Enhancement of the electrochemical properties for La0.6Sr0.4Co0.2Fe0.8O3−δ oxygen electrode by the addition of CaxCo4O9+δ nano-catalysts

IF 2.6 4区化学 Q3 CHEMISTRY, PHYSICAL Ionics Pub Date : 2024-09-28 DOI:10.1007/s11581-024-05848-z

Lei Wang, Yanting Tian, Zhanfeng Li, Jiping Zhu, Tianlong Bian

{"title":"Enhancement of the electrochemical properties for La0.6Sr0.4Co0.2Fe0.8O3−δ oxygen electrode by the addition of CaxCo4O9+δ nano-catalysts","authors":"Lei Wang, Yanting Tian, Zhanfeng Li, Jiping Zhu, Tianlong Bian","doi":"10.1007/s11581-024-05848-z","DOIUrl":null,"url":null,"abstract":"<div>La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) perovskite with good stability and high oxygen diffusion coefficient has been extensively studied as oxygen electrode in reversible solid oxide cells (RSOCs). Significant promotion of oxygen reaction kinetics of the LSCF oxygen electrode was achieved by the addition of CaxCo4O9+δ (CCOx, x = 3, 1.5) nano-catalysts in the present study. The La0.6Sr0.4Co0.2Fe0.8O3−δ-Ca1.5Co4O9+δ (LSCF-CCO1.5) electrode exhibited the optimal electrochemical property among the LSCF-based electrodes and the lowest polarization resistance (Rp) of 0.039 Ω·cm2 was attained at 800 °C, which was ~ 97% lower than that of the LSFM electrode. Furthermore, the LSCF-CCO1.5 oxygen electrode also manifested excellent thermal cycling stability and alternating polarization durability. The hydrogen production rate of the LSCF-CCO1.5 electrolytic cell was 946 mL·cm−2·h−1 at 1.5 V at 800 °C, which was 2.6 times higher than that of the LSCF cell (362 mL·cm−2·h−1). The results certified the enhancement of electrochemical properties for LSCF oxygen electrode by the addition of CCOx nano-catalysts.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"30 12","pages":"8191 - 8201"},"PeriodicalIF":2.6000,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ionics","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11581-024-05848-z","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) perovskite with good stability and high oxygen diffusion coefficient has been extensively studied as oxygen electrode in reversible solid oxide cells (RSOCs). Significant promotion of oxygen reaction kinetics of the LSCF oxygen electrode was achieved by the addition of Ca_xCo₄O_9+δ (CCOx, x = 3, 1.5) nano-catalysts in the present study. The La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ-Ca_1.5Co₄O_9+δ (LSCF-CCO1.5) electrode exhibited the optimal electrochemical property among the LSCF-based electrodes and the lowest polarization resistance (R_p) of 0.039 Ω·cm² was attained at 800 °C, which was ~ 97% lower than that of the LSFM electrode. Furthermore, the LSCF-CCO1.5 oxygen electrode also manifested excellent thermal cycling stability and alternating polarization durability. The hydrogen production rate of the LSCF-CCO1.5 electrolytic cell was 946 mL·cm⁻²·h⁻¹ at 1.5 V at 800 °C, which was 2.6 times higher than that of the LSCF cell (362 mL·cm⁻²·h⁻¹). The results certified the enhancement of electrochemical properties for LSCF oxygen electrode by the addition of CCOx nano-catalysts.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

CaxCo4O9+δ纳米催化剂增强La0.6Sr0.4Co0.2Fe0.8O3−δ氧电极的电化学性能

La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF)钙钛矿具有良好的稳定性和高氧扩散系数，作为可逆固体氧化物电池（rsoc）的氧电极得到了广泛的研究。在本研究中，CaxCo4O9+δ (CCOx, x = 3,1.5)纳米催化剂的加入显著促进了LSCF氧电极的氧反应动力学。在lscf基电极中，La0.6Sr0.4Co0.2Fe0.8O3−δ- ca1.5 co4o9 +δ (LSCF-CCO1.5)电极表现出最佳的电化学性能，在800℃时极化电阻（Rp）最低，为0.039 Ω·cm2，比LSFM电极低约97%。此外，LSCF-CCO1.5氧电极还表现出良好的热循环稳定性和交变极化耐久性。在800℃、1.5 V条件下，LSCF- cco1.5电解槽的产氢速率为946 mL·cm−2·h−1，是LSCF电解槽（362 mL·cm−2·h−1）的2.6倍。结果表明，CCOx纳米催化剂的加入提高了LSCF氧电极的电化学性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

文献相关原料

公司名称

产品信息

阿拉丁

Citric acid (CA)

阿拉丁

Fe(NO3)2·9H2O

阿拉丁

Co(NO3)2·6H2O

阿拉丁

La(NO3)3·6H2O

来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.