纳米多孔Fe-Si-B-P的脱合金制备及其电化学性能  

Formation and Electrochemical Properties of Nanoporous Fe-Si-B-P by Dealloying

作　　者：赖祥晔 翁楠 池昱晨 秦凤香 LAI Xiangye;WENG Nan;CHI Yuchen;QIN Fengxiang(School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学材料科学与工程学院,南京210094

出　　处：《材料研究学报》2023年第11期801-808,共8页Chinese Journal of Materials Research

基　　金：国家自然科学基金(52371157和51671106)。

摘　　要：在0.05 mol/L H_(2)SO_(4)溶液中对773~833 K热处理后的Fe_(76)Si_(9)B_(10)P_(5)非晶合金进行脱合金处理,采用脱合金法制备出Fe-Si-B-P纳米多孔材料。利用X射线衍射仪、扫描电子显微镜、透射电子显微镜等手段以及电化学工作站表征其表面形貌、微观结构和组成,研究其电化学性能。结果表明,热处理后的Fe_(76)Si_(9)B_(10)P_(5)非晶合金晶化为α-Fe、Fe_(2)B和Fe_(3)P相,在脱合金过程中α-Fe晶粒优先溶解形成纳米多孔结构,随着热处理温度从773 K提高到833 K材料中纳米多孔的孔径从150 nm增大到260 nm。同时,较大的比表面积提供更多的催化活性位点使纳米多孔Fe-Si-B-P具有比Fe_(76)Si_(9)B_(10)P_(5)非晶合金更优异的氧化还原性能。Fe_(76)Si_(9)B_(10)P_(5)amorphous alloys annealed at 773~833 K with heterogeneous microstructure consisting ofα-Fe,Fe_(2)B and Fe_(3)P phases,were de-alloyed in 0.05 mol/L H_(2)SO_(4)solution.The porous structure was formed due to the preferential dissolution ofα-Fe phase in the form of micro-coupling cells betweenα-Fe phase and cathodic residual phases.The size of nanopores increased from 150 nm to 260 nm with the temperature increasing from 773 K to 883 K.The nanoporous Fe-Si-B-P electrode showed much superior redox performance compared with Fe_(76)Si_(9)B_(10)P_(5)amorphous alloy,which was ascribed to its large specific area and more electrochemical active sites.

关 键 词：金属材料 非晶晶化 脱合金 纳米多孔结构 氧化还原反应 

分 类 号：TG403.40[金属学及工艺—焊接]