PdNi hollow nanoparticles for improved electrocatalytic oxygen reduction in alkaline environments.

نویسندگان

  • Meng Wang
  • Weimin Zhang
  • Jiazhao Wang
  • David Wexler
  • Simon D Poynton
  • Robert C T Slade
  • Huakun Liu
  • Bjorn Winther-Jensen
  • Robert Kerr
  • Dongqi Shi
  • Jun Chen
چکیده

Palladium-nickel (PdNi) hollow nanoparticles were synthesized via a modified galvanic replacement method using Ni nanoparticles as sacrificial templates in an aqueous medium. X-ray diffraction and transmission electron microscopy show that the as-synthesized nanoparticles are alloyed nanostructures and have hollow interiors with an average particle size of 30 nm and shell thickness of 5 nm. Compared with the commercially available Pt/C or Pd/C catalysts, the synthesized PdNi/C has superior electrocatalytic performance towards the oxygen reduction reaction, which makes it a promising electrocatalyst for alkaline anion exchange membrane fuel cells and alkali-based air-batteries. The electrocatalyst is finally examined in a H2/O2 alkaline anion exchange membrane fuel cell; the results show that such electrocatalysts could work in a real fuel cell application as a more efficient catalyst than state-of-the-art commercially available Pt/C.

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عنوان ژورنال:
  • ACS applied materials & interfaces

دوره 5 23  شماره 

صفحات  -

تاریخ انتشار 2013