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[摘要]：An effective strategy of utilizing electrospinning techniques to fabricate MgCl(2) catalyzed ammonia borane (AB) nanofibers with a tunable fiber diameter is reported. The synergistic effect obtained by combining nanofibers and metallic catalyst plays a crucial role in the decomposition of MgCl(2)-doped AB nanofibers, which leads to significant improvements in dehydrogenation kinetics and complete suppression of unwanted byproducts. The results of dehydrogenation show that MgCl(2)-doped AB nanofibers were able to release over 10.0 wt % pure H(2) below 100 degrees C with favorable kinetics, a significant advance over releases from bulk AB. Furthermore, the dehydrogenation of MgCl(2)-doped AB nanofibers gives a weak exothermic reaction, -3.84 kJ mol(-1) H(2), which is dramatically lower than that of neat AB (-21 kJ mol(-1) H(2)), which suggests that the electrospun sample is potentially more feasible to reverse. The findings in this paper provide general guidelines and inspiration for the design and synthesis of novel nano-fibrous materials with controllable dimensions for hydrogen storage applications. |
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