2021
DOI: 10.3390/pr9101767
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Effects of Bi Substitution on the Cobalt-Free 60wt.%Ce0.9Pr0.1O2−δ-40wt.%Pr0.6Sr0.4Fe1−xBixO3−δ Oxygen Transport Membranes

Abstract: The mixed ionic-electronic conducting (MIEC) oxygen transport membrane (OTM) can completely selectively penetrate oxygen theoretically and can be widely used in gas separation and oxygen-enriched combustion industries. In this paper, dual-phase MIEC OTMs doped with Bi are successfully prepared by a sol-gel method with high-temperature sintering, whose chemical formulas are 60wt.%Ce0.9Pr0.1O2−δ-40wt.%Pr0.6Sr0.4Fe1−xBixO3−δ (60CPO-40PSF1−xBxO, x = 0.01, 0.025, 0.05, 0.10, 0.15, 0.20). The dual-phase structure, e… Show more

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Cited by 4 publications
(2 citation statements)
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“…Oxides and solid solutions with the pyrochlore structure A 2 B 2 O 7 (or A 2 B 2 O 6 O’, where A and B are rare earth or transition elements) attracted a lot of attention as materials for many applications such as oxygen [ 1 , 2 , 3 , 4 ] and hydrogen [ 5 , 6 ] separation membranes, solid oxide fuel cell/electrolyzer electrolytes [ 1 , 7 , 8 , 9 ] and electrodes [ 8 , 10 , 11 ], catalysts for various transformation processes [ 12 , 13 ], pigments [ 14 , 15 ], etc. [ 16 , 17 , 18 ].…”
Section: Introductionmentioning
confidence: 99%
“…Oxides and solid solutions with the pyrochlore structure A 2 B 2 O 7 (or A 2 B 2 O 6 O’, where A and B are rare earth or transition elements) attracted a lot of attention as materials for many applications such as oxygen [ 1 , 2 , 3 , 4 ] and hydrogen [ 5 , 6 ] separation membranes, solid oxide fuel cell/electrolyzer electrolytes [ 1 , 7 , 8 , 9 ] and electrodes [ 8 , 10 , 11 ], catalysts for various transformation processes [ 12 , 13 ], pigments [ 14 , 15 ], etc. [ 16 , 17 , 18 ].…”
Section: Introductionmentioning
confidence: 99%
“…In general, they could be classified by their crystal structure. The three general crystal structures for the electronic or mixed ionic electronic conductor (MIEC) phases are simple perovskite, spinel, and Ruddlesden–Popper. , Among these, the most used materials present a perovskite crystal structure. In this context, these oxide structures can be MIEC or pure electronic semiconductors, but most of them comprise alkaline earth in the material and hence involve stability challenges under CO 2 atmospheres at mid-long times of operation. ,, Spinels are the second material class most used for the electronic phase in dual-phase membranes.…”
Section: Introductionmentioning
confidence: 99%