PtRu nanoparticle electrocatalyst with bulk alloy properties prepared through a sonochemical method.
Langmuir
; 22(25): 10446-50, 2006 Dec 05.
Article
in En
| MEDLINE
| ID: mdl-17129014
ABSTRACT
Properties of PtRu nanoparticles prepared using high-intensity sonochemistry are reported. Syntheses were carried out in tetrahydrofuran (THF) containing Ru3+ and Pt4+ in a fixed mole ratio of either 110 or 11. X-ray diffraction measurements confirmed sonocation produces an alloy phase and showed that the composition of the nanometer scale metal particles is close to the mole fraction of Ru3+ and Pt4+ in solution with deviations that tend toward Ru enrichment in the alloy phase. The materials gave responses that are similar in terms of peak potential and current density, referenced to the catalyst active surface area, to those of bulk alloys in voltammetry experiments involving CO stripping and CH3OH electrochemical oxidation in 0.1 M H2SO4. The results show that sonochemical methods have the potential to produce nanometer scale bimetallic electrocatalysts that possess alloy properties. The materials have application in mechanistic studies of fuel cell reactions and as platforms for the development of CO tolerant fuel cell catalyst.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Langmuir
Journal subject:
QUIMICA
Year:
2006
Document type:
Article
Affiliation country:
United States