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Title: Platinum and platinum-ruthenium nanoparticles: Synthesis, characterizations and applications
Keywords: Platinum nanoparticles, Platinum-Ruthenium nanoparticles, Microwave dielectric heating, Methanol oxidation, Electrochemical quartz crystal microbalanc
Issue Date: 20-Jul-2004
Source: LING XING YI (2004-07-20). Platinum and platinum-ruthenium nanoparticles: Synthesis, characterizations and applications. ScholarBank@NUS Repository.
Abstract: This thesis project is focused on the preparation Pt and PtRu alloy nanoparticles by microwave dielectric heating, their characterizations and applications as electrocatalysts in room temperature methanol oxidation reactions. Microwave heating was combined with a phase transfer process to produce nearly spherical and stable thiolated Pt and PtRu alloy nanoparticles, with sizes range from 1.9A?0.4 nm to 7.4A?0.9 nm by adjusting the experimental parameters. Pt and PtRu alloy nanoparticles were used as electrocatalysts for the room temperature oxidation of methanol in two forms: as carbon-supported nanoparticles system, or as assembly of nanoparticles on gold substrate. The electrochemical performance of the heat-treated carbon-supported nanoparticles was expectedly higher than the non-heat-treated ones in acidic electrolyte. Electrochemical quartz crystal microbalance measurement shows high electrocatalytic performance of nanoparticle film in alkaline electrolyte. Pt52Ru48 alloy shows the best electrocatalytic methanol oxidation in both catalyst systems.
Appears in Collections:Master's Theses (Open)

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