期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 43, 期 3, 页码 1643-1650出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2017.11.112
关键词
Mg-based alloy; Ball milling; Activation energy; Catalysis; Hydrogen storage properties
资金
- National Natural Science Foundations of China [51761032, 51371094, 51471054]
- Natural Science Foundation of Inner Mongolia, China [2015MS0558]
The Y-Mg-Ni-based YMg11Ni + 5 wt%CeO2 (named YMg11Ni-5CeO(2)) alloys were prepared by using mechanical ball milling. The influences of CeO2 on the structure and gaseous hydrogen storage performance of YMg11Ni alloy were studied systematically. The structures of sample alloy were determined by X-ray diffraction (XRD) and high resolution transmission electron microscope (HRTEM). The gaseous hydrogen storage performances were tested by using an automatically controlled Sieverts apparatus. The dehydrogenation performance was studied by thermogravimetry (TG) and differential scanning calorimetry (DSC). The hydrogen desorption activation energy was calculated by adopting Kissinger methods. The results show that adding CeO2 into YMg11Ni can lower the hydrogen storage thermodynamics slightly and increase the hydrogen absorption/desorption rate obviously. Moreover, the hydrogen desorption activation energy (E-de(k)) of the alloys is 91.53 kJ mol(-1) for YMg11Ni alloy and 74.89 kJ mol(-1) for YMg11Ni-5CeO(2) alloy, respectively. This is because the hydrogen desorption kinetic of the alloy is improved by adding catalyst CeO2. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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