Fabrication of nanoporous GeOx supported Ag nanoparticle composite by dealloying of (Al0.6Ge0.3Mn0.1)98Ag2 amorphous alloy

•As-melt-spun (Al0.6Ge0.3Mn0.1)98Ag2 alloy consists of Ag3Al intermetallic compound embedded in amorphous matrix.•Nanoporous GeOx supported Ag nanoparticle composite was fabricated by one-step dealloying process.•By dealloying of amorphous alloy precursor, complex nanoporous composite structure can...

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Published inCorrosion science Vol. 126; pp. 381 - 384
Main Authors Kim, K.C., Na, M.Y., Kim, W.T., Kim, D.H.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Ltd 01.09.2017
Elsevier BV
Subjects
A. Alloy
Aluminum base alloys
Amorphous alloys
B. TEM
C. De-alloying
Dealloying
Germanium oxides
Manganese
Melt spinning
Metallic glasses
Nanoparticles
Silver
Transmission electron microscopy
A. Alloy
C. De-alloying
B. TEM
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Summary:•As-melt-spun (Al0.6Ge0.3Mn0.1)98Ag2 alloy consists of Ag3Al intermetallic compound embedded in amorphous matrix.•Nanoporous GeOx supported Ag nanoparticle composite was fabricated by one-step dealloying process.•By dealloying of amorphous alloy precursor, complex nanoporous composite structure can be easily obtained. The present study shows that nanoporous GeOx supported Ag nanoparticle composite can be fabricated by one-pot dealloying of (Al0.6Ge0.3Mn0.1)98Ag2 amorphous alloy. As-melt-spun (Al0.6Ge0.3Mn0.1)98Ag2 precursor alloy consists of Ag3Al nanoparticles embedded in the amorphous matrix. Immersion of precursor alloy in 5wt% HCl solution leads to simultaneous dealloying of amorphous matrix and Ag3Al nanoparticles. After dealloying process, Al and Mn atoms are almost completely dissolved out from the precursor alloy, forming a composite nanoporous structure consisting of Ag nanoparticles dispersed on nanoporous GeOx.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2017.06.022