کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1279615 | 1497654 | 2008 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Hydrogen desorption properties of Li–BN–H system synthesized by mechanical milling Hydrogen desorption properties of Li–BN–H system synthesized by mechanical milling](/preview/png/1279615.png)
BN–NHxBN–NHx samples were synthesized by ball milling hexagonal boron nitride (h-BN) under hydrogen and/or ammonia atmosphere firstly. Then, the BN–NHxBN–NHx samples were ball milled with lithium hydride under hydrogen atmosphere to synthesize Li–BN–H composites. XRD, FT-IR and TG-MS were used to investigate the microstructure and gas desorption properties of samples. Experimental results show that hydrogen and ammonia can be chemically absorbed in h-BN by mechanical milling method. It is found that nanostructure, which formed by ball milling h-BN under hydrogen, is of great advantage to ammonia absorption. For the Li–BN–H composite, hydrogen starts to be released around 100 °C and the peak temperature is around 200 °C, 5.0 wt% hydrogen was desorbed during heating up to 500 °C without ammonia emission.
Journal: International Journal of Hydrogen Energy - Volume 33, Issue 12, June 2008, Pages 3128–3131