CaltechAUTHORSModeling of Hydrogen Storage Materials: A Reactive Force Field for NaHJ. G. O.Ojwang'authorRutgervan SantenauthorGert JanKramerauthorAdri C. T.van DuinauthorWilliam A., IIIGoddardauthorParameterization of a reactive force field for NaH is done using ab initio derived data. The parameterized force field(ReaxFFNaH) is used to study the dynamics governing hydrogen desorption in NaH. During the abstraction process of surface molecular hydrogen charge transfer is found to be well described by the parameterized force field. To gain more insight into the mechanism governing structural transformation of NaH during thermal decomposition a heating run in a molecular dynamics simulation is done. The result shows that a clear signature of hydrogen desorption is the fall in potential energy surface during heating.Caltech Library Services2008-09-17American Institute of PhysicsBook Section

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