ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Australian Institute of Innovative Materials, University of Wollongong , Wollongong, NSW 2500, Australia.
ACS Appl Mater Interfaces. 2013 Dec 11;5(23):12708-15. doi: 10.1021/am404090n. Epub 2013 Nov 19.
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.
钯镍（PdNi）空心纳米粒子通过一种改良的电置换方法合成，在水介质中使用镍纳米粒子作为牺牲模板。X 射线衍射和透射电子显微镜表明，所合成的纳米粒子是合金纳米结构，具有空心内部，平均粒径为 30nm，壳层厚度为 5nm。与市售的 Pt/C 或 Pd/C 催化剂相比，合成的 PdNi/C 对氧还原反应具有优异的电催化性能，使其成为碱性阴离子交换膜燃料电池和基于碱的空气电池的有前途的电催化剂。该电催化剂最终在 H2/O2 碱性阴离子交换膜燃料电池中进行了测试；结果表明，与最先进的市售 Pt/C 相比，这种电催化剂作为更高效的催化剂，可以在实际燃料电池应用中工作。
