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    Template-free synthesis of M/g-C3N4 (M = Cu, Mn, and Fe) porous one-dimensional nanostructures for green hydrogen production

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    1-s2.0-S1572665723002862-main.pdf (4.125Mb)
    Date
    2023-06-01
    Author
    Ahmed, Abdelgawad
    Salah, Belal
    Lu, Qingqing
    Abdullah, Aboubakr M.
    Chitt, Mira
    Ghanem, Alaa
    Al-Hajri, Rashid S.
    Eid, Kamel
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    Abstract
    Herein, we synthesized porous one-dimensional graphitic carbon nitride (g-C3N4) doped atomically with metal atoms (M/g-C3N4) (M = Cu, Mn, and Fe) for the electrochemical and photo-electrochemical hydrogen evolution reaction (HER). This is driven by the direct acidification of an aqueous solution of metal precursors and melamine followed by pyrolysis at 550 °C under N2. The as-obtained M/g-C3N4 had well-defined pore sizes (5–10 nm), nanofibers (90 ± 5 nm in width and 5 ± 1 μm in length) morphology, high surface area, and M atomic contents (1.7 ± 0.2 wt.%). The HER performance is in the order of Cu/g-C3N4 > Fe/g-C3N4 > Mn/g-C3N4 in terms of the overpotential, onset potential, H2 production rate, and mass/specific activity. Notably, Cu/g-C3N4 achieved turnover frequency (TOF) close to that of commercial 10 wt.% Pt/C, but higher mass/specific activity and great H2 production rate of (222.15 μmol· g−1·h−1). This work open the doorway for the utilization of g-C3N4 doped metal-atoms at low content in electrocatalytic and photocatalytic HER.
    URI
    https://www.sciencedirect.com/science/article/pii/S1572665723002862
    DOI/handle
    http://dx.doi.org/10.1016/j.jelechem.2023.117426
    http://hdl.handle.net/10576/65937
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    • GPC Research [‎504‎ items ]

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