| Pd/NiAl_2O_4催化剂上甲烷燃烧反应的红外光谱研究 |
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| 引用本文： | 刘莹,王胜,高典楠,潘秋实,王树东. Pd/NiAl_2O_4催化剂上甲烷燃烧反应的红外光谱研究[J]. 催化学报, 2012, 0(9): 1552-1557 |
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| 作者姓名： | 刘莹 王胜 高典楠 潘秋实 王树东 |
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| 作者单位： | 中国科学院大连化学物理研究所;中国科学院研究生院 |
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| 摘 要： | 采用原位红外光谱研究了Pd/NiAl2O4催化剂上甲烷燃烧反应机理,考察了Pd在载体上的氧化-还原状态对催化剂性能的影响.结果表明,甲酸盐向碳酸盐的转化是反应的控制步骤.经预还原处理的催化剂在贫燃富氧条件下反应一段时间后,活性组分仍为Pd-PdO混合形态;Pd单质的存在使O2在其上吸附形成活性O2-物种,从而促进了甲酸盐向碳酸盐的转化.
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| 关 键 词： | 钯 镍铝尖晶石 甲烷 催化燃烧 原位红外 |
In-Situ FT-IR Study on Methane Combustion over Pd/NiAl2O4 Catalyst |
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| LIU Ying,WANG Sheng,GAO Diannan,PAN Qiushi,WANG Shudong. In-Situ FT-IR Study on Methane Combustion over Pd/NiAl2O4 Catalyst[J]. Chinese Journal of Catalysis, 2012, 0(9): 1552-1557 |
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| Authors: | LIU Ying WANG Sheng GAO Diannan PAN Qiushi WANG Shudong |
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| Affiliation: | 1,1 Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China |
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| Abstract: | The mechanism of methane combustion on Pd/NiAl2O4 catalyst was studied by in-situ FT-IR spectroscopy.The results showed that the transformation from formate to carbonate was the rate-determining step for the reaction.After reaction under lean fuel condition,the active site of pre-reduced catalyst was still Pd-PdO mixed phase.The existence of metal Pd would convert O2 to O2-species,which would facilitate the transformation from formate to carbonate. |
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| Keywords: | palladium nickel aluminum spinel methane catalytic combustion in-situ infrared spectroscopy |
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