| CeO2分散度对Au/CeO2-SiO2催化剂上甲醛的催化氧化影响 |
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| 引用本文： | 张娜,罗孟飞,鲁继青.CeO2分散度对Au/CeO2-SiO2催化剂上甲醛的催化氧化影响[J].中国稀土学报,2011,29(6). |
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| 作者姓名： | 张娜 罗孟飞 鲁继青 |
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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321000 |
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| 摘 要： | 采用浸渍法在高比表面积的SiO2上负载不同量的CeO2,得到了CeO2不同颗粒尺寸的CeO2-SiO2载体,并用沉积沉淀法制备了CeO2-SiO2负载的纳米金催化剂.通过元素分析、X射线衍射、程序升温还原、N2物理吸附、拉曼光谱和透射电镜等技术对催化剂进行了表征,并考察了催化甲醛氧化活性.结果表明,高分散度、小尺寸的CeO2有利于得到较小尺寸的Au颗粒,并增强了催化剂的还原能力和氧缺位浓度,从而有利于提高催化剂低温甲醛催化氧化活性.
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| 关 键 词： | Au/CeO2催化剂 载体分散度 甲醛 催化氧化 稀土 |
Effect of CeO2 Dispersion on Catalytic Oxidation of Formaldehyde over Au/CeO2-SiO2 Catalysts |
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| Zhang Na,Luo Mengfei,Lu Jiqing.Effect of CeO2 Dispersion on Catalytic Oxidation of Formaldehyde over Au/CeO2-SiO2 Catalysts[J].Journal of the Chinese Rare Earth Society,2011,29(6). |
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| Authors: | Zhang Na Luo Mengfei Lu Jiqing |
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| Institution: | Zhang Na,Luo Mengfei,Lu Jiqing(Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,Institute of Physical Chemistry,Zhejiang Normal University,Jinhua 321004,China) |
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| Abstract: | A series of SiO2 supports with different particle sizes of CeO2 were prepared using an impregnation method,and the CeO2-SiO2 supported gold catalysts were prepared by a deposition-precipitation method.The catalysts were characterized by inductively coupled plasma,X-ray diffraction,temperature-programmed reduction,N2 adsorption,Raman spectroscopy,and transmission electron microscopy techniques.These catalysts were tested for catalytic oxidation of formaldehyde.The results showed that the high dispersion and ... |
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| Keywords: | Au/CeO2 catalyst dispersion of supports formaldehyde catalytic oxidation rare earths |
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