Pd/Co3O4纳米颗粒负载于Al2O3纳米片高效催化甲烷燃烧

引用本文: 刘敬伟, 杨娜婷, 祝艳. Pd/Co₃O₄纳米颗粒负载于Al₂O₃纳米片高效催化甲烷燃烧[J]. 物理化学学报, 2017, 33(7): 1453-1461. doi: 10.3866/PKU.WHXB201704104 shu

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纳米颗粒负载于Al₂O₃纳米片高效催化甲烷燃烧

中国科学院上海高等研究院, 低碳转化科学与工程中国科学院重点实验室, 上海 201210
基金项目:
国家自然科学基金（21273151）和英国能源化学研究所研究基金资助项目

摘要: 我们报道了一种Pd/Co₃O₄纳米颗粒负载于Al₂O₃纳米片的三元催化剂催化甲烷的高效燃烧。其中，Pd/Co₃O₄负载于碱性氧化铝的复合材料活化甲烷C-H键的能力比SiO₂、ZrO₂和CeO₂以及酸性和中性Al₂O₃为载体时更强，这是因为Pd/Co₃O₄/碱性Al₂O₃拥有更多的氧空穴和吸附氧，对催化剂催化甲烷燃烧有较好的影响。尽管在5%（体积分数）的水蒸气存在下，其催化性能有一定的失活，但在移除水蒸气时，其催化性能可以快速恢复至最佳状态。在模拟真实汽车尾气的氛围下，Pd/Co₃O₄/碱性Al₂O₃依然具有较好的催化甲烷燃烧性能，在400℃时可以催化甲烷完全转化。

关键词:

Pd/Co₃O₄
/ 碱性
/ 甲烷氧化
/ 活性
/ 稳定性

English

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: 06 February 2017
Revised Date: 28 March 2017
Available Online: 10 April 2017
Fund Project:
The project was supported by the National Natural Science Foundation of China (21273151) and Energy Technologies Institute LLP, England.

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:

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1.
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Pd/Co₃O₄纳米颗粒负载于Al₂O₃纳米片高效催化甲烷燃烧

English

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

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