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Anomalous Phase Controlling Phenomenon in Ru and Bi Solid-Solution Alloying by Polyol Method at Ru-Rich Region
Panpan Cui1,2, Bo Huang1,2,3,4
1School of Chemical Engineering and Technology, Xi'an Jiaotong University, Innovation Harbour, Xixian-ward, Xi'an 712000, China.
Inorganic Chemistry
|July 19, 2025
Summary
Researchers synthesized novel Ruthenium-Bismuth (RuBi) solid-solution nanoparticles for the first time. These nanoparticles exhibit a unique face-centered cubic structure, achieved through controlled polyol synthesis methods.
Area of Science:
- Materials Science
- Nanotechnology
- Inorganic Chemistry
Background:
- Bi-based solid-solution alloys are significant but challenging to synthesize.
- Controlling the crystal structure and morphology of nanoparticles is crucial for their properties.
Purpose of the Study:
- To synthesize Ruthenium-Bismuth (RuBi) solid-solution nanoparticles (NPs) using the polyol method.
- To investigate the influence of metal precursors, protecting agent concentration, and reductant on the synthesis outcomes.
- To achieve a stable face-centered cubic (fcc) phase in RuBi NPs.
Main Methods:
- Polyol synthesis method was employed.
- Systematic variation of metal precursors, protecting agent amount, and reductant.
- Characterization using scan transmission electron microscopy (STEM) and energy-dispersive X-ray (EDX) mapping.
Main Results:
- Successfully synthesized RuBi solid-solution NPs with a face-centered cubic (fcc) structure for the first time.
- Achieved the fcc phase even with a hexagonal close-packed Ru precursor, indicating an anomalous phase control.
- Homogeneous atomic-level distribution of Ru and Bi confirmed by STEM-EDX.
Conclusions:
- The anomalous phase control in fcc-RuBi NPs is attributed to the nucleation process involving high-energy Bi atoms.
- The polyol method offers a viable route for synthesizing novel fcc-RuBi solid-solution nanoparticles.
- Demonstrated atomic-level homogeneity in the synthesized RuBi solid-solution nanoparticles.
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