CAJ | 학술논문

采用氢化NaH/Al+x TiC(x=0,5%,8%,10%,庵尔分摩)混合物的方法制备TiC掺NaAlH4配位氢化物,系统研究TiC催化剂含量对样品吸放氢行为的影响.结果表明:TiC能有效改善铝氢化钠的吸放氢动力学性能,样品的加氢速率随着TiC含量的增加而提高；TiC掺NaAlH4复合物具有良好的吸放氢循环稳定性,掺杂10%TiC(摩尔分数)的NaAlH4复合物经过8次吸放氢循环后,其吸、放氢容量仍可稳定保持为4.5%和3.8%(质量分数)；TiC掺NaAlH4复合物的颗粒尺寸可降低到50-100 nm,这对改善体系吸放氢反应动力学起到主要作用.
채용경화NaH/Al+x TiC(x=0,5%,8%,10%,암이분마)혼합물적방법제비TiC참NaAlH4배위경화물,계통연구TiC최화제함량대양품흡방경행위적영향.결과표명:TiC능유효개선려경화납적흡방경동역학성능,양품적가경속솔수착TiC함량적증가이제고；TiC참NaAlH4복합물구유량호적흡방경순배은정성,참잡10%TiC(마이분수)적NaAlH4복합물경과8차흡방경순배후,기흡、방경용량잉가은정보지위4.5%화3.8%(질량분수)；TiC참NaAlH4복합물적과립척촌가강저도50-100 nm,저대개선체계흡방경반응동역학기도주요작용.
TiC-doped NaAlH4 complex hydrides were prepared by hydrogenation of ball-milled NaH/Al mixture with x1TiC powder (x = 0,5％,8％,10％,mole fraction).The effects of TiC catalyst content on the absorption/desorption behaviors of the samples were investigated.The results show that TiC can improve the hydriding/dehydriding kinetics of sodium aluminum hydride,the hydriding rate of the sample increases with increasing TiC content.It is found that the TiC-doped NaAlH4 composites have a relatively good cyclic stability.The composite doped with 10％ TiC maintains steadily about 4.5％ (mass fraction) hydrogen absorption capacity as against about 3.8％ (mass fraction) hydrogen desorption capacity over 8 cycles.The particle sizes of the TiC-doped NaAlH4 composites can be reduced to 50-100 nm,which may play an important role in improving the hydriding/dehydriding kinetics.