Fabrication of palladium-copper nanoparticles with controllable size and chemical composition.

Author(s) Liu, S.; Li, Y.; Ta, N.; Zhou, Y.; Wu, Y.; Li, M.; Miao, S.; Shen, W.
Journal J Colloid Interface Sci
Date Published 2018 Sep 15

A series of PdCu (x = 20, 40, 60, 80) particles with the sizes of 7-9 nm were fabricated by a two-step polyol reduction process, which differentiated the nucleation and growth steps of the nanoparticles. The primary reduction of Pd by ethylene glycol at 393 K formed appreciable amounts of Pd nuclei, while the subsequent reduction at 473 K fully reduced the Pd and Cu species with the aid of the initially formed Pd nuclei seeds. Meanwhile, the releasing oleylamine, previously coordinated with metal cations, acted as the capping agent to segregate the nanoparticles. Both parameters simultaneously controlled the assembly kinetics of the bimetallic nanoparticles and resulted in uniform sizes and designed chemical compositions. Among them, the PdCu nanoparticles showed quite promising activity and selectivity for the hydrogenation of nitrobenzene under mild conditions.

DOI 10.1016/j.jcis.2018.04.109
ISSN 1095-7103
Citation J Colloid Interface Sci. 2018;526:201206.

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