论文部分内容阅读
还原后的金属催化剂可因检修、再生、操作失误等原因而发生空气氛重氧化。关于金属催化材料新鲜还原态的X射线光电子能谱文献很多,而关于金属催化材料还原后发生空气氛重氧化的XPS文献则很少。使用三种不同合成路线制备了铝酸锌尖晶石型载钴催化剂,在还原后执行了室温下的空气氛重氧化,并开展了钴、锌、铝、氧元素的XPS分析及CO加氢活性考察。合成路线对催化材料的体相结构组成以及表面物相均能够产生相当的影响。XPS和X射线衍射技术的联用有助于催化材料的筛选。
Reduced metal catalyst due to overhaul, regeneration, operating errors and other causes of atmospheric oxidation. X-ray photoelectron spectroscopy (XPS) spectra of freshly reduced metal catalytic materials are abundant, and few reports of XPS on the atmospheric oxidation of metal catalyzed materials are available. Zinc aluminate spinel cobalt supported catalysts were prepared by three different synthesis routes. Atmospheric oxidation at room temperature was performed after reduction and XPS analysis of cobalt, zinc, aluminum and oxygen and CO hydrogenation Activity investigation. The synthesis route can have a considerable influence on the bulk composition and surface phase of the catalytic material. The combination of XPS and X-ray diffraction techniques facilitates the screening of catalytic materials.