Citation: LIU Jing-Wei, YANG Na-Ting, ZHU Yan. Pd/Co₃O₄ Nanoparticles Inlaid in Alkaline Al₂O₃ Nanosheets as an Efficient Catalyst for Catalytic Oxidation of Methane[J]. Acta Physico-Chimica Sinica, ;2017, 33(7): 1453-1461. doi: 10.3866/PKU.WHXB201704104 shu

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

CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, P. R. China

Received Date: 6 February 2017
Revised Date: 28 March 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (21273151) and Energy Technologies Institute LLP, England.

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℃.
- Pd/Co₃O₄,
- Alkaline Al₂O₃,
- Methane oxidation,
- Activity,
- Stability
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