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Oxygen storage capacity and thermal stability of brownmillerite-type Ca2(Al1-xGax)MnO5+δ oxides
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dc.contributor.author | Huang, Xiubing | |
dc.contributor.author | Ni, Chengsheng | |
dc.contributor.author | Irvine, John T. S. | |
dc.date.accessioned | 2020-08-13T23:36:43Z | |
dc.date.available | 2020-08-13T23:36:43Z | |
dc.date.issued | 2019-11-25 | |
dc.identifier | 260598444 | |
dc.identifier | fcef1162-0fac-41f3-9c46-b9efe339530f | |
dc.identifier | 85071023353 | |
dc.identifier | 000486596000040 | |
dc.identifier.citation | Huang , X , Ni , C & Irvine , J T S 2019 , ' Oxygen storage capacity and thermal stability of brownmillerite-type Ca 2 (Al 1-x Ga x )MnO 5+δ oxides ' , Journal of Alloys and Compounds , vol. 810 , 151865 . https://doi.org/10.1016/j.jallcom.2019.151865 | en |
dc.identifier.issn | 0925-8388 | |
dc.identifier.other | RIS: urn:7F0384349001125F4D7C1B1B9D86E892 | |
dc.identifier.other | ORCID: /0000-0002-8394-3359/work/68280811 | |
dc.identifier.uri | https://hdl.handle.net/10023/20462 | |
dc.description | The authors gratefully thank the National Natural Science Foundation of China (No. 51802015), and the Engineering and Physical Sciences Research Council platform grant (EP/I022570/1 and EP/I022570/2) for financial support. | en |
dc.description.abstract | Understanding the oxygen uptake/release mechanism in oxygen storage materials is of great importance in the design of energy-related materials and their corresponding applications. In this work, the effects of Ga doping amount on the oxygen storage capacity and thermal stability of Ca2(Al1-xGax)MnO5+δ (0 ≤ x ≤ 1) with a brownmillerite-type structure were investigated. Ca2AlMnO5+δ can reversibly store/release a large amount of excess oxygen (∼3.0 wt%) at low temperature (between 300 and 600 °C) under oxidative atmospheres. With the increasing Ga doping amount in Ca2(Al1-xGax)MnO5+δ, these materials uptake less oxygen at higher temperature which can be attributed to the difficulty in the oxidation of tetrahedral GaO4 blocks into octahedral GaO6 blocks under 1 atm O2. However, with the increasing of Ga-substitution amount, these Ca2(Al1-xGax)MnO5+δ (0 ≤ x < 1) can start to uptake oxygen at lower temperatures during the cooling process under flowing O2 due to the distorted structure. The results demonstrated that Ca2(Al1-xGax)MnO5+δ (0 ≤ x < 1) can reversibly store/release large amounts of oxygen via just controlling the surrounding temperature and/or oxygen partial pressure but without using reductive gases, which would enable them great potentials in many applications. | |
dc.format.extent | 1693001 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Alloys and Compounds | en |
dc.subject | Oxygen storage materials | en |
dc.subject | Brownmillerite-type structure | en |
dc.subject | Doping effect | en |
dc.subject | Reversible behaviour | en |
dc.subject | QD Chemistry | en |
dc.subject | NDAS | en |
dc.subject.lcc | QD | en |
dc.title | Oxygen storage capacity and thermal stability of brownmillerite-type Ca2(Al1-xGax)MnO5+δ oxides | en |
dc.type | Journal article | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.institution | University of St Andrews. Centre for Designer Quantum Materials | en |
dc.contributor.institution | University of St Andrews. School of Chemistry | en |
dc.contributor.institution | University of St Andrews. EaSTCHEM | en |
dc.identifier.doi | 10.1016/j.jallcom.2019.151865 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2020-08-14 | |
dc.identifier.grantnumber | EP/I022570/1 | en |
dc.identifier.grantnumber | EP/I022570/1 | en |
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