Improved hydrogen desorption properties of Co-doped Li2BNH6 |
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| Authors: | XueLi Zheng GuoTao Wu Teng He HaiLiang Chu Hua Chen Ping Chen |
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| Affiliation: | ZHENG XueLi 1,2,WU GuoTao 2*,HE Teng 2,CHU HaiLiang 2,CHEN Hua 1 & CHEN Ping 2 1 Key Lab of Green Chemistry and Technology,Ministry of Education,the Institute of Homogeneous Catalysis,College of Chemistry,Sichuan University,Chengdu 610064,China,2 Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023 |
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| Abstract: | The hydrogen desorption properties of Li2BNH6 were improved by doping with cobalt. With the addition of CoCl2 (7 wt%), more than 8 wt% of hydrogen was released from Li2BNH6 at temperatures below 210°C, which is approximately 90°C lower than that of pristine Li2BNH6. X-ray diffraction, Fourier transform-infrared and Raman characterizations revealed that the dehydrogenation was a stepwise process with the formation of intermediates Li4BN3H10 and LiBH4 and final products of Li3BN2 and LiH. The introduction of Co greatly accelerated the dehydrogenation of Li4BN3H10. X-ray absorption near-edge structure measurements revealed that Co and CoB species formed during ball milling of CoCl2 with LiBH4 and LiNH2, which may function as catalyst in the subsequent dehydrogenation. |
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| Keywords: | lithium amide cobalt lithium borohydride hydrogen release |
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