Synthesis of Pd-Ru solid-solution nanoparticles by pulsed plasma in liquid method.

Area of Science:

• Materials Science
• Nanotechnology
• Physical Chemistry

Background:

• Palladium-ruthenium (Pd-Ru) alloys are of interest for catalytic and electronic applications.
• Synthesizing homogeneous solid-solution nanoparticles in immiscible systems presents challenges.

Purpose of the Study:

• To synthesize Pd-Ru solid-solution nanoparticles with controlled compositions.
• To characterize the structural and compositional properties of the synthesized nanoparticles.

Main Methods:

• Pulsed plasma in liquid (PPL) method using Pd-Ru mixture bulk electrodes.
• High-resolution transmission electron microscopy (HR-TEM) for particle size and morphology.
• Energy-dispersive X-ray spectroscopy (EDX) for elemental composition.
• X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) for structural analysis.

Main Results:

• Successfully synthesized Pd-Ru solid-solution nanoparticles with varying ratios (1:3, 1:1, 3:1).
• Particle sizes were measured to be <10 nm (floated) and <20 nm (sedimented) via HR-TEM.
• Lattice parameters followed Vegard's law, indicating solid-solution formation.
• EDX, XPS, and XAFS confirmed the solid-solution structure and composition.

Conclusions:

• The PPL method is effective for synthesizing Pd-Ru solid-solution nanoparticles.
• The synthesized nanoparticles exhibit tunable compositions and well-defined solid-solution structures.
• These findings open possibilities for advanced applications of Pd-Ru nanomaterials.