Nanoporous pt-co alloy nanowires: fabrication, characterization, and electrocatalytic properties.
Nanoporous Pt-Co alloy nanowires were synthesized by electrodeposition of Co-rich Pt(1)Co(99) 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 Pt/C and PtCo/C catalysts, thus showing substantial promise as efficient anode electrocatalysts in direct methanol fuel cells.
Max Planck Institute of Microstructure Physics, Weinberg 2, D06120 Halle, Germany.
Lifeng
L
Liu
Eckhard
E
Pippel
Roland
R
Scholz
Ulrich
U
Gösele
D000497:Alloys / Q000737:chemistry; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D004563:Electrochemistry / Q000379:methods*; D007854:Lead / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D000432:Methanol / Q000737:chemistry*; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D010084:Oxidation-Reduction; D010316:Particle Size; D016062:Porosity; D013499:Surface Properties
D000497:Alloys; D046911:Macromolecular Substances; D007854:Lead; D003035:Cobalt; D000432:Methanol