| 甲醇在CeO2担载Pd催化剂上分解机理的研究 |
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| 引用本文： | 杨成,董庆年,任杰,孙予罕.甲醇在CeO2担载Pd催化剂上分解机理的研究[J].高等学校化学学报,2002,23(12):2329-2331. |
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| 作者姓名： | 杨成 董庆年 任杰 孙予罕 |
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| 作者单位： | 中国科学院山西煤炭化学研究所, 煤转化国家重点实验室, 太原030001 |
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| 基金项目： | 国家自然科学基金，山西省青年基金，974609，991010，， |
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| 摘 要： | 采用原位红外(in-situFTIR)技术对甲醇在CeO2和Pd/CeO2催化剂上的吸附和反应进行了研究,提出一个新的甲醇分解反应机理模型.甲醇在CeO2上容易吸附并结合其晶格氧生成甲酸盐物种,而甲醇分解的产物氢被Pd活化后,溢流到CeO2上促进了甲酸盐物种的分解.Cl-的存在加强了Pd/CeO2催化剂与氢的相互作用,Pd和CeO2通过对氢和氧物种的作用对甲醇分解反应的过程表现出协同效应.
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| 关 键 词： | 甲醇分解 CeO2 Pd/CeO2 反应机理 |
| 文章编号： | 0251-0790(2002)12-2329-03 |
| 收稿时间： | 2002-01-10 |
Studies on Mechanism of Methanol Decomposition over Pd/CeO2 Catalyst |
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| YANG Cheng,DONG Qing-Nian,REN Jie,SUN Yu-Han.Studies on Mechanism of Methanol Decomposition over Pd/CeO2 Catalyst[J].Chemical Research In Chinese Universities,2002,23(12):2329-2331. |
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| Authors: | YANG Cheng DONG Qing-Nian REN Jie SUN Yu-Han |
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| Institution: | State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China |
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| Abstract: | The interaction between hydrogen and CeO 2 support and Pd/CeO 2 catalysts is characterized by TPR and H 2-TPD, while the adsorption and decomposition of methanol over CeO 2 and Pd/CeO 2 catalysts were studied by in-situ FTIR technique, then a new model of the mechanism for the methanol decomposition over Pd/CeO 2 catalyst was proposed. It was found that the lattice oxygen of CeO 2 was active towards oxidation of the adsorbed methanol to form formate species, which were then reduced by the hydrogen produced and activated on Pd. The anion Cl\+- promoted the interaction between hydrogen and Pd/CeO 2 catalyst, so a synergistic effect between Pd and CeO 2 was proved by their action of lattice oxygen and hydrogen. |
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| Keywords: | Methanol decomposition CeO 2 Pd/CeO 2 Reaction mechanism |
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