中文摘要：

对Na Y分子筛进行Ce4＋交换改性,获得Ce Na Y载体,继而负载Au制备一系列Au/Ce Na Y催化剂。采用电感耦合等离子光谱分析仪（ICP-OES）、N2物理吸附仪、X线衍射仪（XRD）、高分辨透射电子显微镜（HRTEM）和H2程序升温还原（H2-TPR）等方法对负载纳米Au催化剂进行表征,并考察催化剂的水汽变换反应活性。结果表明：随着载体中Ce4＋含量增加,催化剂的Au负载量逐渐提高,比表面积和孔容显著下降,且纳米Au颗粒均匀地分散于分子筛载体上。Au/Ce Na Y比Au/Na Y具有更高的水汽变换反应活性,且Au/Ce Na Y催化剂的反应活性随载体中的Ce4＋含量的增加而提高。在350℃时,Au/Na Y的反应活性为2.6 mol/（mol·h）,而Au/Ce Na Y的反应活性高达33.2 mol/（mol·h）。

英文摘要：

Na Y zeolite was modified by Ce4 ＋exchange to obtain Ce Na Y support,which was further used to prepare Au/Ce Na Y catalysts. The catalysts were characterized by inductively coupled plasma optical emission spectrometry（ ICP-OES）,N2 adsorption,X-ray diffraction（ XRD）,high resolution transmission electron microscopy（ HRTEM） and H2 temperature programmed reduction（ H2-TPR）. The water-gasshift reaction（ WGSR） activity was tested for the catalysts. Results showed that the amount of Au loaded on the catalysts increased with the content of Ce4 ＋in the supports,while surface area and micropore volume of the catalysts reduced significantly. Au nanoparticles were evenly dispersed on Na Y or Ce Na Y zeolite. The activity of Au/Na Y was 2. 6 mol /（ mol ·h） while Au/Ce Na Y was 33. 2 mol /（ mol ·h） at350 ℃,thus,it indicated that Au/Ce Na Y catalysts had higher activity than Au/Na Y and their activities were improved with the increase of Ce4 ＋content in the support.