This work objective is to reveal the advantages of the 10 wt%Co/AlO catalyst that the Co surface was constructed through the impregnation associated with the 6 h of ammonia vapor diffusion (10Co(T)/AlO). The modified surface catalyst was characterized and tested for CO reforming of methane reaction (CRM) that converts two main greenhouse gases into H fuel and syngas. Compared with the 10 wt%Co/AlO catalyst that the Co surface formed by traditional impregnation (10Co/AlO), the characterization outcome examined the creation of high-dispersive Co species on the modified surface catalyst. The dispersion of cobalt oxide derived by this method provided more Co/Co on the surface, collaborated with the stronger metal-support interaction, which generates more oxygen vacancies. Consequently, this modified Co surface on 10 wt%Co/AlO catalyst demonstrated higher activities and prevented the deposition of the hardest removable coke type during the CRM reaction time-on-stream. Overall, the Co surface of 10 wt%Co/AlO catalyst prepared by impregnation associated with the 6 h of ammonia vapor diffusion had formed a high dispersion of small Co/Co connecting with the support that developed abilities of Co/AlO catalyst into a more practical CRM catalyst.

中文翻译：

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Co/Al2O3表面改性对甲烷CO2重整性能及催化性能的影响

本工作目标是揭示 10 wt%Co/Al2O3 催化剂的优点，即通过与 6 小时氨蒸气扩散相关的浸渍构建 Co 表面 (10Co(T)/Al2O3)。对改性表面催化剂进行了表征并测试了甲烷 CO 重整反应 (CRM)，该反应将两种主要温室气体转化为 H 燃料和合成气。与传统浸渍形成的 Co 表面 (10Co/Al2O) 的 10 wt% Co/Al2O 催化剂相比，表征结果检查了改性表面催化剂上高分散 Co 物种的产生。通过这种方法得到的氧化钴分散体在表面提供了更多的Co/Co，与更强的金属-载体相互作用相配合，产生了更多的氧空位。因此，10 wt% Co/Al2O3 催化剂上的这种改性 Co 表面表现出更高的活性，并防止了 CRM 反应运行期间最难去除的焦炭类型的沉积。总体而言，通过浸渍和 6 小时的氨蒸气扩散制备的 10 wt% Co/Al2O3 催化剂的 Co 表面形成了与载体连接的小 Co/Co 的高分散性，从而将 Co/Al2O3 催化剂的性能提高到了更高的性能。实用的 CRM 催化剂。