Cheng Fangyuan, Duan Xiuyun, Xie Kui
Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Angew Chem Int Ed Engl. 2021 Aug 16;60(34):18792-18799. doi: 10.1002/anie.202106243. Epub 2021 Jul 16.
Dry reforming of CH /CO 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 CH /CO . We show the complete conversion of CH /CO 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.
CH₄/CO₂的干重整为大规模碳固定提供了一条有前景且经济可行的途径；然而，催化剂的结焦和烧结仍然是一个根本性挑战。在此，我们将单晶镍纳米颗粒稳定在多孔单晶氧化镁整体材料的表面，并展示了通过CH₄/CO₂干重整定量生产合成气。我们表明，即使仅在700°C时，CH₄/CO₂也能完全转化，在连续运行500小时后具有出色的性能耐久性。明确且具有催化活性的Ni-MgO界面促进了重整反应并增强了抗结焦性能。我们的发现将为碳回收开辟一条工业上和经济上可行的道路，并且“多孔单晶整体材料上的纳米晶体”技术可能会为许多具有挑战性的反应带来稳定的催化剂设计。
