Control of composition and size for Pd–Ni alloy nanowires electrodeposited on highly oriented pyrolytic graphite

Abstract

In order to fabricate effective Pd-Ni alloy nanowire arrays with given compositions and size, the process of nucleation and growth and the dependence of alloy composition on deposition potential were investigated. The results reveal that the compositions and sizes of Pd-Ni alloy nanowires can be controlled within a desired range through adjusting suitable nucleation and growth potentials as well as the time. The Ni content in the alloy nanowires was found to vary from 6 to 28% when the deposition potential was changed from -0.3 to -1.9 V. A growth potential of -0.35 to -0.50 V was applied to fabricate Pd-Ni alloy nanowires with 8-15% Ni content. Continuous and parallel nanowire arrays can be successfully fabricated when nucleation is performed at a potential of -1.2 V for 50 ms with further growth at -0.45 V for 800 s. Pd-Ni crystal phases exist in the alloy structure forms of h111i, h200i, h220i, h311i. The nanowires have an average diameter of 150 nm and a length of 100-450 lm.

Hydrogen Storage in Porous Single-Walled Carbon Nanohorns Dispersed with Pd–Ni Alloy Nanoparticles

“…An XRD pattern of Pd–Ni/SWCNHs synthesized from Pd and Ni wires with diameters of 0.3 mm is shown in Figure . Note that the XRD peak should appear at an angle between the peaks of pure Pd and pure Ni when Pd and Ni are alloyed. , Thus, Figure confirms that Pd and Ni components of the Pd–Ni/SWCNHs were completely alloyed and no independent crystals of Pd or Ni were detected. The Pd–Ni/SWCNHs synthesized from a Ni wire of 0.2 mm diameter exhibited a similar result.…”

Nanostructures of Pd–Ni alloy deposited on carbon fibers for sensing hydrogen

“…Previous work in our group [30] has proved that on HOPG piece continuous nanowires could be obtained under three potential pulses, while on carbon fibers thin Pd-Ni alloy nanofilm was obtained with this method. Fig.…”

Controlled Syntheses of Various Palladium Alloy Nanoparticles Dispersed in Single-Walled Carbon Nanohorns by One-Step Formation Using an Arc Discharge Method

“…It can be seen that the peak from the product appears at a position (2θ = 41.0°) between the peaks of pure Pd (2θ = 39.8°) and Fe (2θ = 42.1°). The shift of the peak position of Fe toward Pd in Pd–Fe/SWCNHs suggests that Fe in the products is alloyed with Pd. , Note that Pd–Fe/SWCNHs exhibited a prominent peak at 41.0° but not at 39.8 or 42.1°, indicating that all Pd and Fe in the product were present as alloy components.…”