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.
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)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
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)。
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
metallic materials
crystallization of amorphous alloys
dealloying
nanoporous structure
redox reaction
