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Mg–Ce alloy was prepared by induction melting under vacuum, hydrided firstly and then Mg–Ce/Ni composite was obtained by mechanical milling Mg–Ce hydrides under Ar for 50h with addition of nano-sized Ni powder. XRD results showed CeMg 12 formed in melted alloy. CeMg 12 disappeared and CeH 2.53 emerged during subsequent hydriding. The phase composition was not changed during...
A simple two-dimensional model involving kinetics and mass transfer in a PEM fuel cell cathode is presented. In this model, the catalyst layer was simplified as an infinite thin film. The oxygen mass transfer in the gas diffusion layer (GDL) was described using a pure diffusion equation that introduced equivalent oxygen diffusivity. The PEM fuel cell performance under the influence of current collector...
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