Dry reforming of methane (DRM) on Ni-based catalysts provides an economically and environmentally pivotal route to generate synthesis gas. However, coke formation on Ni surface by the growth of carbon atoms is the main reason for catalyst deactivation and reactor blockage. Here, we propose a reaction-induced method to incorporate and store active carbon atoms into nickel octahedral sites in core-shell Ni₃ZnC_0.7/Al₂O₃. This strategy can fundamentally avoid C−C bond formation and feasible oxidation of Ni₃ZnC_0.7 in low-temperature DRM under CO₂-rich condition. About 2 nm of thin-layer Al₂O₃ encapsulated Ni₃ZnC_0.7 is explored as the carbon reservoir to accommodate sufficient interstitial carbon atoms, and less than 5% Ni₃Zn was observed under CH₄/CO₂ < 1/1 for 100 h. The dynamic balance of carbon atom storage and conversion in robust Ni₃ZnC_0.7 contributes to the enhanced activity, stability, coke and oxidation resistance, and distinct reaction pathway in low-temperature DRM.

在镍基催化剂上干法重整甲烷 (DRM) 为生产合成气提供了一种经济和环保的关键途径。然而，碳原子生长在镍表面形成焦炭是催化剂失活和反应器堵塞的主要原因。在这里，我们提出了一种反应诱导的方法，将活性碳原子结合并储存到核壳 Ni ₃ ZnC _0.7 /Al ₂ O ₃的镍八面体位点中。该策略可以从根本上避免在富CO ₂条件下在低温DRM中Ni ₃ ZnC _0.7的CC键形成和可行的氧化。约 2 nm 的薄层 Al ₂ O ₃封装 Ni₃ ZnC _0.7被探索作为碳储层以容纳足够的间隙碳原子，并且在CH ₄ /CO ₂ < 1/1 100 h下观察到小于5%的Ni _{3 Zn。稳健的 Ni 3} ZnC _0.7中碳原子存储和转化的动态平衡有助于提高低温 DRM 中的活性、稳定性、抗焦化和抗氧化性以及独特的反应途径。