Dry Reforming of CH₄/CO₂by Stable Ni Nanocrystals on Porous Single‐Crystalline MgO Monoliths at Reduced Temperature

Abstract

Dry reforming of CH₄ /CO₂ provides a promising and economically feasible route for the large-scale carbon fixation; however, the coking and sintering of catalysts remain a fundamental challenge. Here we stabilize single-crystalline Ni nanoparticles at the surface of porous single-crystalline MgO monoliths and show the quantitative production of syngas from dry reforming of CH₄ /CO₂ . We show the complete conversion of CH₄ /CO₂ even only at 700 °C with excellent performance durability after a continuous operation of 500 hours. The well-defined and catalytically active Ni-MgO interfaces facilitate the reforming reaction and enhance the coking resistance. Our findings would enable an industrially and economically viable path for carbon reclamation, and the "Nanocrystal On Porous Single-crystalline Monoliths" technique could lead to stable catalyst designs for many challenging reactions.