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Construction of Uranium-Graphdiyne Nanowall Composite for Efficient Thermal Catalytic Synthesis of Ammonia Under Mild Conditions
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DOI：10.1002/cctc.70901.png)
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Abstract
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We report herein on the preparation of the uranium-graphdiyne nanowall composite (U/GDY-NW) and thus the efficient thermal catalytic synthesis on ammonia under mild conditions through the construction of a local catalytic microenvironment. U/GDY-NW exhibits significant catalytic activity starting at 70 °C. At 150 °C and 15 bar, the ammonia production rate reaches as high as 1037 ± 70 µmol·g−1 h−1. Within the local microenvironment, the U/GDY-NW composite not only catalyzes ammonia formation via the distal pathway mechanism but also enables oxygen-containing functional groups on the surface to actively participate in the reaction by generating hydroxylamine intermediates, thereby significantly enhancing the overall catalytic efficiency. Our findings advance the catalysts development for ammonia synthesis under mild conditions, support green ammonia industrialization, and reveal the influence of the confined structure of GDY on its thermal catalytic ammonia production, providing a rational design strategy for actinide–carbon hybrid materials.
Keywords:
ammonia production
graphdiyne
thermal catalysis
uranium
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