Mesoporous nitrogen-doped carbons activated using potassium hydroxide have large surface areas and high pore volumes, are studied for their hydrogen storage properties. The activated material can store 6.84 wt. of hydrogen at 77 K under a pressure of 20 bar, which is estimated to correspond to a maximum capacity of 8.24 wt. based on the Langmuir simulation. The hydrogen adsorption values show linear relationships with the volumes of micropores and small mesopores under those conditions, which indicates that the small mesopores between the sizes 2 and 3 nm also make contributions to the hydrogen adsorption at high pressure.
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机译:研究了氢氧化钾活化的介孔氮掺杂碳具有较大的表面积和高孔隙体积,并研究了其储氢性能。活化材料在 20 bar 的压力下,在 77 K 下可以储存 6.84 wt.% 的氢气,根据 Langmuir 模拟估计,最大容量为 8.24 wt.%。在这些条件下,氢吸附值与微孔和小介孔的体积呈线性关系,这表明尺寸在2和3 nm之间的小介孔也有助于高压下的氢吸附。
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State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Graduate School, Shanghai Institute of Ceramics, Chinese Academy of Science, 1295 Dingxi Road, Shanghai 200050, People's Republic of China;