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Small and uniform ruthenium nanoparticles (1.3–2.0nm) supported on the mixture of MgO and carbon nanotubes (CNTs) were prepared by microwave irradiation and the promoted Ru/MgO–CNTs (K–Ru/MgO–CNTs-a) exhibited high activity for ammonia synthesis. The results show that the highest activity of the K–Ru/MgO–CNTs-a catalyst is 5631μmolh-1g-cat-1 under 0.20MPa at 683K. The activity is 2.2 times as active...
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