Selective Oxidation of Carbon Monoxide Relative to Hydrogen Using Catalytically Active Gold
    5.
    发明申请
    Selective Oxidation of Carbon Monoxide Relative to Hydrogen Using Catalytically Active Gold 审中-公开
    使用催化活性金选择性氧化一氧化碳相对于氢

    公开(公告)号:US20090011293A1

    公开(公告)日:2009-01-08

    申请号:US12278328

    申请日:2007-02-13

    摘要: The present invention provides technology for controlling, or tuning, the catalytic activity of gold provided upon nanoporous supports such as those derived from nanoparticulate, crystalline titania. In some aspects of practice, the surface of nanoparticulate media incorporated into a catalyst system of the present invention is provided with chemical modifications of the surface that dramatically suppress the ability of the resultant catalyst system to oxidize hydrogen. Yet, the system still readily oxidizes CO. In other words, by selecting and/or altering the nanoparticulate surface via the principles of the present invention, PROX catalysts are readily made from materials including catalytically active gold and nanoparticulate media. Additionally, the nanoparticulate support also may be optionally thermally treated to further enhance selectivity for CO oxidation with respect to hydrogen. Such thermal treatments may occur before or after chemical modification, but desirably occur prior to depositing catalytically active gold onto the support incorporating the nanoparticles.

    摘要翻译: 本发明提供了用于控制或调节在纳米多孔载体上提供的金的催化活性的技术,例如衍生自纳米颗粒,结晶二氧化钛的金。 在实践的一些方面,纳入本发明的催化剂体系的纳米颗粒介质的表面具有显着抑制所得催化剂体系氧化氢的能力的表面的化学修饰。 然而,该系统仍然容易氧化CO。换句话说,通过根据本发明的原理选择和/或改变纳米颗粒表面,PROX催化剂容易地由包括催化活性金和纳米颗粒介质的材料制成。 另外,纳米颗粒载体也可以任选热处理以进一步提高对CO的CO氧化的选择性。 这种热处理可以在化学改性之前或之后进行,但是希望在催化活性金沉积到纳米颗粒的载体上之前进行。