Ammonia borane-hydride system

Another effect is that confinement in pores might influence the phases formed for complex systems. Although not completely understood this is found experimentally, for instance, by Autrey ef al. for the confinement of ammonia borane in mesoporous Si02 and carbon (see Section 10.6.1) [74]. For complex materials often not only thermodynamic considerations but also kinetics have an import influence on which phases are formed upon hydriding or dehydriding. For instance, on decomposition of UBH4 the thermodynamically most favorable reaction is ... 

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