Composite manganate oxygen electrode enhanced with iron oxide nanocatalyst for high temperature steam electrolysis in a proton-conducting solid oxide electrolyzer. (6th July 2015)

• Record Type: Journal Article
• Authors: Li, Huaxin; Chen, Xiaoli; Chen, Shigang; Wu, Yucheng; Xie, Kui
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 25(2015)
• Page Start: 7920
• Page End: 7931
• Publication Date: 2015-07-06
• Subjects: Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.04.067
• Languages: English
• ISSNs: 0360-3199

Abstract

<abstract xml:lang="en" abstract-type="author" id="abs0010"> <title id="sectitle0010">Abstract</title> <sec> <p id="abspara0010">Composite electrode based on La_0.8Sr_0.2MnO_3-δ (LSM) can be utilized in a proton-conducting solid oxide electrolyzer for steam electrolysis; however, the insufficient electro-catalytic activity of LSM still restricts the electrode performance and Faraday current efficiency. In this work, catalytic-active iron oxide nanoparticles are loaded on the surface of LSM composite oxygen electrode to improve electro-catalytic performance as well as extend the three-phase boundaries. SEM and EDS results together confirm the loading of Fe₂O₃ nanoparticles with the size of approximately 20–40 nm on the surface of LSM composite oxygen electrode. The effects on electrode performance due to different contents of Fe₂O₃ are loaded into LSM composite electrodes are systemically studied using symmetric cells. The electrical property of LSM is investigated and correlated to the electrochemical performance of the composite oxygen electrode in electrolysis cells. The maximum Faraday current efficiency is approximately 65% with the Fe₂O₃-loaded LSM composite electrode for steam electrolysis in a proton-conducting solid oxide electrolyzer at 800 °C.</p> </sec> </abstract>