title: PdNi hollow nanoparticles for improved electrocatalytic oxygen reduction in alkaline environments.
abstract: 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.
authors.affiliation: ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Australian Institute of Innovative Materials, University of Wollongong , Wollongong, NSW 2500, Australia.
authors.forename: Meng
authors.initials: M
authors.lastname: Wang
authors.forename: Weimin
authors.initials: W
authors.lastname: Zhang
authors.forename: Jiazhao
authors.initials: J
authors.lastname: Wang
authors.forename: David
authors.initials: D
authors.lastname: Wexler
authors.forename: Simon D
authors.initials: SD
authors.lastname: Poynton
authors.forename: Robert C T
authors.initials: RC
authors.lastname: Slade
authors.forename: Huakun
authors.initials: H
authors.lastname: Liu
authors.forename: Bjorn
authors.initials: B
authors.lastname: Winther-Jensen
authors.forename: Robert
authors.initials: R
authors.lastname: Kerr
authors.forename: Dongqi
authors.initials: D
authors.lastname: Shi
authors.forename: Jun
authors.initials: J
authors.lastname: Chen