Hydrogen Storage in High Surface Area Carbons with Identical Surface Areas but Different Pore Sizes: Direct Demonstration of the Effects of Pore Size
Hydrogen Storage in High Surface Area Carbons with Identical Surface Areas but Different Pore Sizes: Direct Demonstration of the Effects of Pore Size
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DOI：
10.1021/jp3100365
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发表时间：
2012-11
影响因子：
3.7
通讯作者：
Eric Masika;R. Mokaya
中科院分区：
文献类型：
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作者：
Eric Masika;R. Mokaya
我们提供的实验数据直接显示了孔径大小对高表面积多孔碳吸收氢的影响。通过比较具有相同表面积但具有不同孔径和孔径分布的多孔碳的吸收能力，可以直接研究孔径的影响。多种合成方法已被用来制备具有相似表面积、孔径范围从微孔范围（12 A）到超微孔/低中孔（23 A）和低中孔（31 A）范围的碳材料。这样可以对孔径的影响进行简单直接的分析，而总表面积不会发生任何变化。孔径本质上定义了氢的吸收，而没有明显考虑相似的表面积。具有相同表面积 3340 m2/g 的碳的过量和总氢吸收量（在 -196 °C 和 20 bar 下）从 3.7 和 5.4 wt%（31 A 样品）增加到 4.8 和 6.3 wt%（23 A 样品），最后增加到 6.3 和 7.3 wt%。
We present experimental data that directly shows the effect of pore size on hydrogen uptake in high surface area porous carbons. A direct study of the influence of pore size has been made possible by comparing the uptake capacity of porous carbons with identical surface areas but with different pore sizes and pore size distributions. A variety of synthesis methods have been used to prepare carbon materials with similar surface areas with pore sizes ranging from the micropore range (12 A) to supermicropore/lower mesopore (23 A) and lower mesopore (31 A) range. This allowed a simple and straightforward analysis of the influence of pore size without any changes in total surface area. The pore size essentially defines the hydrogen uptake with no apparent regard to the similar surface areas. The excess and total hydrogen uptake (at −196 °C and 20 bar) of carbons with identical surface areas of 3340 m2/g, increased from 3.7 and 5.4 wt % (31 A sample), to 4.8 and 6.3 wt % (23 A sample) and to 6.3 and 7.3 wt % fo...