标题： 镧系元素对掺钛双相膜结构和氧渗透性的影响 显示英文标题

标题： Effects of Lanthanides on the Structure and Oxygen Permeability of Ti-doped Dual-phase Membranes

摘要： 氧气渗透性和氧传输膜（OTMs）稳定性之间的权衡效应仍然存在于含有CO2的工作气氛中。 在此，我们报道了一种新的系列60 wt%Ce0.9Ln0.1O2-{\delta }-40wt%Ln0.6Sr0.4Fe0.9Ti0.1O3-{\delta } (CLnO-LnSFTO, Ln = La, Pr, Nd, Sm, Gd, Tb) 双相OTMs，这是基于报道的高稳定性的Ti掺杂CPrO-PrSFTO选择不同的Ln元素而得到的。 系统地研究了不同Ln元素对Ti掺杂双相OTMs结构和氧气渗透性的影响。 基本上，随着Ln元素的原子序数增加，萤石相和钙钛矿相的晶胞参数都会变小。 钙钛矿相的晶胞体积和空间对称性降低，导致氧气渗透性降低。 最优的CLaO-LaSFTO在1000 oC下分别用He和CO2吹扫时，JO2分别为0.60和0.54 mL min-1 cm-2。 此外，所有CLnO-LnSFTO OTMs在CO2气氛中可以工作超过100小时，且性能没有明显退化，保持了优异的稳定性。 这项工作探索了用于CO2捕获和氧气分离的候选OTM材料，并为解决权衡效应提供了一些思路。 显示英文摘要

摘要： The trade-off effect of the oxygen permeability and stability of oxygen transport membranes (OTMs) still exists in working atmospheres containing CO2. Herein, we reported a new series of 60 wt%Ce0.9Ln0.1O2-{\delta}-40wt%Ln0.6Sr0.4Fe0.9Ti0.1O3-{\delta} (CLnO-LnSFTO, Ln = La, Pr, Nd, Sm, Gd, Tb) dual-phase OTMs by selecting different Ln elements based on the reported highly stable Ti-doped CPrO-PrSFTO. The effects of different Ln elements on the structure and oxygen permeability of Ti-doped dual-phase OTMs were systematically studied. Basically, as the atomic number of Ln elements increases, the unit cell parameters of both the fluorite phase and the perovskite phase become smaller. The unit cell volume and spatial symmetry of the perovskite phase are reduced, resulting in a reduction in oxygen permeability. The optimal CLaO-LaSFTO showed JO2 of 0.60 and 0.54 mL min-1 cm-2 with He and CO2 sweeping at 1000 oC, respectively. In addition, all CLnO-LnSFTO OTMs could work for more than 100 hours with no significant performance degradation in a CO2 atmosphere, maintaining excellent stability. This work explores candidate OTM materials for CO2 capture and oxygen separation, as well as provides some ideas for addressing the trade-off effect.