%0 Journal Article
%T ElectrocatalyticOxidationofSodiumBorohydrideonaNanoporousNi/Zn-NiElectrode
%A Mir Ghasem HOSSEINI
%A Mehdi ABDOLMALEKI
%A Sajjad ASHRAFPOOR
%J ´ß»¯Ñ§±¨
%P 1817-1824
%D 2012
%R 10.1016/S1872-2067(11)60464-6
%X £¿ANi-Znbinarymetalcoatingwaselectrochemicallydepositedonacopperelectrodethatwascoatedwithnickel(bottomlayer).Thiswasthenetchedinconcentratedalkalinesolution(30wt%NaOH)toproduceananoporousNielectrocatalyticsurfaceforborohydrideelectro-oxidationinalkalinesolution.ThebulkandsurfacecompositionsofthecoatingbeforeandafteralkalineleachingweredeterminedbyatomicabsorptionspectroscopyandenergydispersiveX-rayanalysis.Thesurfacemorphologywasinvestigatedbyscanningelectronmicroscopy.ThecharacterizationshowedthattheleachedNi/Zn-Nicoatinghasananoporousstructure.Electrocatalyticactivityforborohydrideelectro-oxidationwasassessedbycyclicvoltammetryandelectrochemicalimpedancespectroscopy.Theimprovedactivityoftheelectrodewasrelatedtotheremovalofcorrosionproductsandtheformationofnanoporesandcracksduringalkalineleaching.CyclicvoltammetrystudiesconfirmedthatthealkalineleachingprocessimprovedtheactivityoftheNi/Zn-NicoatingincomparisontothatofasmoothNideposit,anditgaveananodicpeakcurrentdensitythatwas21timeshigher.
%K leachedNi/Zn-Nicoating
%K electrochemicaldeposition
%K nanoporous
%K borohydrideelectro-oxidation
%K electrochemicalimpedancespectroscopy
%U http://www.chxb.cn/CN/abstract/abstract20826.shtml