以NaH为诱导剂,通过高能球磨工艺制备NH3BH3和NaH的复合物,分析研究了复合物的物相、颗粒形态及其水解性能。结果表明在球磨过程中NH3BH3和NaH反应生成NaBH4新相,但反应并不完全,复合物中的NH3BH3包覆在NaH和生成的NaBH4颗粒表面并发生部分非晶化。诱导剂NaH的加入能有效地改善NH3BH3的水解放氢性能。当NH3BH3/NaH为2.5：1,60℃下,0.1g该复合物10min内放出125mL的H2,约为10.2%（质量分数）,其中一半来源于H2O。
NH3BH3-NaH composites were prepared by high-energy ball milling process with NaH as hydrolysis inductor.The phase and morphology of the as-milled composites were characterized and their hydrolysis behaviors were investigated.It is found that there is a chemical reaction occurred between NH3BH3 and NaH in the process of ball milling,with a new phase NaBH4 generated.Besides,a large change takes place in the morphology of compounds in comparison with NH3BH3,in which the NaH and generated NaBH4 are tightly surrounded by NH3BH3.The results of hydrolysis experiments suggest that the addition of NaH can induce the hydrolysis of NH3BH3 effectively.When the ratio of NH3BH3 and NaH is 2.5：1,this composite releases 125mL hydrogen（10.2wt% H2） within 10min at 60℃ which is the highest in this work.
参考文献
| [1] | Charles W. Hamilton;R. Tom Baker;Anne Staubitz .B-N compounds for chemical hydrogen storage[J].Chemical Society Reviews,2009(1):279-293. |
| [2] | Baitalow F;Wolf G;Grolier JPE;Dan F;Randzio SL .Thermal decomposition of ammonia-borane under pressures up to 600 bar[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,2006(2):121-125. |
| [3] | Roshan P. Shrestha;Himashinie V.K. Diyabalanage;Troy A. Semelsberger;Kevin C. Ott;Anthony K. Burrell .Catalytic dehydrpgenation of ammonia borane in non-aqueous medium[J].International journal of hydrogen energy,2009(6):2616-2621. |
| [4] | C.F. Yao;L. Zhuang;Y.L. Cao;X.P. Ai;H.X. Yang .Hydrogen release from hydrolysis of borazane on Pt- and Ni-based alloy catalysts[J].International journal of hydrogen energy,2008(10):2462-2467. |
| [5] | Ramachandran PV;Gagare PD .Preparation of ammonia borane in high yield and purity, methanolysis, and regeneration[J].Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics,2007(19):7810-7817. |
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