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dc.contributor.advisorBaker, Robert
dc.creatorWare, Skyler
dc.date.accessioned2020-01-22T22:11:32Z
dc.date.available2020-01-22T22:11:32Z
dc.date.issued2018-05
dc.identifier.urihttp://hdl.handle.net/1811/90838
dc.description.abstractThe electrochemical conversion of carbon dioxide to value-added, multi-carbon products has been studied as a pathway to renewable fuel sources and as an alternative to current carbon capture and storage methods. Delafossite copper iron oxide films have been shown to thermally fixate carbon dioxide and selectively catalyze carbon-carbon bond coupling from CO2 to produce acetate. However, the catalyst alone is not stable and deactivates after approximately ten minutes following the reductive dissolution of surface iron species. The addition of gaseous oxygen as a sacrificial electron acceptor prevents the reductive dissolution of iron and stabilizes the catalyst for several hours; however, excess oxygen scavenges the electrons used for acetate production, resulting in lower yield and reduced conversion efficiency. The purpose of this study was to examine the effects of oxygen at various flow rates on catalyst stability and on acetate formation, as well as to determine the sources of carbon and hydrogen in the final product. The electrolyte solution was purged with both carbon dioxide and oxygen before and during electrolysis using the copper iron oxide catalyst as the working electrode. The optimal oxygen flow rate significantly slowed iron reduction and stabilized the catalyst for up to 12 hours with only a modest drop in acetate selectivity. This enhanced stability allowed further characterization of the carbon source as thermally fixed ambient CO2, which occurs during annealing of the catalyst. Future studies will further examine the surface chemistry over long-term reductions, including the full mechanism of acetate production and the role of both metals and their oxidation states in the catalytic process.en_US
dc.description.sponsorshipAir Force Office of Scientific Researchen_US
dc.description.sponsorshipOSU Mayers Summer Research Fellowshipen_US
dc.description.sponsorshipOSU College of Arts and Sciences Honors Undergraduate Research Scholarshipen_US
dc.language.isoen_USen_US
dc.publisherThe Ohio State Universityen_US
dc.relation.ispartofseriesThe Ohio State University. Department of Chemistry and Biochemistry Honors Theses; 2018en_US
dc.subjectCO2 reductionen_US
dc.subjectelectrochemistryen_US
dc.subjectC-C bond couplingen_US
dc.subjectcatalysisen_US
dc.subjectcopper iron oxideen_US
dc.titleImproved Stability of a C-C Bond Coupling Catalyst for Conversion of CO2 to Acetateen_US
dc.typeThesisen_US
dc.description.embargoA one-year embargo was granted for this item.en_US
dc.description.academicmajorAcademic Major: Chemistryen_US


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