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Wang, M., Zhang, W., Wang, J., Wexler, D., Poynton, S. D., Slade, R. C.T., Liu, H., Winther-Jensen, B., Kerr, R., Shi, D. & Chen, J. (2013). PdNi hollow nanoparticles for improved electrocatalytic oxygen reduction in alkaline environments. ACS Applied Materials and Interfaces, 5 (23), 12708-12715.


Palladium-Nickel (Pd-Ni) 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 an 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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