Skip to main content

Effects of Extrinsic and Intrinsic Proton Activity on The Mechanism of Oxygen Reduction in Ionic Liquids


Abstract Mechanisms for oxygen reduction are proposed for three distinct cases covering two ionic liquids of fundamentally different archetypes and almost thirty orders of magnitude of proton activity. Proton activity is treated both extrinsically by varying the concentration and intrinsically by selecting proton donors with a wide range of aqueous pKa values. The mechanism of oxygen reduction in ionic liquids is introduced by way of the protic ionic liquid (pIL) triethylammonium triflate (TEATf) which shares some similarities with aqueous acid solutions. Oxygen reduction in TEATf begins as the one electron rate limited step to form superoxide, O2*-, which is then rapidly protonated by the pIL cation forming the perhydroxyl radical, HO2*. The perhyd... (more)
Created Date 2011
Contributor Zeller, Robert August (Author) / Friesen, Cody (Advisor) / Sieradzki, Karl (Committee member) / Buttry, Daniel (Committee member) / Arizona State University (Publisher)
Subject Materials Science / Chemistry / Energy / Fuel Cell / Ionic Liquid / Metal-Air / Oxygen Reduction / Proton Activity
Type Doctoral Dissertation
Extent 114 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Ph.D. Materials Science and Engineering 2011
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


  Full Text
6.0 MB application/pdf
Download Count: 2703

Description Dissertation/Thesis