Synthetic Tuning of the Catalytic Properties of Au-Fe3O4 Nanoparticles


  • This work was supported by NSF/DMR 0606264 (S.S.), a GAANN fellowship (Y.L.), and CICYT/FIS-2008-06249 (M.A.G.). We thank Prof. H. Srikanth and Dr. M. H. Phan of the University of South Florida for helpful discussions.


original image

Dumbbell-like Au-Fe3O4nanoparticles and their single-component counterparts, Au and Fe3O4, were compared regarding their H2O2 reduction capability. The Au-Fe3O4 nanoparticles are catalytically more active, which is attributed to polarization effects from Au to Fe3O4. This activity can be further tuned by the size of the nanoparticles.