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Facile solution synthesis of Ag@Pt core-shell nanoparticles with dendritic Pt shells
1World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan.
Physical Chemistry Chemical Physics : PCCP
|January 31, 2013
Summary
Silver-platinum (Ag@Pt) nanoparticles with dendritic platinum shells were synthesized using nonionic surfactants. These nanostructures demonstrate enhanced tolerance to carbon monoxide during methanol oxidation, showing promise as catalysts.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Nonionic surfactants are crucial for synthesizing dendritic platinum nanostructures.
- Previous research established the role of nonionic surfactants in platinum nanostructure formation.
Purpose of the Study:
- To synthesize various Ag@Pt nanoarchitectures with dendritic Pt shells.
- To evaluate the electrochemical performance of these Ag@Pt nanostructures in methanol oxidation.
Main Methods:
- Synthesis of Ag@Pt nanoparticles using nonionic surfactants at room temperature.
- Characterization of nanostructured Pt shells using ultraviolet-visible absorption spectroscopy and transmission electron microscopy.
- Electrochemical testing of Ag@Pt nanostructures for methanol oxidation reaction (MOR).
Main Results:
- Successfully synthesized Ag@Pt nanoparticles with diverse dendritic Pt shells.
- Confirmed nanostructure morphology via spectroscopy and microscopy.
- Demonstrated superior CO-tolerance in MOR for Ag@Pt nanoparticles with thin dendritic Pt shells (I(f)/I(b) = 3.71).
Conclusions:
- Ag@Pt nanostructures with dendritic Pt shells can be effectively synthesized using nonionic surfactants.
- These nanostructures exhibit excellent CO-tolerant activity, making them promising catalysts for MOR.
