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Preparation and characterization of aqueous colloids of Pt-Ru nanoparticles.
- Source :
-
Journal of colloid and interface science [J Colloid Interface Sci] 2005 Dec 01; Vol. 292 (1), pp. 122-6. Date of Electronic Publication: 2005 Jul 21. - Publication Year :
- 2005
-
Abstract
- A synthetic method for platinum-ruthenium (PtRu) nanoparticles in aqueous media is proposed. This method employs citric acid as a capping agent and NaBH(4) as a reducing agent with the aid of pH control. The number-averaged size of the PtRu nanoparticles was ca. 2 nm. The crystal phase and chemical composition of the nanoparticles was investigated by X-ray diffraction measurement and scanning transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy analysis, which indicated that the nanoparticles mainly consisted of an alloy of Pt and Ru. Electrochemical measurement showed that the PtRu nanoparticles had catalytic activity for methanol oxidation.
- Subjects :
- Alloys chemical synthesis
Alloys chemistry
Catalysis
Electrochemistry
Hydrogen-Ion Concentration
Methanol chemistry
Microscopy, Electron, Scanning methods
Microscopy, Electron, Transmission methods
Oxidation-Reduction
Particle Size
Surface Properties
Water chemistry
X-Ray Diffraction
Colloids chemical synthesis
Colloids chemistry
Nanoparticles chemistry
Platinum chemistry
Ruthenium chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 0021-9797
- Volume :
- 292
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Journal of colloid and interface science
- Publication Type :
- Academic Journal
- Accession number :
- 16039660
- Full Text :
- https://doi.org/10.1016/j.jcis.2005.05.052