Breakthrough in Nanotechnology: PtNi Nanowires for Efficient Ammonia Electrooxidation

Strategic Insights -

Research conducted by the Wuhan University of Technology has led to the development of PtNi nanowires, which exhibit improved activity and durability in ammonia electrooxidation compared to traditional catalysts. The study, supported by the Guangdong Basic and Applied Basic Research Foundation and the Key R & D project of Hubei Province, highlights the potential of bespoke electrocatalyst engineering for direct ammonia fuel cells.

Key Takeaways:

  • The research focused on addressing the sluggish kinetic processes of anodes and the poisoning characteristics of NH3 intermediates in direct ammonia fuel cells, leading to the development of PtNi nanowires, nanorods, and nanoparticles with a Pt shell structure.
  • The unique thin Pt shell layer structure of PtNi nanowires enhances their activity compared to PtNi nanorods, nanoparticles, and commercial Pt/C, with a peak current density of 0.63 mA cm-2, 2.52 times higher than that of commercial Pt/C.
  • The incorporation of Ni into Pt can effectively bolster the electrochemical durability via electronic effects on the Pt surfaces.
  • The study's findings were supported by density functional theory calculations, which elucidated the critical role of the thin Pt shell structure in augmenting the adsorption of NH3 and diminishing the activation energy of the AOR process.
  • This research provides a conceptual framework for the design of efficacious AOR catalysts.

Statistics:

  • The peak current density of PtNi nanowires reached 0.63 mA cm-2.
  • The peak current density of commercial Pt/C was 0.24 mA cm-2, 2.52 times lower than that of PtNi nanowires.
  • The incorporation of Ni into Pt can effectively bolster the electrochemical durability, with a reported 0.34% decrease in current density in 10 hours.

Sources:

  • 1. News article by VerticalNews, "Study Results on Nanotechnology - Nanowires Have Been Published" (May 12, 2025)
  • 2. Research paper, "Effect of the Pt Surface Shell In Ptni Alloy Catalysts On Ammonia Electrooxidation" (2025; 522) published in Electrochimica Acta
  • 3. Research paper by Xufeng Tang, Sibin Zhu, et al., "Effect of the Pt Surface Shell In Ptni Alloy Catalysts On Ammonia Electrooxidation" (2025; 522)