Mn离子掺杂Pr_(0.5)Ba_(0.5)Fe_(0.9)Mn_(0.1)O_(3-δ)钙钛矿SOEC阴极电解CO_(2)性能研究  

Performance Research of CO_(2)Electrolysis of Mn Doped Pr_(0.5)Ba_(0.5)Fe_(0.9)Mn_(0.1)O_(3-δ)Perovskite as SOEC Cathode

作　　者：唐江城 赵先兴 蔡润田 杨城昊 池波[1] TANG Jiangcheng;ZHAO Xianxing;CAI Runtian;YANG Chenghao;CHI Bo(School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Xin’ao Natural Gas Co.,Ltd.,Langfang 065000,Hebei,China)

机构地区：[1]华中科技大学材料科学与工程学院,武汉430074 [2]新奥天然气股份有限公司,河北廊坊065000

出　　处：《材料导报》2024年第8期18-23,共6页Materials Reports

基　　金：国家重点研发计划(2020YFB1506304)。

摘　　要：固体氧化物电解池(SOEC)电解CO_(2)时其阴极是CO_(2)还原反应发生的场所,也是SOEC取得高性能的关键环节。研究了Mn离子掺杂的Pr_(0.5)Ba_(0.5)Fe_(0.9)Mn_(0.1)O_(3-δ)(PBFM)钙钛矿材料作为SOEC阴极电解纯CO_(2)的性能。结果表明在850℃、1.8 V的电解电压下基于PBFM阴极的SOEC电流密度可达1.7 A·cm^(-2),较使用未掺杂的Pr_(0.5)Ba_(0.5)FeO_(3-δ)(PBF)阴极提升了约30%;同时,电池的极化阻抗下降约60%,电化学性能增长主要来源于掺杂后氧空位浓度的增加。在800℃、1.3 V恒压的条件下70 h的长期测试中,PBFM电池没有表现出明显的衰减,且长期测试后的电极没有积碳现象。研究证明PBFM是一种有前景的电解CO_(2)SOEC阴极材料。Cathode is the site where the CO_(2)reduction reaction occurs in solid oxide electrolysis cell(SOEC)for CO_(2)electrolysis,and it is also the key component for SOEC to achieve high performance.The electrochemical performance of Pr_(0.5)Ba_(0.5)Fe_(0.9)Mn_(0.1)O_(3-δ)(PBFM)perovskite as SOEC cathode catalyst to convert CO_(2)to CO was studied.The result shows that the cell based on PBFM cathode shows a higher current density of 1.7 A·cm^(-2)at applied 1.8 V voltage and 850℃.There is an approximately 30%performance improvement compared to the SOEC based on PBF cathode.Meanwhile,the polarization impedance has also decreased by about 60%.The increased current density originates from the improved oxygen vacancy.Furthermore,the cell with this active catalyst exhibits a stable CO_(2)electrolysis performance for 70 h operation at a stable voltage of 1.3 V at 800℃,and no carbon deposition is detected after the long-term test.The research suggests that PBFM can be a talented candidate as SOEC cathode for CO_(2)electrolysis.

关 键 词：固体氧化物电解池 CO_(2)电解 钙钛矿材料 阴极催化剂 金属离子掺杂 

分 类 号：TQ151[化学工程—电化学工业]