合成鉑銠金屬粒子擔持在石墨烯電極觸媒對甲醇氧化之研究

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合成鉑銠金屬粒子擔持在石墨烯電極觸媒對甲醇氧化之研究

Synthesis of the Pt and Rh nanoparticles on graphene for methanol oxidation

許壹忠 , Masters　　Advisor：鄭紀民　　

繁體中文

石墨烯；甲醇氧化；電化學；奈米金屬粒子； Graphene ； methanol oxide ； electrochemical ； nanoparticle

Abstract │ Reference (56) │ Altmetrics

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Global is facing energy and environmental crisis，many countries in the world are bound to develop alternative energy to displace petroleum fuels. Alternative energies can be more safe and clean to the environments such as hydrogen energy and fuel cell. The methanol fuel cell has been one of the alternative energy projects to due to its high energy conversion ratio and low pollution. But methanol fuel cell produces carbon monoxide during reaction process and deactivate the platinum catalyst in the methanol fuel cell. In the past few years, most of the catalysts with high porosity properties has been used in the methanol fuel cell. such as carbon block and carbon nanotubes. These carbonaceous materials have good electrical conductivity and high surface area. In recent years, many studies show that graphene have unigue structure, mechanical, physical and chemical properties. These excellent properties provide more active surface sites for a specific reaction.
The purpose of this study is to prepare a good support that to anchor platinum metal using as anode electrocatalyst material. The anode material will use graphene. First prepare graphene material. The Hummers method will be applied to make graphite oxide as a metallic precursor using dihydrogen hexachloroplatinate hexahydrate as the metallic precursor. To evaluate the performance of the methanol fuel cell with the function of metal concentration and to find the optimum reduction temperature for metal to disperse on graphene. Finally, rhodium can be used as second metallic to assistant catalyst. The metallic crystal phase can be determined by XRD, and particle size and dispersion of the metal can be observed by TEM. The catalyst has the tolenace toward CO resistance by changing redox current ratio and reaches the methanol fuel cell efficient can be determined by controlling Pt/Rh ratio particle size and dispersion.

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