5 Yiheyuan Road, Haidian District, Beijing 100871, China.
Refining synthesis strategies for metal-organic framework (MOF)-based catalysts to improve their performance and stability in an oxygen evolution reaction (OER) is a big challenge. In this study, a series of nanostructured electrocatalysts were synthesized through a solvothermal method by growing MOFs and metal-triazolates (METs) on nickel foam (NF) substrates (named MET-M/NF, M = Fe, Co, Cu), and these electrocatalysts could be used directly as OER self-supporting electrodes. Among these electrocatalysts, MET-Fe/NF exhibited the best OER performance, requiring only an overpotential of 122 mV at a current density of 10 mA cm and showing remarkable stability over 15 h.
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