An Effective Strategy for Room-Temperature Synthesis of Single-Crystalline Palladium Nanocubes and Nanodendrites in Aqueous Solution

Abstract

Nearly monodisperse single-crystalline palladium (Pd) nanocubes and nanodendrites have been successfully prepared in aqueous solution at room temperature, for the first time, mainly by utilizing the equilibrium between the dissolution and precipitation of the Pd-cetyltrimethylammonium bromide (Pd-CTAB) complexes. The morphology of the obtained Pd nanocrystals call be tuned by the addition of foreign halide ions (Cl- and Br-). The corresponding selected area electron diffraction (SAED) and X-ray diffraction (XRD) patterns confirmed that the synthesis of nanocubes and nanodendrites are single-crystalline pure Pd structures with fee crystal lattice. A preliminary formation mechanism based on the dissolution and precipitation of the Pd-CTAB complexes and competitive adsorption between different ions oil the nanoparticle Surface has been proposed.Natural Science Foundation of China [20620130427]; Ministry of Science and Technology [2007CB815303]; Department of Chemistry, Xiamen University [J0630429

Ultrafast growth of dendritic gold nanostructures and their applications in methanol electro-oxidation and surface-enhanced Raman scattering

“…As a class of water-soluble cationic polyelectrolyte, PDDA has been developed as a reducing and/or a stabilizing agent for the synthesis of Pt [29], Au [29,30], and Pd [31] nanoparticles. Generally, the reduction kinetics depends on reagent concentration [3] and the shape and size of the samples may be well controlled by varying the reagent concentration.…”

Truncated palladium nanocubes: Synthesis and the effect of OH− concentration on their catalysis of the alkaline oxygen reduction reaction

“…Methods to synthesize dispersible Pd nanocubes have been reported by several groups [12][13][14][15][16][17][18]. Xia and coworkers [15,16] performed exquisite work on the synthesis of Pd nanocubes in a solution in which Br À ions and poly(vinyl pyrrolidone) (PVP) were used as a shape-controlling agent and as a stabilizer, respectively.…”

Controlled synthesis and properties of palladium nanoparticles

“…Pd NPs less than 20 nm can catalyse a variety of reactions including the oxidation of carbon monoxide, the selective oxidation of hydrocarbons, dehydrogenation of alcohols and water-gas shift reaction [1][2][3]. Pd nanocatalysts retain their catalytic properties while left unsupported in an aqueous suspension [9][10][11], making them ideal for studying the size dependency of the catalytic behaviour without the influence of supports based on new oxides and ceramics. Pd NPs can catalyse other reactions when they are supported on a suitable material that can interact with the metal [1,[12][13][14].…”