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dc.contributor.authorTague, Micheleen_US
dc.date.accessioned2012-12-17T13:50:56Z
dc.date.available2016-12-30T06:47:02Z
dc.date.issued2011-08-31en_US
dc.identifier.otherbibid: 7955501
dc.identifier.urihttps://hdl.handle.net/1813/30690
dc.description.abstractFuel cells represent an alternative energy technology with the potential for providing more efficient means for energy conversion. However, their widespread deployment has been hampered by materials limitations, especially for the catalysts as they can be expensive, easily poisoned, and/or unstable over time. In order to accelerate the discovery and development of electrocatalysts that enhance fuel cell performance, a high throughput method is employed to screen many compositions and phases simultaneously. Preparation of the composition-spread libraries is achieved via cosputtering of multiple elements onto a Ta- or Ti-coated 3-inch Si wafer. These samples are screened as anode electrocatalysts using a fluorescence assay with quinine as the fluorescent probe. A key development is the characterization of these thin films via X-ray diffraction at Cornell's High Energy Synchrotron Source (CHESS). Systems of interest are discussed, including Pt-Zn, Pt-Ta, Pt-M alloys (M= transition metal at concentrations below 40%). Compositions exhibiting promising activity for specific fuels in the fluorescence tests are further characterized using a scanning electrochemical minicell. Alternative materials are introduced, i.e. nitrides and carbides, as well as non-Pt containing metal compositions. Fundamental studies on understanding fuel oxidation in neutral pH are described and further development of the fluorescence screening methodology for the cathode is presented.en_US
dc.language.isoen_USen_US
dc.subjectMethanol oxidationen_US
dc.subjectfuel cellsen_US
dc.subjectPlatinum alloysen_US
dc.subjectcombinatorial screeningen_US
dc.subjectFluorescenceen_US
dc.subjecthigh throughputen_US
dc.titleA Combinatorial Approach For Exploring Fuel Cell Electrocatalystsen_US
dc.typedissertation or thesisen_US
thesis.degree.disciplineChemistry and Chemical Biology
thesis.degree.grantorCornell Universityen_US
thesis.degree.levelDoctor of Philosophy
thesis.degree.namePh. D., Chemistry and Chemical Biology
dc.contributor.chairAbruna, Hector Den_US
dc.contributor.committeeMemberDisalvo, Francis Jen_US
dc.contributor.committeeMemberVan Dover, Robert B.en_US


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