Dual–Interface Engineering of BO x –Ni and Ni–MgAl ₂ O ₄ for Durable Dry Reforming of Methane

Dry reforming of methane (DRM) provides a promising pathway for converting CH 4 and CO 2 into syngas (H 2 /CO), yet Ni‐based catalysts suffer from deactivation at high temperatures due to Ni sintering and carbon deposition. Herein, we designed a Ni/ MgAl 2 O 4 catalyst via a melt‐wetting (MW) process and further modified with boron nitride (BN) overlayer which is converted to boron oxide (BO x ) overlayer on Ni surface under CO 2 atmosphere. The resulting dual‐interface BO x /Ni/ MgAl 2 O 4 catalyst exhibited long‐term stability, maintaining CH 4 , and CO 2 conversions above 90.0% with a H 2 /CO ratio close to 1.0 over 300 h at 800 °C. Structural analysis revealed that the MW method enhanced Ni dispersion and metal‐support interactions, further improving catalyst stability, compared to conventional impregnation method. The BO x overlayer encapsulated Ni nanoparticles, suppressing carbon deposition and preventing sintering. This work demonstrates that rational dual‐interface engineering provides a promising approach for designing durable and efficient Ni‐based catalysts for high‐temperature DRM.