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Synthesis and Characterization of Amphiphilic Gold Nanoparticles
Published on: July 2, 2019
Size effect in thiol and amine binding to small Pt nanoparticles.
J Yang1, Jim Yang Lee, Heng-Phon Too
1Department of Chemical and Biomolecular Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore.
Analytica Chimica Acta
|August 29, 2007
Summary
The binding affinity of 1-dodecanethiol to platinum (Pt) nanoparticles increases with size, while dodecylamine
Area of Science:
- Nanomaterials Science
- Catalysis
- Electrochemistry
Background:
- Platinum (Pt) nanoparticles are crucial catalysts in fuel cells.
- Surface functionalization affects nanoparticle properties and catalytic activity.
- Understanding ligand-nanoparticle interactions is key for catalyst design.
Purpose of the Study:
- To compare the binding affinities of 1-dodecanethiol and dodecylamine to Pt nanoparticles.
- To investigate how these affinities influence catalytic activity in methanol electro-oxidation.
- To determine the effect of nanoparticle size on ligand binding and catalysis.
Main Methods:
- Synthesis of Pt nanoparticles of varying sizes.
- Adsorption studies to quantify binding affinities of thiol and amine ligands.
- Electrochemical measurements of methanol electro-oxidation activity.
Main Results:
- 1-dodecanethiol's affinity for Pt nanoparticles increases with particle size.
- Dodecylamine's affinity for Pt nanoparticles decreases with increasing particle size.
- Catalytic activity in methanol electro-oxidation varied with nanoparticle size and ligand type.
Conclusions:
- Ligand choice and Pt nanoparticle size significantly impact catalytic performance.
- Larger Pt nanoparticles can exhibit higher catalytic activity up to a critical size.
- This study provides insights into optimizing Pt nanoparticle catalysts for fuel cell applications.
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