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題名 | TiO[feaf]/SiO[feaf]擔體鉑與銠觸媒之製備方法與CO/H[feaf]反應催化性質之研究=The Study of the Preparation of TiO[feaf]/SiO[feaf]Supported Platinum and Rhodium and the Reaction of CO Hydrogenation |
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作者 | 呂卦南; Lu, Kwa-nan; |
期刊 | 康寧學報 |
出版日期 | 19981200 |
卷期 | 1:1 1998.12[民87.12] |
頁次 | 頁187-200 |
分類號 | 346.01 |
語文 | chi |
關鍵詞 | 擔體; 鉑; 銠; 觸媒; TiO[feaf]/SiO[feaf]; |
中文摘要 | 本研究利用含浸法、初濕含浸法與加酯合成法等製備各種TiO�砥�SiO�砥A然後以 此為擔體,分別將鉑與銠金屬初濕含浸於其上,製備擔體金屬觸媒。 透過 X ﹣射線繞射圖 譜、定體積法氫吸附、穿透式電子顯微技術與一氧化碳吸附之紅外線光譜之鑑定,得知其金 屬分散度較以純 TiO �祟巹� SiO �祝偏慞擗完`與銠觸媒為優。特別是以含浸法製得之 TiO �砥� SiO �祝偏慞撽猁嚓膇t浸的鉑及銠觸媒, 測試一氧化碳氫化反應皆呈現相當高的活性 。 TiO �砥� SiO �祖滌牧磾捫n提高了金屬的分散度,增強金屬對一氧化碳的吸附量,以及 二氧化鈦與鉑、銠金屬間所存在的擔體金屬作用力應是促成活性提升的主因。此外,對於鉑 與銠擔體金屬觸媒在產物上的差異分布亦推測了可能的反應機構。 |
英文摘要 | The supports of TiO��/SiO�� were prepared by impregnation, incipient wetness impregnation and esterification. The supported Pt and Rh catalysts were prepared by incipient wetness impregnation of the oxide supports with aqueous solution of H �� PtCl ��.6H �� O and RhCl ��.3H �� O. The prepared catalysts exhibit fairly the small metal crystallites homogenously dispersed on the TiO �� /SiO �� surfaces; which was characterized by powder X-ray diffraction, volumetric H �� chemisorption, transmission electron microscopy and infrared spectroscopy of CO adsorption. Due to the higher surface area and the enhancement in CO and H �� adsorption properties, the support of impregnation exhibits higher catalytic activity for CO/H �� reactions as compared to the other methods. Also, the possible mechanisms of CO/H �� reaction were suggested. |
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