Pd/Co3O4纳米颗粒负载于Al2O3纳米片高效催化甲烷燃烧

doi:10.3866/PKU.WHXB201704104

Abstract

Abstract:

We report an efficient catalyst composed of ternary components prepared by inlaying Pd/Co₃O₄ nanoparticles in alkaline Al₂O₃ nanosheets for catalytic oxidation of methane. Pd/Co₃O₄ inlaid in alkaline Al₂O₃ exhibited a higher ability to break the C-H bond of methane than Pd/Co₃O₄ supported on SiO₂, ZrO₂, CeO₂, and acidic or neutral Al₂O₃. Our results show more oxygen vacancies and higher amounts of surface adsorbed oxygen on the surface of Pd/Co₃O₄/alkaline Al₂O₃ than on other catalysts, which is responsible for methane activation and conversion. Further, the Pd/Co₃O₄/alkaline Al₂O₃ catalyst can almost restore to its initial value in the absence of water when 5% (volume fraction) vapor water was cut off, although a decrease in activity occurred when water vapor was introduced to the reaction system. Even under a condition similar to the exhaust of a lean-burn natural gas engine, the catalytic performance of the Pd/Co₃O₄/alkaline Al₂O₃ catalyst is excellent, that is, methane could be completely converted when the sample temperature in the reaction atmosphere was ramped to 400℃.

Key words: Pd/Co₃O₄, Alkaline Al₂O₃, Methane oxidation, Activity, Stability

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Jing-Wei LIU,Na-Ting YANG,Yan ZHU. Pd/Co₃O₄ Nanoparticles Inlaid in Alkaline Al₂O₃ Nanosheets as an Efficient Catalyst for Catalytic Oxidation of Methane[J].Acta Phys. -Chim. Sin., 2017, 33(7): 1453-1461.

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Pd/Co₃O₄ Nanoparticles Inlaid in Alkaline Al₂O₃ Nanosheets as an Efficient Catalyst for Catalytic Oxidation of Methane

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