Methane dry reforming (DRM) is a fascinating reaction which can effectively utilize two abundant and greenhouse gases (CO₂ and CH₄) to prepare syngas (CO and H₂). The design and synthesis of high coking resistance Ni based catalysts are still a challenge. Herein, a perfect perovskite LaNiO₃ nano-cube was encapsulated in perpendicular mesoporous silica shell to form a novel core-shell structured catalyst (LaNiO₃[email protected]₂) for DRM reaction. The morphology of LaNiO₃[email protected]₂ retained well even after reduced at high temperature, and the effect of shell thickness on its catalytic performance was also studied in detail. It's found that the mesoporous silica shell has positively effects to improve the coking resistance of Ni/La₂O₃ (derived from LaNiO₃ nano-cube after reduction). When the shell thickness increased, the formation of coking deposition is decreased. The reasons for this novel core-shell structured catalyst with superior DRM performance should be attributed to the dual confinement effects. One is the strong metal-support interaction (SMSI) between Ni and La₂O₃ and silica, and the other is derived from the perpendicular mesoporous silica shell. The dual confinement strategy developed in this work can be used to design other high coking resistance catalysts for DRM reaction or other high temperature thermal catalysts.

甲烷干重整（DRM）是一种引人入胜的反应，可以有效地利用两种丰富的温室气体（CO ₂和CH ₄）来制备合成气（CO和H ₂）。高耐焦化镍基催化剂的设计和合成仍然是一个挑战。在此，将完美的钙钛矿型LaNiO ₃纳米立方体包封在垂直的介孔二氧化硅壳中，以形成用于DRM​​反应的新型核壳结构催化剂（LaNiO ₃ [email protected] ₂）。LaNiO ₃的形态[电子邮件保护] ₂即使在高温下还原后仍能保持良好的性能，并且还详细研究了壳厚度对其催化性能的影响。发现介孔二氧化硅壳对提高Ni / La ₂ O _3的抗结焦性有积极作用（还原后来源于LaNiO ₃纳米立方体）。当壳厚度增加时，焦炭沉积的形成减少。具有新颖的DRM性能的这种新颖的核-壳结构催化剂的原因应该归因于双重限制作用。一种是Ni和La ₂ O ₃之间的强金属-载体相互作用（SMSI）和二氧化硅，另一个来自垂直的介孔二氧化硅壳。在这项工作中开发的双重限制策略可用于设计其他用于DRM​​反应的高抗焦化催化剂或其他高温热催化剂。