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Outline
Porous materials show great potential for hydrogen storage due to their unique pore structures，high specific surface areas，and abundant active sites. In this study，three kinds of porous materials with different typical structures were prepared，including carbon composite diatomite inorganic skeleton materials （HS-inorg-C-1，HS-inorg-C-2），metal-organic frameworks （HS-MOF-808，HS-UiO-66-1，HS-UiO-66-2），and highly cross-linked organic porous polymer materials containing secondary amine （—NH—）（HS-org-MATA，HS-org-CPP-PEI）. The hydrogen storage capacities and influencing factors of these materials are investigated. The results show that under 298 K and 2.0 MPa conditions，the three types of prepared hydrogen storage materials exhibited significantly different hydrogen storage mass fractions，ranging from 0.14% to 3.64%. The crosslinked HS-UiO-66-2，derived from HS-UiO-66-1 modification，demonstrates optimal hydrogen storage performance. At room temperature，the hydrogen storage quality of the HS-UiO-66-2 sample is 11 times higher than that of HS-UiO-66-1. HS-inorg-C-1 demonstrates excellent cycling stability，with a 10.96% capacity loss after five hydrogen adsorption-desorption cycles at 77 K and 2.0 MPa，and it shows good cycle stability and reversibility. The study works provide new design principles for developing high-performance physical hydrogen storage materials.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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