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      Fabrication of NiCu interconnected porous nanostructures for highly selective methanol oxidation coupled with hydrogen evolution reaction

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      Author(s)
      Arshad, F.
      Tahir, A.
      Haq, T.
      Duran, Hatice
      Hussain, I.
      Sher, F.
      Date
      2022-01-15
      Source Title
      International Journal of Hydrogen Energy
      Print ISSN
      0360-3199
      Electronic ISSN
      1879-3487
      Publisher
      Elsevier
      Volume
      47
      Issue
      85
      Pages
      36118 - 36128
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      Electrocatalytic water electrolysis is the most promising clean and efficient process for pure and clean generation of hydrogen. However, water oxidation reaction requires a large overpotential owing to its slow kinetics, causing a lower efficiency of hydrogen production and high energy consumption. Herein, we report the bimetallic NiCu interconnected porous nanostructures on copper foil (NiCu@Cu) prepared by hydrogen bubbles templating electrodeposition technique for methanol oxidation reaction (MOR), which replaces the kinetically sluggish water oxidation reaction and enhances the hydrogen production with lower energy input. With their high macroporosity, interconnected growth on copper foil with excellent conductivity and easy flow of electrolyte on electrode interface, and stabilization of active sites due to bimetallic synergistic effects, the NiCu@Cu electrocatalysts exhibit outstanding activities for HER and MOR. The NiCu@Cu requiring just 1.32 V anodic potential vs RHE at 10 mA cm−2 for MOR which is significantly lower than that for water oxidation reaction. Moreover, the electrolyzer using NiCu@Cu/NiCu@Cu for anodic MOR and cathodic H2 production only needs a low input voltage of 1.45 V to deliver a current density of 10 mA cm−2 with impressive durability.
      Keywords
      Bubble templating electrodeposition
      Energy-saving hydrogen production
      Methanol-assisted hydrogen production
      NiCu porous Interconnected network
      Selective methanol oxidation reaction
      Permalink
      http://hdl.handle.net/11693/111689
      Published Version (Please cite this version)
      https://doi.org/10.1016/j.ijhydene.2022.08.187
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