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10-10-2020 | Original Article

Characterization of CeO₂ microspheres fabricated by an ultrasonic spray pyrolysis method

Authors: Shou-Feng Xue, Yi-Juan Li, Feng-Hua Zheng, Xue Bian, Wen-Yuan Wu, Cheng-Hao Yang

Published in: Rare Metals | Issue 1/2021

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Abstract

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 °C. Scanning electron microscopy (SEM) and transmission 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 formation mechanism and distribution of residual Cl in the fabricated 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.

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Title: Characterization of CeO2 microspheres fabricated by an ultrasonic spray pyrolysis method
Authors: Shou-Feng Xue
Yi-Juan Li
Feng-Hua Zheng
Xue Bian
Wen-Yuan Wu
Cheng-Hao Yang
Publication date: 10-10-2020
Publisher: Nonferrous Metals Society of China
Published in: Rare Metals / Issue 1/2021
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-020-01594-z

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