Catalytic removal of diesel soot particulates over K and Mg substituted La1 − xKxCo1 − yMgyO3 perovskite oxides |
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| Affiliation: | 1. Department of Pharmacology, Federal University of São Paulo (UNIFESP), São Paulo, Brazil;2. Interdisciplinary Center for Gene Therapy, Federal University of São Paulo, São Paulo, Brazil;3. Department of Pharmacology, University of Oxford, Oxford, UK;4. Department of Cell and Developmental Biology, University College London, London, UK;1. School of Material Science and Engineering, Tsinghua University, Beijing 100084, PR China;2. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, PR China;1. Department of Chemistry, Faculty of Science and Engineering, Saga University, 1 Honjo-machi, Saga 840-8502, Japan;2. World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;3. Department of Nanoscience and Nanoengineering, Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan |
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| Abstract: | K and Mg substituted perovskite catalysts La1 − xKxCo1 − yMgyO3 (x = 0–0.4, y = 0–0.2) for soot combustion were prepared by citric acid complexation and characterized by XRD, FT-IR, SEM, TEM, EDS, H2-TPR, XPS and TG. Soot combustion was remarkably accelerated when K was introduced into LaCoO3. Then Mg was doped into the K substituted LaCoO3, soot combustion was further improved for the restrained growth of Co3O4 phase. K/Mg substitutions were responsible for enhancing activity of catalysts by improving reducibility as suggested by H2-TPR studies. Among all the catalysts, La0.6K0.4Co0.9Mg0.1O3 exhibited the highest activity. |
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