Hydrogen evolution reaction on the composite LaNi5/Ni-S alloy film in alkaline medium

Acta Metall Sin

2008, Vol. 44

Issue (7): 887-891 DOI:

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Hydrogen evolution reaction on the composite LaNi5/Ni-S alloy film in alkaline medium

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东北大学

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;. Hydrogen evolution reaction on the composite LaNi5/Ni-S alloy film in alkaline medium. Acta Metall Sin, 2008, 44(7): 887-891 .

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Abstract By molten salt electrolysis combined with aquatic electrodeposition, the composite LaNi5/Ni-S film with high stability and HER activity was obtained. The results showed that in the Na3AlF6-La2O3 (92 : 8) molten salt system, although the cathodic potential is much lower than the decomposition potential of lanthanum, the LaNi5 film could be obtained due to the strong depolarization ability of Ni cathode. The composite LaNi5/Ni-S film (η150 = 75 mV, 80oC) could absorb large amount of H atoms, which would be oxidized and avoid the dissolution of the Ni-S film under the state of open-circuit effectively and prolong the lifetime of the cathode.

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Received: 14 December 2007

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