TY - JOUR
T1 - In situ synchrotron X-ray diffraction study on the improved dehydrogenation performance of NaAlH4-Mg(AlH4)2 mixture
AU - Yang, Cheng Hsien
AU - Chen, Tzu Teng
AU - Tsai, Wen Ta
AU - Liu, Bernard Haochih
N1 - Funding Information:
The authors gratefully acknowledge the financial support from the National Science Council of the Republic of China (Taiwan) under Grant NSC 100-2221-E-006-245-MY2 and the Research Center for Energy Technology and Strategy, National Cheng Kung University under Grant D100-23003.
PY - 2013
Y1 - 2013
N2 - The dehydrogenation performance and mechanism of the synthesized NaAlH 4-Mg(AlH4)2 powders were investigated by performing thermogravimetric analysis and in situ synchrotron X-ray diffraction analysis. NaAlH4 not only facilitates the first step dehydrogenation of Mg(AlH4)2 in lowering its initial dehydrogenation temperature but also increases the total amount of H2 released. Besides, MgH2 and/or Al phases, the products of the first step dehydrogenation reaction, play a catalytic role in lowering the initial dehydrogenation temperature of NaAlH4. The synthesized NaAlH4-Mg(AlH4) 2 mixture has an initial dehydrogenation temperature as low as 120 °C, and is able to release 5.35 wt% H2 below 350 °C. The self-catalytic dehydrogenation behavior of the NaAlH4-Mg(AlH4) 2 mixture was elaborated in this work with the aid of in situ synchrotron XRD.
AB - The dehydrogenation performance and mechanism of the synthesized NaAlH 4-Mg(AlH4)2 powders were investigated by performing thermogravimetric analysis and in situ synchrotron X-ray diffraction analysis. NaAlH4 not only facilitates the first step dehydrogenation of Mg(AlH4)2 in lowering its initial dehydrogenation temperature but also increases the total amount of H2 released. Besides, MgH2 and/or Al phases, the products of the first step dehydrogenation reaction, play a catalytic role in lowering the initial dehydrogenation temperature of NaAlH4. The synthesized NaAlH4-Mg(AlH4) 2 mixture has an initial dehydrogenation temperature as low as 120 °C, and is able to release 5.35 wt% H2 below 350 °C. The self-catalytic dehydrogenation behavior of the NaAlH4-Mg(AlH4) 2 mixture was elaborated in this work with the aid of in situ synchrotron XRD.
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U2 - 10.1016/j.jallcom.2013.04.169
DO - 10.1016/j.jallcom.2013.04.169
M3 - Article
AN - SCOPUS:84878004082
SN - 0925-8388
VL - 577
SP - 6
EP - 10
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -