Scavenging DPPH radicals catalyzed by binary noble metal–dendrimer nanocomposites

Catalytic activity of gold–platinum, gold–palladium, and platinum–palladium dendrimer nanocomposites for scavenging 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals was investigated. The gold–platinum and gold–palladium dendrimer nanocomposites were prepared via simultaneous reduction by sodium borohydride in the presence of poly(amidoamine) (PAMAM) dendrimers with amine or carboxyl terminal groups. The particles were not mixtures of monometallic particles but alloyed bimetallic particles. Bimetallic particles exhibited higher catalytic activity than monometallic ones.

DPPH scavenging catalyze by bimetallic nanoparticles stabilized by PAMAM dendrimer were investigated. Bimetallic nanoparticles have higher catalytic activity than monometallic ones.Figure optionsDownload as PowerPoint slide