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    Green synthesized CuxO@Cu nanocomposites on a Cu mesh with dual catalytic functions for dye degradation and hydrogen evaluation

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    Type
    Article
    Authors
    Alhebshi, Nuha
    Huang, Hao
    Ghandour, Rokiya
    Alghamdi, Nada K.
    Alharbi, Ohoud
    Aljurban, Shahad
    He, Jr-Hau cc
    Al-Jawhari, Hala
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    KAUST Catalysis Center (KCC)
    KAUST Solar Center (KSC)
    Nano Energy Lab
    Physical Science and Engineering (PSE) Division
    Date
    2020-07-30
    Online Publication Date
    2020-07-30
    Print Publication Date
    2020-12
    Embargo End Date
    2022-08-10
    Submitted Date
    2020-03-25
    Permanent link to this record
    http://hdl.handle.net/10754/664614
    
    Metadata
    Show full item record
    Abstract
    Here we introduce an ecological facile method to grow heterogeneous copper oxide (CuxO) nanocomposites on a Cu mesh using spinach leaf extract. After annealing at different temperatures, morphological and structural characterizations revealed that samples annealed at 300 °C comprise the highest Cu+/Cu2+ ratio and reveal the most porous structure. Such samples exhibited dual catalytic functions as both photocatalysts for dye degradation, and electrocatalysts for hydrogen evolution. Their photocatalytic activity for degradation of methylene blue (MB) was investigated under sunlight irradiation of 7 mW/cm2. A complete degradation, with an average kinetic rate of 63.2 m min−1, was achieved after 60 min. Moreover, the samples revealed a good electrochemical catalytic property for hydrogen evolution reaction (HER) in acidic medium. They exhibited HER onset at 357 mV with a small charge transfer resistance of 8.2 Ω. Such promising outcomes could open a new path for mass-production applications in water-energy fields.
    Citation
    Alhebshi, N., Huang, H., Ghandour, R., Alghamdi, N. K., Alharbi, O., Aljurban, S., … Al-Jawhari, H. (2020). Green synthesized CuxO@Cu nanocomposites on a Cu mesh with dual catalytic functions for dye degradation and hydrogen evaluation. Journal of Alloys and Compounds, 848, 156284. doi:10.1016/j.jallcom.2020.156284
    Sponsors
    This work was supported by the Science Research and Innovation Unit at KAU and Mawakeb Alajer. The XPS and SEM characterizations were conducted at the Nanotechnology Center at KAU.
    Publisher
    Elsevier BV
    Journal
    Journal of Alloys and Compounds
    DOI
    10.1016/j.jallcom.2020.156284
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0925838820326487
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jallcom.2020.156284
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Electrical Engineering Program; KAUST Catalysis Center (KCC); KAUST Solar Center (KSC); Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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