Bimetallic Pt@Ir zigzag nanocomplexes were successfully synthesized with a uniform morphology via the simple reduction of Ir(acac)3 on the surface of Pt nanorods. The novel Pt@Ir nanocomplexes exhibited good catalytic activity in hydrogenation reactions under mild conditions, such as the hydrogenation of nitroaromatic compounds. The highest yield of the obtained product achieved was ∼99.9% using H2 as the sole reductant.