DESIGN, FABRICATION AND CHARACTERIZATION OF NANOSTRUCTURED FIBER ARRAYS FOR FUEL CELL APPLICATIONS
Design, fabrication and characterization of well-aligned porous nanofibers with large electroactive surface areas were performed. Highly ordered nickel-iron alloy nanofiber arrays were fabricated within porous anodic aluminum oxide (AAO) templates via electrodeposition. In order to further increase the electroactive surface area, dealloying was performed to extract the less noble metallic element, iron, from the nickel alloy to form porous structures. Electrocatalytic properties of the nanoar-chitectured porous Ni nanofiber arrays were characterized bycyclic voltammetry (CV). Comparative studies on the electro-chemical activities of the nanoarchitectured porous Ni fiber elec-trode in pure methanol and methanol sulfuric mixture solution were performed. The potential for methanol oxidation is about 0.4 V. It is found that sulfuric acid facilitates the oxidation of methanol. Preliminary studies on the electrocatalytic behavior of the nanoporous nickel in several other solutions containing sugar, orange juice, soy beam juice, tomato sauce were also per-formed. The stress state of the nanofiber in the AAO templates was derived as well.
Yong X. Gan Michelle L. Hyers
Department of Mechanical Engineering The Cooper Union for the Advancement of Science and Art 51 Asto Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge, Massachusetts
国际会议
海南三亚
英文
2007-01-10（万方平台首次上网日期，不代表论文的发表时间）