{"title":"In-situ transformation of a perovskite oxide from irregular particles into nanosheets for active and durable solid oxide fuel cell cathodes","authors":"Shuai Ma, Shengli Pang, Xudong He, Hao Lou, Kaijie Xu, Yaozheng Qian, Fang Yang, Yi Zhuang, Xuyao Luo, Lianxu Xu, Yifei Gao, Peijie Zhang, Qiangsheng Xiao, Chonglin Chen","doi":"10.1016/j.jmat.2025.101058","DOIUrl":null,"url":null,"abstract":"Solid oxide fuel cells (SOFCs) are of paramount importance for developing green and sustainable energy systems. However, achieving stable nanoscale cathode catalysts under their typically high operating temperatures, normally exceeding 600 °C, remains a significant challenge. By introducing a small amount of RuCl<sub>3</sub> into the cathode slurry, an in-situ transformation of the PrBaCo<sub>2</sub>O<sub>5+<em>δ</em></sub> cathode catalyst can be induced from submicrometer-scale irregular particles into nanosheets during SOFC operation. These nanosheets feature a RuO<sub>2</sub>-modified surface layer, resulting in substantial improvements in both catalytic activity and operational durability. At 750 °C and 0.7 V, SOFCs employing conventional cathode catalysts exhibit a 6.1% degradation in power density over 110 hours, while those employing the nanosheet-structured catalysts achieve an 11.9% increase, ultimately stabilizing at a high-power density of 0.75 W/cm<sup>2</sup>. This work presents a simple and scalable strategy for constructing high-performance nanocatalysts and deepens our theoretical understanding of catalyst nanostructuring for SOFC applications.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"38 1","pages":""},"PeriodicalIF":8.4000,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materiomics","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.jmat.2025.101058","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Solid oxide fuel cells (SOFCs) are of paramount importance for developing green and sustainable energy systems. However, achieving stable nanoscale cathode catalysts under their typically high operating temperatures, normally exceeding 600 °C, remains a significant challenge. By introducing a small amount of RuCl3 into the cathode slurry, an in-situ transformation of the PrBaCo2O5+δ cathode catalyst can be induced from submicrometer-scale irregular particles into nanosheets during SOFC operation. These nanosheets feature a RuO2-modified surface layer, resulting in substantial improvements in both catalytic activity and operational durability. At 750 °C and 0.7 V, SOFCs employing conventional cathode catalysts exhibit a 6.1% degradation in power density over 110 hours, while those employing the nanosheet-structured catalysts achieve an 11.9% increase, ultimately stabilizing at a high-power density of 0.75 W/cm2. This work presents a simple and scalable strategy for constructing high-performance nanocatalysts and deepens our theoretical understanding of catalyst nanostructuring for SOFC applications.
期刊介绍:
The Journal of Materiomics is a peer-reviewed open-access journal that aims to serve as a forum for the continuous dissemination of research within the field of materials science. It particularly emphasizes systematic studies on the relationships between composition, processing, structure, property, and performance of advanced materials. The journal is supported by the Chinese Ceramic Society and is indexed in SCIE and Scopus. It is commonly referred to as J Materiomics.