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Palladium Catalysts for the Enhanced Electrochemical Oxidation of Small Organic Fuels for Fuel Cells and Detection
Başlık:
Palladium Catalysts for the Enhanced Electrochemical Oxidation of Small Organic Fuels for Fuel Cells and Detection
Yazar:
Estrada Tiempos, Jose, author.
ISBN:
9780438055469
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (149 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: John L. Haan Committee members: John L. Haan; Paula Hudson; Andrew Petit.
Özet:
The increasing demand for renewable energy sources has accelerated endeavors for the optimization of biomass fuel oxidation for direct liquid fuel cells. Good efficiency for electrochemical oxidation of biomass and other has been observed on palladium (Pd) based catalysts in alkaline media, but further catalyst optimization is required to increase the viability of these fuels for direct liquid fuel cells. As such this work explored the use of a single-walled carbon nanotube support for Pd catalysts (Pd/CNT), in place of a traditional Pd/C (carbon supported) catalyst, for the enhanced oxidation of renewable fuels: formate, ethanol, 1-propanol, 2-propanol, ethylene glycol, propylene glycol, and glycerol. Of these fuels, the greatest electrochemical enhancement, evaluated via chronoamperometry (CA), was observed for the oxidation of formate, propylene glycol, and ethylene glycol a 2.6, 2.6, and 2.5 fold increase compared to Pd/C, respectively. Furthermore, bimetallic alloy catalysts, such as PdCu/C have also been shown to promote the oxidation of these fuels. As such, a Pd 62Cu37/CNT catalyst was used to investigate whether the individual enhancements due to a Cu adatom and a CNT support are additive. Finally, the efficient electrochemical oxidation of ethylene glycol and glycerol on carbon supported Pd catalysts (Pd/C and PdCu/C), at high concentration and high pH, inspired the exploration of these catalysts for the electrochemical detection of ethylene glycol and glycerol. This work shows that a CA pulsed method is viable for the detection of ethylene glycol on leached-Pd10Cu 90/C and glycerol on Pd/C or leached-Pd10Cu90/C.
Notlar:
School code: 6060
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(691781.1) | 691781-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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