甲烷化
纳米棒
煅烧
催化作用
热液循环
X射线光电子能谱
化学工程
热稳定性
降水
分解
初湿浸渍
化学
材料科学
色散(光学)
热分解
金属
纳米技术
冶金
有机化学
工程类
物理
光学
气象学
选择性
作者
Jiugang Hu,Xueying Wen,Siyuan Yin,Yixin Zhang,Caie Wu,Li Xu,Jian Qiu,Xun Hu,Leilei Xu,Mindong Chen
标识
DOI:10.1016/j.jiec.2023.07.046
摘要
In this work, the La(OH)3 nanorods were successfully synthesized by precisely regulating the parameters of the hydrothermal method. Then, a series of Ni-based CO2 methanation catalysts were fabricated via the incipient-wetness impregnation and deposition–precipitation methods by employing the La(OH)3 nanorods as the supports. The influences of the support morphology and the preparation method on the metal-support interaction, Ni dispersion, and the surface basicity were carefully investigated based on various techniques, such as XRD, SEM, H2-TPR, CO2-TPD, XPS, ect. It was found that the rod-shaped La(OH)3 supported catalyst prepared by the deposition–precipitation method performed the optimum activity and stability. The reason for this could be derived from the confinement effect of the crystal plane of the rod-shaped support, which would promote the formation of the strong metal-support interaction and the construction of the Ni-La interface with high activity. Furthermore, the online-tandem TG-MS and in-situ DRIFTS technologies were used to investigate the thermal decomposition performance of the catalyst precursors in the calcination process and the reaction intermediates of the CO2 methanation. Therefore, the fundamental roles of support morphology and catalyst preparation method were expected to direct the advancement of the Ni-based nanostructured catalysts with outstanding low-temperature performances.
科研通智能强力驱动
Strongly Powered by AbleSci AI