Synergic effect of vanadium trichloride (cas 15611-80-0) on the reversible hydrogen storage performance of the MgMgH2 system

Add time:09/04/2019    Source:sciencedirect.com

Vanadium trichloride (cas 15611-80-0) (VCl3) is one of the best catalysts for the hydrogenation-dehydrogenation MgMgH2 system. X-ray photoelectron spectroscopy (XPS) has shown that VCl3 reduced to metallic vanadium during ball milling along with MgH2. The in-situ-formed metallic vanadium doped over the MgH2 surface which has shown an excellent catalytic effect on hydrogenation-dehydrogenation of the MgMgH2 system. The catalyzed surface reduced the activation energies of hydrogenation-dehydrogenation reactions and correspondingly on-set hydrogenation-dehydrogenation temperatures. The microstructural analysis has also shown an excellent grain refinement property of VCl3 which reduced the crystallite size of MgH2. The decreased crystallite size decreases the diffusion path length of hydrogen and increases the active surface area which eventually enhances the hydrogenation-dehydrogenation kinetics of MgMgH2.

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