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Facile Synthesis of porous spherical La0.8Sr0.2Mn1-xCuxO3 (0 ≤ x ≤ 0.4) and nano-cubic La0.8Sr0.2MnO3 with high catalytic activity for CO

Abstract

A molten salt method has been adopted to prepare porous La0.8Sr0.2Mn1-xCuxO3 (0 ≤ x ≤ 0.4) (LSMC-X) microspheres and La0.8Sr0.2MnO3 (LSM) nano-cubes using spherical and cubic MnCO3 as template, respectively. XRD patterns showed a single perovskite phase when Cu content was less than 0.3. The images of SEM and TEM indicated that porous microspheres consist of many aggregated nanoparticles and nano-cubes were solid with smooth surface. LSM and LSMC-0.2 samples both possessed high surface area (63.5045 m²/g, 49.6504 m²/g). Furthermore, the results of CO conversion revealed that LSMC-0.2 owed the best catalytic activity (T50 = 83.63 °C, T90 = 97.40 °C) and good stability. XPS analysis confirmed that Cu2+ doping induced the formation of Mn4+ and slight changes of oxygen species, leading to different catalytic activity of catalysts. In view of the facile morphology synthesis and high catalytic performance, we hold that the porous spherical La0.8Sr0.2Mn1-xCuxO3 (0≤ x ≤ 0.4) and nano-cubic La0.8Sr0.2MnO3 catalysts are promising candidate materials for the CO oxidation.

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Publication details

The article was received on 16 Jun 2018, accepted on 07 Oct 2018 and first published on 09 Oct 2018


Article type: Paper
DOI: 10.1039/C8CE01000E
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Facile Synthesis of porous spherical La0.8Sr0.2Mn1-xCuxO3 (0 ≤ x ≤ 0.4) and nano-cubic La0.8Sr0.2MnO3 with high catalytic activity for CO

    X. Huang, H. pan, K. Chen, Z. Yin and J. Hong, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE01000E

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