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Fe3O4@C core-shell microspheres have been synthesized by the carbonization of Fe3O4@resorcinol-formaldehyde which was obtained with an extended Stöber method. Without additional reducing agents, Pd nanoparticles were successfully immobilized in the shell of microspheres during the carbonization. The size of Pd nanoparticles could be controlled from 3 nm to 10 nm through adjusting the carbonization...
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