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The Au@Pd nanocatalysts were prepared by seed-mediated growth method,forming thethree-dimensional FS nanoparticles,where tens of small Pd nanoparticles(3nm) aggregated on gold seeds(20nm).The nanocatalysts were characterized with UV-vis spectra,high-resolution transmission electronmicroscope(HRTEM),X-ray photoelectron spectroscopy(XPS).The FS Au@Pd nanoparticle was a goodcandidate for the catalytic efficiency of nanometallic surfaces because of its flower-shaped nature,which hasgreater adsorption capacity.