Stabilized Nanoporous Metals by Dealloying Ternary Alloy Precursors

被引:312
作者
Snyder, Josh [1 ,2 ]
Asanithi, Piyapong [3 ,4 ]
Dalton, Alan B. [3 ,4 ]
Erlebacher, Jonah [1 ,2 ]
机构
[1] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA
[2] Johns Hopkins Univ, Dept Chem & Biomol Engn, Baltimore, MD 21218 USA
[3] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England
[4] Univ Surrey, Surrey Mat Inst, Guildford GU2 7XH, Surrey, England
关键词
D O I
10.1002/adma.200702760
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A small percentage of platinum added to silver/gold alloys that are then electrochemically dealloyed yields an extremely high surface area nanoporous metal, with pore size less than 4 mn, as shown in the figure (scale bar = 5 nm). The presence of surface platinum stabdizes the nanostructure to coarsening in air and electrolyte.
引用
收藏
页码:4883 / +
页数:5
相关论文
共 21 条
[1]  
An KH, 2001, ADV FUNCT MATER, V11, P387, DOI 10.1002/1616-3028(200110)11:5<387::AID-ADFM387>3.0.CO
[2]  
2-G
[3]   Nanoporous gold leaf: "Ancient technology"/advanced material [J].
Ding, Y ;
Kim, YJ ;
Erlebacher, J .
ADVANCED MATERIALS, 2004, 16 (21) :1897-+
[4]   MECHANISM OF SURFACE-DIFFUSION OF GOLD ADATOMS IN CONTACT WITH AN ELECTROLYTIC SOLUTION [J].
DONA, JM ;
GONZALEZVELASCO, J .
JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (18) :4714-4719
[5]   An atomistic description of dealloying - Porosity evolution, the critical potential, and rate-limiting behavior [J].
Erlebacher, J .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (10) :C614-C626
[6]   Evolution of nanoporosity in dealloying [J].
Erlebacher, J ;
Aziz, MJ ;
Karma, A ;
Dimitrov, N ;
Sieradzki, K .
NATURE, 2001, 410 (6827) :450-453
[7]   A kinetic study of vinyl acetate synthesis over Pd-based catalysts:: kinetics of vinyl acetate synthesis over Pd-Au/SiO2 and Pd/SiO2 catalysts [J].
Han, YF ;
Wang, JH ;
Kumar, D ;
Yan, Z ;
Goodman, DW .
JOURNAL OF CATALYSIS, 2005, 232 (02) :467-475
[8]   Template-based synthesis of nanomaterials [J].
Huczko, A .
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2000, 70 (04) :365-376
[9]   Surface-stress induced macroscopic bending of nanoporous gold cantilevers [J].
Kramer, D ;
Viswanath, RN ;
Weissmuller, J .
NANO LETTERS, 2004, 4 (05) :793-796