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Hierarchical Ni-Mo-P nanoarrays toward efficient urea oxidation reaction.

Jing LiFeng HuJinpei HeiGuoan LiuHui WeiNannan WangHe-He Wei
Published in: Dalton transactions (Cambridge, England : 2003) (2022)
The urea oxidation reaction (UOR), which possesses a low theoretical potential and superior kinetics, is an attractive substitute for the anodic oxygen evolution reaction (OER) in overall water splitting; however, the implementation of hydrogen production in overall urea splitting is impeded by the deficiency of highly efficient, durable and cost-effective catalysts. Herein, we fabricated an Ni 2 P-MoP 2 heterostructure with a hierarchical structure grown on carbon paper (Ni-Mo-P/CP), which exhibited robust activity and outstanding durability for the electrocatalytic oxidation of urea. The Ni-Mo-P/CP catalyst possessed an ultralow potential of 1.39 V to obtain the current density of 100 mA cm -2 , small Tafel slope (27 mV dec -1 ) and long-term durability with almost no decay within 15 h. The experimental characterization revealed that the optimized electronic structure and the synergistic effect of abundant exposed active sites in the Ni-Mo-P/CP catalyst contribute to the efficient UOR catalytic activity. This work enriches the candidate catalysts for the UOR and promotes the industrial development of hydrogen production.
Keyphrases
  • highly efficient
  • metal organic framework
  • transition metal
  • visible light
  • electron transfer
  • hydrogen peroxide
  • primary care
  • human health
  • heavy metals
  • risk assessment
  • climate change
  • gold nanoparticles