摘要
通过固体氧化物电解池(SOEC)将CO 2转化为有价值的化学物质,引起了人们的特别关注.但是,开发对CO 2的具有高化学吸附性和催化活性的阴极材料仍然是一大挑战.通过原位析出法构建的NiFe纳米颗粒修饰的Pr_(0.8)Sr_(1.2)(NiFe)O_(4-δ)(PSNF-NFA)固体氧化物电解池(SOEC)阴极材料用于直接CO 2电解.XRD和SEM分析证明,该NiFe合金析出时会导致基体发生相变,而且析出的纳米颗粒尺寸小且分布均匀.纳米颗粒和钙钛矿氧化物基体的界面具有丰富的氧空位,增强了CO 2的化学吸附和解离,显著提高了CO 2电解性能.该新型的复合阴极在800℃的温度和1.6 V的电压下,显示出高达2.5 A/cm 2的电流密度.此外,该PSNF-NFA阴极对直接CO 2电解也显示出良好的稳定性和抗积碳性.
In recent years,the conversion of CO 2 into valuable chemical substances through solid oxide electrolysis cells(SOEC)has attracted special attention.However,it is still a big challenge to develop cathode materials with high chemisorption and catalytic activity for CO 2.In this work,the NiFe nanoparticles modified Pr_(0.8)Sr_(1.2)(NiFe)O_(4-δ)(PSNF-NFA)cathode material constructed by the in-situ exsolution method was used for direct CO_(2) electrolysis.XRD and SEM analysis proved that the exsolution of the NiFe alloy will cause the matrix to undergo phase transformation,and the exsolved nanoparticles are abundant and uniformly distributed.The interface between the nanoparticles and the perovskite oxide matrix has abundant oxygen vacancies,which can enhance the chemical adsorption and dissociation of CO_(2),and significantly improve the performance of CO_(2) electrolysis.The new composite cathode shows a current density of 2.5 A/cm 2 at 800℃and 1.6 V.In addition,the PSNF-NFA cathode also shows good stability and coking resistance to direct CO_(2) electrolysis.
作者
谭婷
杨洪宇
覃铭霞
王子鸣
宋琛
刘太楷
刘敏
杨成浩
TAN Ting;YANG Hongyu;QIN Mingxia;WANG Ziming;SONG Chen;LIU Taikai;LIU Min;YANG Chenghao(School of Environment and Energy,South China University of Technology,Guangzhou 510006,China;The Key Lab of Guangdong for Modern Surface Engineering Technology,National Engineering Laboratory for Modern Materials Surface Engineering Technology,Institute of New Materials,Guangdong Academy of Sciences,Guangzhou 510650,China)
出处
《材料研究与应用》
CAS
2021年第2期111-117,共7页
Materials Research and Application
基金
国家重点研发计划(2018YFB1502603)
广东省应用型科技研发专项(2017B090916002).
