Production of Oxygen Gas and Liquid Metal by Electrochemical Decomposition of Molten Iron Oxide
Production of Oxygen Gas and Liquid Metal by Electrochemical Decomposition of Molten Iron Oxide
复制标题
通过电化学分解熔融氧化铁生产氧气和液态金属
DOI：
10.1149/1.3560477
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发表时间：
2011-01-01
影响因子：
3.9
通讯作者：
Sadoway, Donald R.
中科院分区：
文献类型：
--
作者：
Wang, Dihua;Gmitter, Andrew J.;Sadoway, Donald R.
熔融氧化物电解(MOE)是将金属氧化物电解分解成液态金属和氧气的过程。MOE的成功部署取决于是否存在能够持续放氧的惰性阳极。在这里，我们报告了一个候选阳极材料的材料设计、选择和测试程序的结果，并展示了Ir在这一应用中的用途。一种装有0.55A cm(-2)的Ir阳极的电解槽，通过分解溶解在熔融的MgO-CaO-SiO_2-Al_2O_3的溶剂电解液中的氧化铁产生液态金属和氧气气体。测得Ir的侵蚀速率小于8 mm y(-1)。Ir的稳定性归因于一系列机制的混合，包括电化学形成和氧化Ir表面膜的同时热分解。(C)2011年成立的电化学学会。[DOI：10.1149/1.3560477]版权所有。
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(-2) produced liquid metal and oxygen gas by the decomposition of iron oxide dissolved in a solvent electrolyte of molten MgO-CaO-SiO2-Al2O3. The erosion rate of iridium was measured to be less than 8 mm y(-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. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3560477] All rights reserved.