Abstract
AbstractBinary AuPd nanoparticles were prepared by sonochemical reduction of solutions containing Au3+, Pd2+ ions and surfactant (SDS: sodium dodecyl sulfate and PEG‐MS: polyethylene glycol monostearate). When using SDS as an additive, AuPd nanoparticles became a core‐shell structure of Au core and Pd shell. AuPd nanoparticle with core‐shell structure has catalytic activity superior to alloyed particle or Pd nanoparticles. In order to study the electronic states of AuPd nanoparticles, positron annihilation Doppler broadening measurements by using slow positron beam (energy range of 0.1 to 10 keV) have been performed for AuPd nanoparticles. The size and shape of the nanoparticles are also examined by using transmission electron microscope (TEM). The differences of Doppler broadening parameters between core‐shell, alloyed AuPd, pure Au and Pd particles were found. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Published Version
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