典型文献
Preparation of Flaky Hexagonal Nanoporous Au-Cu and Au Particles via Dealloying
文献摘要：
Nanoporous metals have attracted significant attention owing to their excellent physical,chemical,and biological properties.However,preparing ultrafine nanoporous metal particles(1-5 μm)with specific geometries remains challenging.Herein,we report a simple strategy to prepare ultrafine flaky hexagonal nanoporous Au-Cu and Au particles via dealloying.Mg-based alloy ribbons with ultrafine flaky hexagonal Mg-Au(Cu)-Gd particles dispersed in a Mg-Cu(Au)-Gd metallic glassy matrix were prepared.The size and morphology of the precipitated flaky hexagonal Mg-Au(Cu)-Gd particles were controlled by the solidification process of a Mg61Cu21Au7Gd11 alloy melt.Ultrafine flaky hexagonal nanoporous Au-Cu particles(diagonal diameter 2.58±0.44 pm,ligament size～28 nm),Au-1 particles(diagonal diameter 2.38±0.35 pm,ligament size～83 nm)and Au-2 particles(diagonal diameter 2.39+0.44 pm,ligament size～66 nm)were prepared via ultrasonic-assisted dealloying of Mg61Cu21Au7Gd11 alloy ribbons in 0.25 M HCl/ethanol,1 M HCl/ethanol and 0.25 M HNO3/ethanol solutions,respectively.The ultrafine flaky hexagonal nanoporous Au-Cu and Au particles with a large specific surface area have a uniform particle size and shape,implying that they possess adequate powder fluidity and excellent catalytic properties.Moreover,the forma-tion mechanism of the MgAu(Cu)Gd phase in solidified Mg-Cu-Au-Gd alloys was discussed.This study provides a novel approach for synthesizing nanoporous metal particles with a specific geometry.
文献关键词：
中图分类号：
作者姓名：
Jing Deng;Yuan-Yun Zhao;Yong Shen;Chuntao Chang;Qiang Li
作者机构：
School of Physics Science and Technology,Xinjiang University,Urumqi 830046,China;Neutron Scattering Technical Engineering Research Center,School of Mechanical Engineering,Dongguan University of Technology,Dongguan 523808,China;Guangdong-Hong Kong-Macao,Joint Laboratory for Neutron Scattering Science and Technology,Dongguan University of Technology,Dongguan 523808,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
文献出处：
引用格式：
[1]Jing Deng;Yuan-Yun Zhao;Yong Shen;Chuntao Chang;Qiang Li-.Preparation of Flaky Hexagonal Nanoporous Au-Cu and Au Particles via Dealloying)[J].金属学报（英文版）,2022(11):1777-1786
A类：
Flaky,Mg61Cu21Au7Gd11,39+0,MgAu
B类：
Preparation,Hexagonal,Nanoporous,Particles,via,Dealloying,metals,have,attracted,significant,attention,owing,their,excellent,physical,chemical,biological,properties,However,preparing,ultrafine,nanoporous,particles,specific,geometries,remains,challenging,Herein,report,simple,strategy,flaky,hexagonal,dealloying,ribbons,dispersed,metallic,glassy,matrix,were,prepared,size,morphology,precipitated,controlled,by,solidification,process,melt,Ultrafine,diagonal,diameter,pm,ligament,ultrasonic,assisted,HCl,ethanol,HNO3,solutions,respectively,large,surface,area,uniform,shape,implying,that,they,possess,adequate,powder,fluidity,catalytic,Moreover,forma,mechanism,phase,solidified,alloys,was,discussed,This,study,provides,novel,approach,synthesizing,geometry
AB值：
0.448195
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