Production of Oxygen Gas and Liquid Metal by Electrochemical Decomposition of Molten Iron Oxide
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Sadoway_Production of oxygen.pdf
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1.14 MB
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Adobe PDF
Checksum (MD5)
1f60e5cc695a8bb301700de2655718cc
Author(s)
Wang, Dihua
Gmitter, Andrew J.
Sadoway, Donald Robert
Date Issued
April 2011
Journal
Journal of The Electrochemical Society
Publisher
The Electrochemical Society
Citation
Wang, Dihua, Andrew J. Gmitter, and Donald R. Sadoway. “Production of Oxygen Gas and Liquid Metal by Electrochemical Decomposition of Molten Iron Oxide.” Journal of The Electrochemical Society 158, no. 6 (2011): E51. © 2011 ECS - The Electrochemical Society
Version
Final published version
Abstract
Molten oxide electrolysis (MOE) is the electrolytic decomposition of a metal oxide, most preferably into liquid metal and oxygen gas. The successful deployment of MOE hinges upon the existence of an inert anode capable of sustained oxygen evolution. Herein we report the results of a program of materials design, selection, and testing of candidate anode materials and demonstrate the utility of iridium in this application. An electrolysis cell fitted with an iridium anode operating at 0.55 A cm[subscript −2] produced liquid metal and oxygen gas by the decomposition of iron oxide dissolved in a solvent electrolyte of molten MgO–CaO–SiO[subscript 2]–Al[subscript 2]O[subscript 3]. The erosion rate of iridium was measured to be less than 8 mm y[subscript −1]. The stability of iridium is attributed to a mix of mechanisms including the electrochemical formation and simultaneous thermal decomposition of a surface film of iridium oxide.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1149/1.3560477
