Modulating the oxygen-metal interface that enables efficient and selective C–H activation remains challenging. Herein, we present a novel MoC_xO_y oxygen carrier for syngas production via the chemical looping CH₄–CO₂ reforming (CL-DRM) reaction. Molybdenum carbide additive induces the re-dispersion of Ni particles from Al₂O₃ surface to α-MoC driven by the strong interaction between Ni and α-MoC. A dynamic structure transformation between MoC_x and MoC_xO_y occurs and new Ni–MoC_xO_y interfaces form during the redox cycling, which is discovered to be crucial for the low-temperature CH₄ activation using surface construction experiments and in-situ spectroscopic methods. As a result, Ni–(α-MoC)/Al₂O₃ exhibits near 100% selectivity to syngas with a H₂/CO ratio of 2:1 at 500°C, which is a significantly lower temperature than that of conventional systems. This study first employs molybdenum carbide as an oxygen storage material (OSM) in CL-DRM reaction, paving the way of utilizing transition metal carbides as OSMs in chemical looping processes.

调节氧-金属界面以实现高效和选择性的 C-H 活化仍然具有挑战性。在此，我们提出了一种新型 MoC _x O _y氧载体，用于通过化学循环 CH ₄ –CO ₂重整 (CL-DRM) 反应生产合成气。_{在 Ni 和 α-MoC 之间的强相互作用的驱动下，碳化钼添加剂诱导 Ni 颗粒从 Al 2} O ₃表面重新分散到 α-MoC。_{MoC x}和 MoC _x O _y之间发生动态结构转变，新的 Ni–MoC _x O _y界面在氧化还原循环过程中形成，使用表面构造实验和原位光谱方法发现这对于低温 CH _{4活化至关重要。}因此，Ni–(α-MoC)/Al ₂ O _{3在 500°C 下对 H 2} /CO 比为 2:1 的合成气表现出接近 100% 的选择性，这明显低于传统系统的温度. 该研究首先在 CL-DRM 反应中采用碳化钼作为储氧材料 (OSM)，为在化学链过程中利用过渡金属碳化物作为 OSM 铺平了道路。