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Synthesis of palladium clusters by reduction of K2PdCl4 with ethylene glycol

Palladium clusters have been prepared by chemical reduction of [PdCl4]2- ions with ethylene glycol in presence of polyvinylpyrrolidone as protective agent. The palladium clusters obtained by reduction at 90°C for 2 hours had a diameter of ca. 2.8 nm and were quite monodispersed. Nano-sized palladium can have important technological applications in different industrial areas (e.g., hydrogen storage, catalysis, hydrogen sensors, etc.).