Sub-Stoichiometric Titania as a Viable Support for Pt Electrodes
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Bell, Crystal Nacolle
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Abstract
The growing demand for fossil fuels has resulted in inevitable environmental consequences along with the gradual depletion of fuel sources. As a result, extensive efforts are focused on developing environmentally benign and sustainable alternatives such as fuel cells. While fuel cells alone would not rid greenhouse gas emissions, they can contribute to their reduction. Barriers hindering the commercialization of fuel cells include performance, durability, cost, and storage. A major contributor to the high cost of fuel cells is the use of Pt at the electrode. Therefore, research has been devoted to overcoming these issues by reducing the loading of Pt, alloying Pt with a less noble metal, implementing Pt free catalyst. Furthermore, carbon has been the most traditionally used catalyst support in fuel cell applications; however, carbon is susceptible to corrosion resulting in the loss of the support and Pt nanoparticle agglomeration/detachment. In this thesis, I showcase the synthesis, characterization, and use of Ti2O3 and Ti3O5 supports as a stable support for Pt-based electrocatalyst use in several prominent fuel cell reactions.
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2021-05-18
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Dissertation