Catalytic modification and activation performance of Mg10Ni alloy for automotive fuel cells
Mg10Ni-X alloys(X=MWCNTs,TiF3,MWCNTs-TiF3)were prepared by high-energy ball milling,the effects of MWCNTs/TiF3 catalysts added alone and MWCNTs TiF3 catalysts added together on the particle mor-phology,phase composition and activation behavior of Mg10Ni alloys were studied.The results show that the particle size of Mg10Ni-X alloy after high-energy ball milling treatment reduces in varying degrees by adding catalyst to Mg10Ni alloy.Compared with TiF3 catalyst,MWCNTs catalyst has better particle refining effect,and the particle refining effect of composite addition of MWCNTs-TiF3 catalyst is the best.After high-energy ball milling of Mg10Ni-MWCNTs-TiF3 alloy with MWCNTs-TiF3 catalyst,the microstructures of TiF3 and MWCNTs have not changed.The order of Mg2Ni phase content and Mg2Ni phase cell volume in the alloy from large to small is:Mg10Ni-MWCNTs-TiF3＞Mg10Ni-MWCNTs＞Mg10Ni-TiF3＞Mg10Ni.The activation performance of the alloy improves in varying degrees after the addition of MWCNTs and TiF3 catalysts,the improvement effect of TiF3 catalyst on the activation performance is better than MWCNTs,and the activation performance of the alloy after adding MWCNTs-TiF3 catalyst is the best.
Mg10Ni alloycatalyzerMWCNTs-TiF3micromorphology and phase compositionactivation property
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