【摘 要】
：
Sr-substituted ABO3 perovskite oxides such as La0.6Sr0.4MnO3-δ (LSM) and La0.6Sr0.4FeO3-δ (LSF) are widely used as oxygen electrode materials in solid oxide c
【机 构】
：
Department of Molten Salt Chemistry and Engineering, Key Laboratory of Interfacial Physics and Techn
论文部分内容阅读
Sr-substituted ABO3 perovskite oxides such as La0.6Sr0.4MnO3-δ (LSM) and La0.6Sr0.4FeO3-δ (LSF) are widely used as oxygen electrode materials in solid oxide cells.The substituted Sr is not adequately stable under the operating conditions,because of the surface segregation of Sr.Herein,we focused on investigating the relationship between the local geometric structure due to Sr substitution and stability of LSM and LSF.We characterized the local geometric structure of Sr atoms via X-ray absorption spectroscopy.A greater Debye-Waller factor and a longer bond length of both the second and third Sr-O shells were observed in LSF,which demonstrates that LSF has a higher local structural disorder and that Sr in LSF requires less energy to segregate.After 20 h of heat treatment in the presence of a Fe-Cr alloy interconnect,the Sr/La molar ratio on LSF was observed to be much larger than that on LSM.This result unequivocally suggests that Sr in LSF is not as stable as in LSM,and the reaction between Sr and Cr accelerates the Sr surface segregation in LSF.
其他文献
实施“五项制度”，精准施策精准帮教。一是实施贫困家庭学生入学报告制度，二是实施结对帮扶制度，三是实施贫困学生成长报告制度，在读学校每学期对贫困学生学习、生活等情况进行评价，及时发现问题，及时解决问题，促进贫困学生健康成长。四是实施贫困生家访制度，每学年对贫困家庭学生开展至少2次家访活动。五是实施贫困生巩固率升学率实名考核制度，对全市各学校贫困生巩固率、升学率等指标进行实名考核，对优秀学校的校长和结
Fourier-transform infrared (FTIR) spectroscopy has emerged as a viable alteative to biochemical and molecular biology techniques for bacterial typing with advan
石泉县按照“精准帮扶、因人施策、全程关注、全面落实”的原则，采取了四大措施为贫困生安心就学提供保障。 贫困家庭学生资助力度不断加大。该县认真落实省市从学前到高中的各类教育资助政策，2017年春季学期共发放各类贫困学生补助资金334.9万元。其中按每生每年750元的标准，为1520名贫困幼儿发放生活补助57万元；按小学每生每年1000元、初中1250元補助标准落实贫困寄宿生生活补助，分别为1268
陕西省紫阳县是国定贫困县，也是劳动力输出大县。年均10万余人外出务工，因缺技术，大多从事苦、累、重、脏且收入低的工作。2014年以来，紫阳县大力发展职业教育，围绕“村村有致富产业，家家有致富门路，人人有致富技能”的目标，把免费职业技能培训作为帮助贫困户增收脱贫最快捷、最有效的手段与途径，形成了以修脚足疗培训为核心、以政企合作为基础、以定向输出为保障、以部门联动为支撑的免费职业技能培训工作新机制，“
2005年1月16日,“地产年度风云榜”再上层楼,成为中国地产业有史以来气势最为磅礴的一次盛会:2000余位地产老总到场,15000亿资金掌控者共聚人民大会堂,会上“北京市工商联房
The critical size of a finite homogenous slab is investigated for one-speed neutrons using the alteative phase function (AG,Anli-Güng(o)r) in place of the scat
A liquid metal reactor (LMR) loaded with a fuel compound of uranium and beryllium (U-Be alloy fuel),which was cooled by a lead-bismuth eutectic alloy (PbBi),has
A novel amidoxime-based fibrous adsorbent,denoted as PE/PP-g-(PAAc-co-PAO),was prepared by preirradiation grafting of acrylic acid and acrylonitrile onto polyet
新华锦龙邸项目,是目前西海岸唯一一个中式景观园林社区。或许是新华锦品牌的力量,或许是该楼盘本身的吸引力,或许是桥隧即将开通的交通利好,或许是该楼盘的区位优势,或许是
今年以来，山阳县4300余名教师与13510名贫困、残疾学生建立起了结对帮扶关系，以学校、幼儿园为单位，以建档立卡贫困户子女为对象，以校长、园长和全体教师为主体，通过教师+学生的帮扶模式，确保每一名建档立卡贫困户子女都有一名教师结对帮扶，全面提高育人质量；通过建立国家资助政策+县教育扶贫专项资助的“1+1”资金保障机制，使建档立卡贫困户子女生活实际困难和就学负担得到切实解决，围绕每个贫困学生、困难