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PtRu nanoparticle electrocatalyst with bulk alloy properties prepared through a sonochemical method.

Rukma Basnayake¹, Zhengrong Li, Srilakshmi Katar

¹Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, USA.

Langmuir : the ACS Journal of Surfaces and Colloids

|November 30, 2006

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High-intensity sonochemistry effectively synthesizes platinum-ruthenium (PtRu) alloy nanoparticles. These bimetallic electrocatalysts show promise for fuel cell applications, including CO-tolerant catalysts.

Area of Science:

Nanomaterials Science
Electrochemistry
Catalysis

Background:

Platinum-ruthenium (PtRu) alloys are crucial electrocatalysts in fuel cells.
Developing efficient synthesis methods for bimetallic nanoparticles is essential for advancing fuel cell technology.

Purpose of the Study:

To investigate the properties of PtRu nanoparticles synthesized using high-intensity sonochemistry.
To evaluate their potential as electrocatalysts for fuel cell reactions.

Main Methods:

Sonochemical synthesis of PtRu nanoparticles in tetrahydrofuran (THF).
Characterization using X-ray diffraction (XRD).
Electrochemical evaluation via cyclic voltammetry for CO stripping and methanol oxidation.

Main Results:

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Sonication produced PtRu alloy nanoparticles with compositions close to the initial metal ion ratios.
The synthesized nanoparticles exhibited electrochemical responses similar to bulk PtRu alloys.
The materials demonstrated potential for CO stripping and methanol oxidation catalysis.

Conclusions:

High-intensity sonochemistry is a viable method for producing nanometer-scale PtRu bimetallic electrocatalysts with alloy properties.
These PtRu nanoparticles are suitable for mechanistic studies in fuel cell reactions.
The synthesized materials can serve as platforms for developing CO-tolerant fuel cell catalysts.