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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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ElectrocatalyticOxidationofSodiumBorohydrideonaNanoporousNi/Zn-NiElectrode
DOI: 10.1016/S1872-2067(11)60464-6, PP. 1817-1824
Keywords: leachedNi/Zn-Nicoating,electrochemicaldeposition,nanoporous,borohydrideelectro-oxidation,electrochemicalimpedancespectroscopy
Abstract:
？ANi-Znbinarymetalcoatingwaselectrochemicallydepositedonacopperelectrodethatwascoatedwithnickel(bottomlayer).Thiswasthenetchedinconcentratedalkalinesolution(30wt%NaOH)toproduceananoporousNielectrocatalyticsurfaceforborohydrideelectro-oxidationinalkalinesolution.ThebulkandsurfacecompositionsofthecoatingbeforeandafteralkalineleachingweredeterminedbyatomicabsorptionspectroscopyandenergydispersiveX-rayanalysis.Thesurfacemorphologywasinvestigatedbyscanningelectronmicroscopy.ThecharacterizationshowedthattheleachedNi/Zn-Nicoatinghasananoporousstructure.Electrocatalyticactivityforborohydrideelectro-oxidationwasassessedbycyclicvoltammetryandelectrochemicalimpedancespectroscopy.Theimprovedactivityoftheelectrodewasrelatedtotheremovalofcorrosionproductsandtheformationofnanoporesandcracksduringalkalineleaching.CyclicvoltammetrystudiesconfirmedthatthealkalineleachingprocessimprovedtheactivityoftheNi/Zn-NicoatingincomparisontothatofasmoothNideposit,anditgaveananodicpeakcurrentdensitythatwas21timeshigher.
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