Characterization of CeO2 microspheres fabricated by an ultrasonic spray pyrolysis method

• 作者: Shou-Feng Xue Yi-Juan Li Feng-Hua Zheng Xue Bian Wen-Yuan Wu Cheng-Hao Yang
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 31-39
• 页数: 9页
• 语种: 英文

摘要

CeO2 is one of the main catalysts for solid oxide fuel cell(SOFC).It is critical to find a green and cost-effective fabrication method for CeO2 at scale.In this study,the CeO2 microspheres were prepared by one-step ultrasonic spray pyrolysis of cerium chloride solution at 700℃.Scanning electron microscopy(SEM)and trans-mission electron microscopy(TEM)study demonstrate that the prepared CeO2 microspheres exhibit a particle size of 0.01-1.08 μm with a mean particle size of 0.23 μm,and more than 94％of the particles have a diameter less than 0.5 μm.But the presence of residual Cl in the fabricated CeO2 microspheres blocks the active sites and leads to the significant degradation of SOFC performance.The forma-tion mechanism and distribution of residual Cl in the fab-ricated CeO2 microspheres were systemically studied.The water washing method was shown to effectively reduce the residual Cl in the CeO2 microspheres.Overall,this work provides a clean manufacturing process for the preparation of SOFC electrode/electrolyte materials.