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Cobalt-catalyzed hydrogen desorption from the LiNH2-LiBH4 system
Authors:Tang Wan Si  Wu Guotao  Liu Tao  Wee Andrew T S  Yong Chaw Keong  Xiong Zhitao  Hor Andy T S  Chen Ping
Affiliation:Department of Chemistry, National University of Singapore, Singapore117542.
Abstract:
A doping of 5 wt% CoCl2 considerably decreases the dehydrogenation temperature of a mixture of LiNH2 and LiBH4. More that 8 wt% of hydrogen can be released at ca. 155 degrees C. X-Ray absorption near edge structure (XANES) spectroscopy indicated the formation of metallic Co after ball milling CoCl2 with LiNH2 and LiBH4. Extended X-ray absorption fine structure (EXAFS) spectroscopy measurements revealed that Co particles have poor crystallinity and are finely dispersed in the sample, which could lead to a high catalytic efficiency.
Keywords:
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