Macroporous copolymer synthesized by suspension copolymerization was amino-functionalized. Pd(II) ions were immobilized onto copolymer from chloride and nitrate solutions. Pd(II) ions were deposited on the macroporous support as discrete bright aggregates. The different shape of Pd nanoparticles gave different voltammograms. 4-CP oxidation paths were different for different shape of palladium nanoparticles.