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《电化学法制备Ni-W-P纳米线阵列电极及其催化析氢性能.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学~(WuliHuaxueXuebao1ActaP.一Chim.Sin.2011,27(4),900-904April[Article]Ⅵr、vW.whxb.pku.edu.cn电化学法制备Ni-W-P纳米线阵列电极及其催化析氢性能张卫国尚云鹏刘丽娜姚素薇王宏智(天津大学化工学院杉杉表面技术研究室,天津300072)摘要:采用二次氧化法制备了多孔阳极氧化铝(AAO)模板,通过控制电位沉积技术在AAO模板内组装了Ni-W-P合金纳米线阵列.在扫描电子显微镜(SEM)下观察到N__W—P纳米线表面光滑
2、,长约20um,直径均匀(约为100nm),与AAO模板孔径基本一致.阴极极化曲线和交流阻抗图谱(EIS)的测试结果表明,N_.W-P合金纳米线阵列电极析氢反应(HER)电阻减小,具有更高的催化析氢活性,电流密度为10mA·cm时,析氢极化电位较N_-W.P合金电极正移约250m关键词:AAO模板:Ni-W—P合金:纳米线阵列:析氢反应中图分类号:0646ElectrochemicalPreparationofaNi--W--PNanowireArrayandItsPhotoeIectroCatalyti
3、CActivityfortheHydrogenEvolutionReactionZHANGWei—GuoSHANGYun—PengLIULi—NaYAOSu—WeiWANGHong—Zhi(SUGIYAMALaboratoryofSurfaceTechnology,SchoolofChemicalEngineeringandTechnology,TianjinUniversity,Tianj。in300072,PR.China)Abstract:ANi.W.Palloynanowirearraywasfa
4、bricatedinthenanOchanneJsofanaIuminumanodicoxide(AAO)membranebyelectrodeposition.Scanningelectronmicroscopy(SEM)wasusedtocharacterizethemorphologyoftheNi-W—Pnanowirearrays.Thesenanowireshaduniformdiametersofabout10Onmandthisaccordedwiththediametersoftheho
5、les.Thelengthofthesenanowireswasabout20um.Cathodicpolarizationcurvesandelectrochemicalimpedancespectroscopy(EIS)wereusedtostudytheelectrocatalyticactivityoftheeleclrOdeDOsiledNi-W-PalloyforthehydrogenevolutionreactionfHER).TheresultsclearlyshowedthattheNi
6、-W-PalloynanowirearrayelectrodeshadthehighestelectrocatalyticactivityfortheHERandtheoverpotentialwasloweredby250mVat10mA·cmcomparedwiththeas-electroplatedNi-W-Palloy.KeyWords:AAOmembrane;Ni—W-Palloy;Nanowirearray;Hydrogenevolutionreaction1引言氢活性,引起了广泛关注.通过
7、电沉积方法,人们已Ni—W-P合金具有良好的可焊性、耐磨性和耐蚀经制备了不同组成和结构的Ni—W-P合金镀层,并对性,同时,Ni—W-P合金的电子传导容易,合金电阻率合金镀层的催化性能进行了深入的研究.本文在此低,导电性优良.近年来大量研究表明,Ni—W-P合基础上,以铝阳极氧化膜(AAO)为模板,通过电沉积金在酸性介质和碱性介质中均表现出优异的催化析法成功制备了Ni—W-P合金纳米线阵列电极,考察了Received:October27,2010;Revised:December20,2010;Publi
8、shedonWeb:February23,2011.‘Correspondingauthor.Email:wanghz@tju.edu.cn;Tel:+86—22—27402482.TheprojectwassupportedbytheNaturalScienceFoundationofTianjin,China(033602411).天津市自然科学基金(033602411)资助项目⑥EditorialoficeofActaP
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