| 载体对Au-Pd催化剂甲醇部分氧化性能的影响 |
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| 引用本文： | 陈清波,罗来涛,王建鑫.载体对Au-Pd催化剂甲醇部分氧化性能的影响[J].化工学报,2008,59(4):898-903. |
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| 作者姓名： | 陈清波 罗来涛 王建鑫 |
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| 作者单位： | 南昌大学应用化学研究所，江西 南昌 330031 |
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| 基金项目： | 高等学校博士学科点专项科研基金项目(20040403001)~~ |
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| 摘 要： | 采用沉积沉淀法制备了一系列Au-Pd双金属催化剂，研究了不同载体对Au-Pd双金属催化剂甲醇部分氧化性能的影响，并运用XRD、TPD和TPR等手段对催化剂进行了表征。结果表明，Au-Pd/CeO2催化剂中形成的AuxPdy合金和氧空穴较多，致使Au-Pd/CeO2催化剂的活性较高;CeO2-TiO2和CeO2-ZrO2复合载体较大的比表面积和固溶体的形成有利于H2选择性的提高;Au-Pd/CeO2-ZrO2和Au-Pd/CeO2-TiO2催化剂有较高H2产率的主要原因是H2选择性的提高。
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| 关 键 词： | Au-Pd催化剂 甲醇部分氧化 复合载体 制氢 沉积沉淀 |
| 文章编号： | 0438-1157(2008)04-0898-06 |
| 收稿时间： | 2007-8-14 |
| 修稿时间： | 2007年8月14日 |
Effect of supports on activity of Au-Pd catalysts for partial oxidation of methanol |
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| CHEN Qingbo,LUO Laitao,WANG Jianxin.Effect of supports on activity of Au-Pd catalysts for partial oxidation of methanol[J].Journal of Chemical Industry and Engineering(China),2008,59(4):898-903. |
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| Authors: | CHEN Qingbo LUO Laitao WANG Jianxin |
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| Abstract: | Au-Pd catalysts were prepared by the deposition-precipitation method, and their activities for partial oxidation of methanol were evaluated. XRD, TPR and TPD were used to characterize the catalysts.In comparison to Au-Pd/CeO2-ZrO2 and Au-Pd/CeO2-TiO2 catalysts, the activity of Au-Pd/CeO2 catalyst for partial oxidation of methanol was higher, which can be related to the formation of more AuxPdy alloy and more oxygen vacancies.The hydrogen selectivity of Au-Pd/CeO2 was improved by using additional support (ZrO2 or TiO2), probably due to a combination of different factors, such as increasing active surface area and dispersion.A higher hydrogen yield was found for Au-Pd/CeO2-ZrO2 and Au-Pd/CeO2-TiO2 catalysts because of their higher hydrogen selectivity. |
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| Keywords: | Au-Pd catalyst partial oxidation of methanol composite support hydrogen generation deposition-precipitation |
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