CAJ | 학술논문

配位氢化物具有较高的质量储氢密度,已成为国内外储氢材料的研究热点,但尚未解决的脱/加氢温度过高、速率慢和可逆性差等问题是制约其实际应用的主要原因.利用孔性材料的结构特点来构建纳米尺度的空间约束体系,可有效地改善配位氢化物的脱/加氢性能.以NaAlH4为例,介绍了孔性材料的制备和表面修饰,分析了配位氢化物/孔性介质空间约束体系的构建及其且兑/加氢行为.这种空间约束体系为改善配位氢化物的储氢性能提供了一条新途径.进一步构建配位氢化物/孔性介质/催化剂的空间约束体系,实现对配位氢化物的复合催化,将是今后努力的方向.
배위경화물구유교고적질량저경밀도,이성위국내외저경재료적연구열점,단상미해결적탈/가경온도과고、속솔만화가역성차등문제시제약기실제응용적주요원인.이용공성재료적결구특점래구건납미척도적공간약속체계,가유효지개선배위경화물적탈/가경성능.이NaAlH4위례,개소료공성재료적제비화표면수식,분석료배위경화물/공성개질공간약속체계적구건급기차태/가경행위.저충공간약속체계위개선배위경화물적저경성능제공료일조신도경.진일보구건배위경화물/공성개질/최화제적공간약속체계,실현대배위경화물적복합최화,장시금후노력적방향.
Complex hydrides have attracted intense interest owing to their higher mass hydrogen density compared with that of conventional metal hydrides ; however, their practical apphcations are blocked by high thermal stabihty, slow re-action kinetics and poor reversibihty. An improved hydrogen storage property has been obtained by using space-confining complex hydride in porous materials. The preparation and surface modification of porous materials are briefly introduced, followed by the incorporation of NaAIH4 into porous materials and the resulting effects on its dehydrogenation/rehydrogena-tion behaviors. The space confinement method provides a new approach to enhance the hydrogen storage properties of complex hydrides.