Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"OXYGEN SURFACE EXCHANGE"”.
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Electrochemomechanics in Mixed Ionic Electronic Conductors and solid oxide cells
… characteristics in solid oxide cells with oxygen surface exchange and results are compared with experimental cell operation. The model is used to study the effect of oxygen surface exchange and the bulk diffusion of defects on the performance of solid oxide cell. In the fourth chapter, the …
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Fundamental studies of perovskite related oxide thin films for oxygen electrocatalysis at intermediate temperatures
… currently utilized for applications including oxygen permeation membranes and solid oxide fuel cells (SOFCs), but alternative materials with higher catalytic activity and stability are required for intermediate temperature (500 - 700 °C) oxide electrocatalysts. In this thesis, two promising …
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Cathode polarization effects in rare Earth nickelate cathodes for solid oxide fuel cells
… For this application, pure pressurized oxygen would be used as the oxidant which motivates the search for a cathode material which would be optimal for a high oxygen partial pressure environments. Specifically, this research focuses on cathode materials which can exploit the unique …
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Controlling and understanding electro-chemo-mechanical properties of layered cuprate thin films
Surface exchange kinetics are a key indicator of performance for electrochemical devices including solid oxide fuel cells. Due to broad flexibility in dopant selection and concentration, mixed ionic-electronic conducting (MIEC) ABO₃ perovskite oxides have been extensively explored as model systems …
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Numerical simulations of ion transport membrane oxy-fuel reactors for CO₂ capture applications
… performed to investigate the key features of oxygen permeation and hydrocarbon conversion in ion transport membrane (ITM) reactors. ITM reactors have been suggested as a novel technology to enable air separation and fuel conversion to take place simultaneously in a single unit. Possessing the …
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Defect equilibria and electrode kinetics in Prx̳Ce1̳-̳x̳O2̳-̳[̳d̳e̳l̳t̳a̳]̳ mixed conducting thin films : an in-situ optical and electrochemical investigation
An improved fundamental understanding of oxygen defect equilibria and transport kinetics in oxides is essential for achieving enhanced performance and longevity in many oxide-based practical applications. The ability to diagnose a material's behavior in a thin film structure under operating …
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Electro-chemo-mechanical Studies of Perovskite-Structured Mixed Ionic-Electronic Conducting SrSni-₁₋xFexO₃₋x/₂₊[epsilon]
… is significant loss in efficiency, of which slow surface reaction kinetics at the cathode are most responsible. Previously, the mixed ionic and electronic conducting (MIEC) perovskite-structured SrSni-₁₋xFexO₃₋x/₂₊[epsilon] (STF) materials system was identified as a promising candidate for SOFC …
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Relating multiscale structure and chemistry with oxygen exchange kinetics in low-thermal-budget Sr(Ti,Fe)O3-d and high-throughput combinatorial thin films
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01