Lyu Jinzhe, Kudiiarov Viktor, Lider Andrey
Division for Experimental Physics, School of Nuclear Science & Engineering, National Research Tomsk Polytechnic University, Lenin Ave. 43, Tomsk 634034, Russia.
Nanomaterials (Basel). 2020 Feb 1;10(2):255. doi: 10.3390/nano10020255.
Many researchers have carried out experimental research and theoretical analysis on hydrogen storage in carbon nanotubes (CNTs), but the results are very inconsistent. The present paper reviewed recent progress in improving the hydrogen storage properties of CNTs by various modifications and analyzed the hydrogen storage mechanism of CNTs. It is certain that the hydrogen storage in CNTs is the result of the combined action of physisorption and chemisorption. However, H adsorption on metal-functionalized CNTs still lacks a consistent theory. In the future, the research of CNTs for hydrogen adsorption should be developed in the following three directions: (1) A detailed study of the optimum number of metal atoms without aggregation on CNT should be performed, at the same time suitable preparation methods for realizing controllable doping site and doped configurations should be devised; (2) The material synthesis, purification, and activation methods have to be optimized; (3) Active sites, molecular configurations, effectively accessible surface area, pore size, surface topology, chemical composition of the surface, applied pressure and temperature, defects and dopant, which are some of the important factors that strongly affect the hydrogen adsorption in CNTs, should be better understood.
许多研究人员对碳纳米管（CNTs）储氢进行了实验研究和理论分析，但结果很不一致。本文综述了通过各种改性提高碳纳米管储氢性能的最新进展，并分析了碳纳米管的储氢机理。可以确定的是，碳纳米管中的储氢是物理吸附和化学吸附共同作用的结果。然而，氢在金属功能化碳纳米管上的吸附仍缺乏统一的理论。未来，碳纳米管氢吸附研究应朝着以下三个方向发展：（1）详细研究碳纳米管上无团聚的最佳金属原子数量，同时设计出实现可控掺杂位点和掺杂构型的合适制备方法；（2）必须优化材料合成、纯化和活化方法；（3）活性位点、分子构型、有效可及表面积、孔径、表面拓扑结构、表面化学成分、施加的压力和温度、缺陷和掺杂剂等，这些是强烈影响碳纳米管氢吸附的一些重要因素，应得到更好的理解。
