Nanoporous Pt-Co Alloy Nanowires: Fabrication, Characterization, and Electrocatalytic Properties

被引：365

作者：

Liu, Lifeng ^{[1
]}

Pippel, Eckhard ^{[1
]}

Scholz, Roland ^{[1
]}

Goesele, Ulrich ^{[1
]}

机构：

[1] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany

来源：

NANO LETTERS | 2009年 / 9卷 / 12期

关键词：

MESOPOROUS PLATINUM; POROSITY EVOLUTION; GOLD LEAF; OXIDATION; METALS; CATALYSTS; ARRAYS; COPPER; SILVER; CU;

D O I：

10.1021/nl902619q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nanoporous Pt-Co alloy nanowires were synthesized by electrodeposition of Co-rich Pt1Co99 alloy into anodic aluminum oxide (AAO) membranes, followed by a dealloying treatment in a mild acidic medium. These nanowires consist of porous skeletons with tiny pores of 1-5 nm and crystalline ligaments of 2-8 nm. Morphological and compositional evolutions of the porous Pt-Co nanowires upon dealloying were investigated, and their formation mechanism is discussed. The nanoporous Pt-Co alloy nanowires are found to exhibit distinctly enhanced electrocatalytic activities toward methanol oxidation as compared to the current state-of-the-art PVC and PtCo/C catalysts, thus showing substantial promise as efficient anode electrocatalysts in direct methanol fuel cells.

引用

页码：4352 / 4358

页数：7

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