Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1271079 | International Journal of Hydrogen Energy | 2012 | 7 Pages |
Co-based catalyst can significantly improve the dehydrogenation kinetics of the eutectic composite of LiBH4–Mg(BH4)2 (1/1 M ratio). The onset hydrogen desorption temperature of the composite is at about 155 °C, which is ca. 245, 110 or 27 °C lower than that of LiBH4, Mg(BH4)2 or pristine LiBH4–Mg(BH4)2, respectively. Upon holding the samples at 270 °C, the Co catalyzed composite can release hydrogen at a rate 1.6 times faster than that of the pristine one. Electron Paramagnetic Resonance (EPR) characterization evidenced that Co was in a reduced state of Co+ which may serve as the functional species in catalyzing the dehydrogenation of the composite.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The LiBH4–Mg(BH4)2 composite was modified by Co catalyst for the first time. ► The Co-doped sample can release H2 1.6 times faster than that of the pristine one. ► Co+ species may serve as the functional species and help the decomposition of [BH4]−.