Aluminium substituted lanthanum based perovskite type oxides, non-stoichiometry and performance in methane partial oxidation by framework oxygen
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- 作者：Federica Mudua ; Unni Olsbyea ; c ; unni.olsbye@kjemi.uio.no" class="auth_mail" title="E-mail the corresponding author ; Bjø ; rnar Arstadb ; c ; Spyros Diplasa ; b ; Yanjun Lid ; Helmer Fjellvå ; ga ; c ; e
- 关键词：Perovskite oxide ; Synthesis gas ; Methane partial oxidation ; Reducible oxide
- 刊名：Applied Catalysis A: General
- 出版年：2016
- 出版时间：5 August 2016
- 年：2016
- 卷：523
- 期：Complete
- 页码：171-181
- 全文大小：2704 K
文摘
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Rh-promoted samples of La0.75Sr0.25(Fe0.80Co0.20)(1-x)AlxO3-δ (x = 0.10, 0.25, 0.40, 0.60) and La0.8Sr0.2Fe0.8Co0.2O3-δ were synthesized as single phase materials.
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Structural characterization by means of X-Ray and neutron powder diffraction revealed rhombohedral symmetry for all samples (space group R-3c). A decrease in unit cell size occurs on increasing Al-content.
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The Al-substitution alters the redox properties, as shown by flowing titrations.
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A correlation between the redox properties of the perovskite type oxide and the product evolution during reaction of the Rh-promoted oxides with CH4 was observed.
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The possibility of tuning the product evolution through the redox properties of the oxides (Al-substitution) was successfully demonstrated.