| 制备条件对Au/LaCoO_3催化氧化CO性能的影响 |
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| 引用本文： | 孟根图雅,贾美林,照日格图.制备条件对Au/LaCoO_3催化氧化CO性能的影响[J].分子催化,2009,23(5). |
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| 作者姓名： | 孟根图雅 贾美林 照日格图 |
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| 作者单位： | 内蒙古师范大学,化学与环境科学学院,内蒙古,呼和浩特,010022 |
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| 基金项目： | 教育部新世纪优秀人才支持计划，国家自然科学基金，内蒙古师范大学研究生科研创新基金 |
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| 摘 要： | 采用溶胶-凝胶法制备了钙钛矿型复合氧化物LaCoO_3, 并用沉积-沉淀法(DP法)制备了Au/LaCoO_3催化剂. 考察了制备条件对催化剂催化氧化CO活性的影响. 结果表明, 制备过程中, 溶液pH、 pH调节顺序及催化剂焙烧温度对催化剂活性均有一定影响. Au/LaCoO_3催化剂的最佳制备条件为: 沉积过程中在HAuCl4溶液中先加入载体后, 再调节溶液pH=8, 得到的催化剂经250 ℃焙烧后可提高催化剂稳定性.
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| 关 键 词： | Au/LaCoO_3催化剂 制备条件 CO催化氧化 |
Effect of Preparation Conditions on Au/LaCoO_3 Catalytic Performance for CO Oxidation |
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| Menggentuya,JIA Mei-lin,BAO Zhaorigetu.Effect of Preparation Conditions on Au/LaCoO_3 Catalytic Performance for CO Oxidation[J].Journal of Molecular Catalysis (China),2009,23(5). |
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| Authors: | Menggentuya JIA Mei-lin BAO Zhaorigetu |
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| Abstract: | Perovskite Oxide LaCoO_3 were prepared by sol-gel method, then Au/LaCoO_3 catalyst was prepared by deposition-precipitation method. The catalytic performance for CO low-temperature oxidation over this catalyst was investigated. The results showed the solution pH, the adjusting order of pH value and calcination temperature had different effect on catalyst activity. The optimal preparation condition for Au/LaCoO_3 is as following; the support was firstly added to the precursor solution HAuCl_4, then pH was adjusted to 8. Calcination at 250 ℃ decreased the activity while improved the stability of catalyst. |
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| Keywords: | Au/LaCoO_3 catalyst Preparation conditions Catalytic Oxidation of CO |
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