Nonthermal Plasma Synthesis of Ammonia over Ni-MOF-74
Nonthermal Plasma Synthesis of Ammonia over Ni-MOF-74
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DOI：
10.1021/acssuschemeng.8b03705
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发表时间：
2019-01-07
影响因子：
8.4
通讯作者：
Carreon, Maria L.
中科院分区：
文献类型：
--
作者：
Shah, Javishk;Wu, Ting;Carreon, Maria L.
在此，我们展示了在Ni-MOF-74作为催化剂的存在下与射频等离子体合成氨的协同方法。与纯Ni金属相比，Ni-MOF显示出更高的氨产率。具体地，观察到在Ni-MOF上氨产率高达0.23g-NH3（g-催化剂kWh）（-1）和能量成本为265MJ mol（-1）。在等离子体存在下的Ni-MOF的催化活性的增强归因于孔的存在，这改善了反应期间的客体和产物分子的传质，开放的Ni金属位点的存在，和较低的表面氢复合。此外，我们的等离子体-Ni MOF催化剂的氨能量产率优于最先进的RF等离子体催化系统。
Herein, we demonstrate a synergistic approach with radiofrequency plasma to synthesize ammonia in the presence of Ni-MOF-74 as catalyst. The Ni-MOF displayed higher ammonia yields as compared to the pure Ni metal. Specifically, ammonia yields as high as 0.23 g-NH3 (g-catalyst kWh)(-1) and energy cost of 265 MJ mol(-1) over Ni-MOF were observed. The enhanced catalytic activity of the Ni-MOF in the presence of plasma was attributed to the presence of pores, which improved mass transfer of guest and product molecules during reaction, the presence of open Ni metal sites, and lower surface hydrogen recombination. Furthermore, the ammonia energy yield of our plasma-Ni MOF catalyst is superior to those of the state-of-the-art RF plasma catalytic systems.