title: Kinetics-controlled growth of bimetallic RhAg on Au nanorods and their catalytic properties.
abstract: Controlled growth of hybrid metallic nanocomposites for a desirable structure in a combination of selected components is highly important for their applications. Herein, the controllable growth of RhAg on the gold nanorods is achieved from the dumbbell-like RhAg-tipped nanorods to the brushy RhAg-coated nanorods, or the rod-like Au@Ag-Rh nanorattles. These different growth modes of RhAg on the gold nanorods are correlated with the reducing kinetics of RhCl₃ and AgNO₃. In view of the promising catalytic properties of Rh, the gold nanorods modified by RhAg in different structures are examined as catalysts for the oxidation of o-phenylenediamine. It is found that brushy RhAg-coated nanorods present a higher catalytic efficiency than dumbbell-like RhAg-tipped nanorods and rod-like Au@Ag-Rh nanorattles. These results would benefit the overgrowth control on the one-dimensional metallic nanorods and the rational design of new generation heterogeneous catalysts and optical devices.
authors.affiliation: Key Laboratory of Colloid and Interface Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P.R. China. yangjian@sdu.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Ye
authors.forename: Xia
authors.initials: X
authors.lastname: Guo
authors.forename: Fang
authors.initials: F
authors.lastname: Xie
authors.forename: Rui
authors.initials: R
authors.lastname: Zhu
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhao
authors.forename: Jian
authors.initials: J
authors.lastname: Yang
mesh_terms: D002384:Catalysis; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D010084:Oxidation-Reduction; D010655:Phenylenediamines / Q000737:chemistry*; D012238:Rhodium / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*
chemical_list: D010655:Phenylenediamines; D012834:Silver; D006046:Gold; D012238:Rhodium