In、Ta共掺杂Ni-BaCeO_(3)基氢分离膜  

In and Ta Co-doped Ni-BaCeO_(3)-based Hydrogen Separation Membranes

作　　者：杨春利[1,2] 黄江龙 杜晶[2] 陈喜 张浩[2] 王靖[2] YANG Chunli;HUANG Jianglong;DU Jing;CHEN Xi;ZHANG Hao;WANG Jing(State Key Laboratory of Green Building in Western,Xi’an University of Architecture&Technology,Xi’an 710055,China;Functional Materials Laboratory,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学西部绿色建筑国家重点实验室,西安710055 [2]西安建筑科技大学功能材料研究所,西安710055

出　　处：《材料导报》2023年第6期22-29,共8页Materials Reports

基　　金：西部绿色建筑国家重点实验室自主研究课题(LSZZ202020);陕西省自然科学基础研究计划项目(2021JQ-497);陕西省教育厅服务地方专项计划项目(20JC022);西安建筑科技大学自然科学专项项目(ZR20026)。

摘　　要：传统能源的短缺以及化石燃料直接燃烧后所产生的污染,促使人类必须探索新的可替代能源。氢气无毒、无污染、来源广泛,是第三次能源革命的重要媒介。工业制氢会产生CO、CO_(2)等副产物,故而提升氢气浓度,剔除这些杂质,是制氢必不可缺的环节。混合导电氢分离膜具有高效的氢分离能力,是应用在该环节的最佳选择之一。BaCeO_(3)是单相钙钛矿结构,在其“B”位掺杂后,质子导电能力提升,具备更佳的氢渗透性,但这类材料在湿润CO_(2)气氛中化学稳定性较差。合理的掺入其他离子以及添加金属相,能有效改善材料的氢渗透率或化学稳定性。本工作使用溶胶凝胶法制备了BaCe_(0.7)In_(0.1)Ta_(0.1)Y_(0.1)O_(3-δ)粉末材料,并与Ni粉混合共烧制备质子-电子混合导电金属陶瓷氢分离膜。通过XRD、SEM表征了样品的相结构和微观形貌,并测试了其电导率,氢渗透率,以及在湿润CO_(2)环境中的短期稳定性。结果表明,In^(3)+和Ta^(5+)共掺杂不仅改善了样品的烧结活性,并且提高了氢分离膜在湿润CO_(2)环境中的化学稳定性。The shortage of traditional energy and the pollution caused by the direct combustion of fossil fuels make it necessary to explore new alternative energy sources.Hydrogen,which is non-toxic,pollution-free and widely available,is therefore an important vehicle for the third energy revolution.Since CO,CO_(2)and other impurities will be produced in industrial hydrogen production,it is essential to improve the concentration of hydrogen and remove these impurities.Mixed conducting hydrogen separation membranes are one of the best choices for application in this process because of its high efficiency in hydrogen separation.By doping at the"B"site,the single-phase perovskite structure BaCeO_(3)has good ionic conductivity and high hydrogen permeability,but this kind of material has poor chemical stability in wet CO_(2)atmosphere,which can not meet the needs of practical application.In view of these problems,reasonable incorporation of other ions and metal phases can effectively improve hydrogen permeability or chemical stability.In this work,BaCe_(0.7)In_(0.1)Ta_(0.1)Y_(0.1)O_(3-δ)powder was prepared by sol-gel method,and then mixed with Ni powder to prepare proton-electron mixed conducting cermet hydrogen separation membrane.The phase structure and microstructure of the samples were characterized by XRD and SEM,respectively.Furthermore,the electrical conductivity,hydrogen permeability,and short-term stability in wet CO_(2)environment were also tested.The results showed that The co-doping of In^(3+)and Ta^(5+)ions not only improved the sintering activity,but also improved the chemical stability of the hydrogen separation membrane in the wet CO_(2)environment.

关 键 词：质子-电子混合导电膜 稳定性 电导率 氢渗透率 

分 类 号：TQ028[化学工程]