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Updated: May 23, 2026
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Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
Published on: August 23, 2018
A remarkable anion effect on palladium nanoparticle formation and stabilization in hydroxyl-functionalized ionic
Xiao Yuan1, Ning Yan, Sergey A Katsyuba
1Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
Physical Chemistry Chemical Physics : PCCP
|March 27, 2012
Summary
Hydroxyl-functionalized ionic liquids enable the synthesis of small palladium nanoparticles (NPs). The hydroxyl group accelerates formation and protects palladium NPs from oxidation, with anion choice influencing both processes.
Area of Science:
- Materials Science
- Nanotechnology
- Physical Chemistry
Background:
- Ionic liquids (ILs) offer tunable properties for nanomaterial synthesis.
- Controlling palladium nanoparticle (Pd NP) size and stability is crucial for catalytic applications.
- The role of functional groups in ILs for NP formation and stabilization requires further investigation.
Purpose of the Study:
- To synthesize small palladium nanoparticles (NPs) using hydroxyl-functionalized ionic liquids (ILs).
- To investigate the effect of the hydroxyl group on Pd NP formation and oxidation.
- To determine the influence of various anions on Pd NP synthesis and stability.
Main Methods:
- Decomposition of palladium acetate (Pd(OAc)(2)) in hydroxyl-functionalized ILs.
- Characterization of Pd NP size and size distribution.
- Assessment of Pd NP oxidation using remaining Pd(OAc)(2) amounts.
- Density Functional Theory (DFT) calculations to rationalize interactions.
Main Results:
- Pd NPs with sizes between 2.3 ± 0.4 nm and 4.0 ± 0.6 nm were synthesized.
- The hydroxyl group accelerated Pd NP formation and provided protection against oxidation compared to non-functionalized ILs.
- The ease of Pd NP formation and oxidation protection varied with the IL anion, following specific trends.
- DFT calculations provided insights into the interactions between Pd NPs, the cation, and anions.
Conclusions:
- Hydroxyl-functionalized ILs are effective media for synthesizing small, stable Pd NPs.
- The IL anion plays a significant role in modulating Pd NP formation kinetics and oxidative stability.
- The findings offer a pathway for designing IL-based systems for controlled nanomaterial synthesis.
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