{"title":"High-entropy design of Ruddlesden-Popper structured LNO for enhanced performance in proton solid oxide fuel cells","authors":"","doi":"10.1016/j.fuel.2024.133430","DOIUrl":null,"url":null,"abstract":"<div><div>Protionic Ceramic Fuel Cells (PCFCs) are devices that efficiently convert chemical energy to electrical energy at low temperatures. Significant research efforts have been directed towards the development of cathodes with enhanced catalytic activity. In this work, a high-entropy approach was employed at the A site of La<sub>2</sub>NiO<sub>4+δ</sub> (LNO) with a Ruddlesden-Popper (R-P) structure, resulting in the synthesis of the LaPr<sub>0.2</sub>Sm<sub>0.2</sub>Ba<sub>0.2</sub>Sr<sub>0.2</sub>Ca<sub>0.2</sub>NiO<sub>4+δ</sub> (HE-LPSBSCN) cathode. A comprehensive series of tests demonstrated that this high-entropy strategy improved the oxygen reduction reaction (ORR) activity, hydration behavior, well operational stability, and electronic conductivity of LNO. The HE-LPSBSCN cathode demonstrated record-breaking performance, achieving a maximum power density of 2004 mW cm<sup>−2</sup> at 700 °C. This finding provides novel insights for the rational design and optimization of highly catalytically active cathodes for PCFCs.</div></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":null,"pages":null},"PeriodicalIF":6.7000,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fuel","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0016236124025791","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
Protionic Ceramic Fuel Cells (PCFCs) are devices that efficiently convert chemical energy to electrical energy at low temperatures. Significant research efforts have been directed towards the development of cathodes with enhanced catalytic activity. In this work, a high-entropy approach was employed at the A site of La2NiO4+δ (LNO) with a Ruddlesden-Popper (R-P) structure, resulting in the synthesis of the LaPr0.2Sm0.2Ba0.2Sr0.2Ca0.2NiO4+δ (HE-LPSBSCN) cathode. A comprehensive series of tests demonstrated that this high-entropy strategy improved the oxygen reduction reaction (ORR) activity, hydration behavior, well operational stability, and electronic conductivity of LNO. The HE-LPSBSCN cathode demonstrated record-breaking performance, achieving a maximum power density of 2004 mW cm−2 at 700 °C. This finding provides novel insights for the rational design and optimization of highly catalytically active cathodes for PCFCs.
期刊介绍：
The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.
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