As an important branch of hydrogen storage materials, adsorptive materials have unique advantages such as high reversibility, fast adsorption rate and mild release conditions, etc. At present, the research on adsorptive hydrogen storage materials mostly focus on the pressure conditions of 30–300 bar, while the atmospheric hydrogen storage performance of adsorptive materials needs to be further enhanced. Based on the sonication-assisted activation process, micro-nano scale synchronous "carving" of viscose fiber was achieved in activation process for viscose fiber after carbonization, and petaloid activated carbon fibers (FL-VACFs) and rod-shaped activated carbon fibers (RL-VACFs) were constructed. Specific surface area of FL-VACFs and RL-VACFs can reach 1085.77 m g and 956.81 m g respectively, and the ultramicropore relative contents can reach 44% and 52.08% respectively. Under the synergistic action of abundant ultramicropores and oxygen-containing functional groups, FL-VACFs and RL-VACFs exhibit excellent hydrogen storage density of 2.04 wt% at77 K, 1 bar. Additionally, Multisite-Langmuir model ( = 3) model is discovered more suitable for accurate describing the hydrogen adsorption process of FL-VACFs and RL-VACFs under atmospheric pressure.

中文翻译：

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常压储氢活化过程中粘胶纤维微纳尺度同步“雕刻”

吸附材料作为储氢材料的重要分支，具有可逆性高、吸附速率快、释放条件温和等独特优点。目前，吸附型储氢材料的研究大多集中在30~300 bar的压力条件下。 ，而吸附材料的大气储氢性能有待进一步增强。基于超声辅助活化工艺，对粘胶纤维碳化后的活化过程实现了粘胶纤维的微纳级同步“雕刻”，得到了花瓣状活性炭纤维（FL-VACFs）和棒状活性炭纤维（RL） -VACF）已构建。 FL-VACFs和RL-VACFs的比表面积分别可达1085.77 m g-1和956.81 m g-1，超微孔相对含量分别可达44%和52.08%。在丰富的超微孔和含氧官能团的协同作用下，FL-VACF和RL-VACF在77 K、1 bar下表现出优异的储氢密度，为2.04 wt%。此外，发现Multisite-Langmuir模型（=3）模型更适合准确描述FL-VACF和RL-VACF在大气压下的氢吸附过程。