| OMS-2 的制备及其负载 PdO 对 CO 氧化的催化活性 |
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| 引用本文： | 刘雪松,鲁继青,王晓霞,罗孟飞.OMS-2 的制备及其负载 PdO 对 CO 氧化的催化活性[J].催化学报,2010,31(2):181-185. |
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| 作者姓名： | 刘雪松 鲁继青 王晓霞 罗孟飞 |
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| 作者单位： | 浙江师范大学物理化学研究所先进催化材料省部共建教育部重点实验室,浙江金华,321004 |
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| 基金项目： | 国家自然科学基金(20473075) |
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| 摘 要： | 以 MnSO4 和 KMnO4 为前驱体, 采用回流法在酸性介质中合成了氧化锰八面体分子筛 (OMS-2). 以 OMS-2 为载体采用浸渍法制备了 PdO/OMS-2 催化剂, 并对催化剂进行了表征和 CO 氧化活性测试. 结果表明, OMS-2 为纳米棒结构, 是典型的隐钾锰矿 (cryptomelane) 结构. 当 PdO 负载量 ≤ 1.0% 时, PdO 以高分散的形式存在, 而更高负载量时形成 PdO 晶相. 当 PdO 负载量为 2.5% 时, PdO/OMS-2 催化剂上 CO 氧化反应活性最高, CO 完全转化温度为 80 oC. 催化剂中高分散的 PdO 和高价态的 Pd 物种是反应的活性中心.
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| 关 键 词： | 氧化锰八面体分子筛 氧化钯 负载型催化剂 一氧化碳 催化氧化 二氧化碳 |
| 收稿时间： | 2010-02-25 |
Preparation of Manganese Oxide Octahedral Molecular Sieve and Catalytic Activity of Its Supported PdO for CO Oxidation |
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| LIU Xuesong,LU Jiqing,WANG Xiaoxia,LUO Mengfei.Preparation of Manganese Oxide Octahedral Molecular Sieve and Catalytic Activity of Its Supported PdO for CO Oxidation[J].Chinese Journal of Catalysis,2010,31(2):181-185. |
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| Authors: | LIU Xuesong LU Jiqing WANG Xiaoxia LUO Mengfei |
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| Institution: | Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang, China |
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| Abstract: | A manganese oxide octahedral molecular sieve (OMS-2) was synthesized using MnSO4 and KMnO4 as precursors by a reflux method under acidic conditions. PdO supported on OMS-2 (PdO/OMS-2) was prepared and tested for CO oxidation. The results showed that the OMS-2 molecular sieve was in the form of nano-rods and had typical structure with cryptomelane. PdO was highly dispersed when the PdO loading was lower than 1.0%,while crystalline PdO formed at higher PdO loading. The 2.5%PdO/OMS-2 catalyst was most active f... |
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| Keywords: | manganese oxide octahedral molecular sieve palladium oxide supported catalyst carbon monoxide catalytic oxidation carbon dioxide |
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