Noble Metal-Free Ceria-Zirconia Solid Solutions Templated by Tobacco Materials for Catalytic Oxidation of CO
Noble Metal-Free Ceria-Zirconia Solid Solutions Templated by Tobacco Materials for Catalytic Oxidation of CO
复制标题
以烟草材料为模板的无贵金属氧化铈-氧化锆固溶体用于 CO 催化氧化
DOI：
10.3390/catal6090135
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发表时间：
2016
期刊：
影响因子：
3.9
通讯作者：
Yuan Fagui
中科院分区：
文献类型：
--
作者：
Zhu Donglai;Duan Deliang;Han Yi;He Jiao;He Yi;Chen Yongjuan;Zhang Wei;Yan Zhiyin;Wang Jiaqiang;Yuan Fagui
以烟叶、烟茎和烟丝为生物模板，合成了一系列CeO_2-ZO_2固溶体。用粉末X射线衍射仪(XRD)、氮气吸附/脱附测试、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等物理化学技术对合成的样品进行了表征。结果表明，模板的形貌在所得到的CeO2-ZrO2固溶体中得到了很好的复制。考察了CO在CeO_2-ZO_2固溶体上的催化氧化活性。以烟丝为模板剂的催化剂由于其特殊的形貌，在较低的温度下表现出比以烟叶和烟梗为模板剂或不以模板剂为模板剂的CeO_2-ZO_2固溶体更高的CO转化率。与掺有1.0wt%贵金属如铂、银和金的氧化铈-氧化锆固溶体相比，该催化剂的CO转化率甚至相似。这些结果突出了使用烟草作为生物模板的优势。
A series of ceria-zirconia solid solutions were synthesized using tobacco leaves, stems and stem-silks as biotemplates. A combination of physicochemical techniques such as powder X-ray diffraction (XRD), N2 adsorption/desorption measurement, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to characterize the as-synthesized samples. The results show that the morphologies of the templates were well replicated in the obtained ceria-zirconia solid solutions. Catalytic oxidation activities of CO over the ceria-zirconia solid solutions were then investigated. The catalyst templated by tobacco stem-silk exhibited higher conversion of CO at lower temperature than that of ceria-zirconia solid solutions templated by tobacco leaves and stems or without templates due to its special morphology. The catalyst even showed similar CO conversion when compared to ceria-zirconia solid solutions doped with 1.0 wt % noble metals such as Pt, Ag and Au. The results highlighted the advantages of using tobacco as biotemplate.