KH+Ti co-doped NaAlH4 for high-capacity hydrogen storage
作者： Ping Wang , Xiang-Dong Kang , Hui-Ming Cheng
DOI: 10.1063/1.2084308
关键词: Hydrogen storage 、 Catalysis 、 Enthalpy 、 Titanium 、 Hydrogen 、 Hydride 、 Decomposition 、 Metal 、 Inorganic chemistry 、 Chemical engineering 、 Chemistry
摘要: A method for preparation of Ti-doped NaAlH4 with high hydrogen capacity was developed, in which the NaH∕Al mixture mechanically milled a catalytic amount KH together metallic Ti. The addition found to result pronounced improvement dehydriding performance Na3AlH6∕NaH+Al step. As result, practical cycling has been markedly enhanced from 3.3wt% hydride 4.7wt% KH+Ti co-doped material. Moreover, enhancement on arising upon adding observed persist following dehydrogenation∕hydrogenation cycles. Structural investigation shows that led lattice expansion. it enthalpy change decomposition step underwent considerable decrease KH. Therefore, property may be ascribed favorable thermodynamic adjustment
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