SHAPE SELECTIVE NANO-CATALYSTS [electronic resource] : TOWARD DIRECT METHANOL FUEL CELLS APPLICATIONS

• Ngôn ngữ: eng
• Ký hiệu phân loại: 660.6 Biotechnology
• Thông tin xuất bản: Aiken, S.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Savannah River Site ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2010
• Mô tả vật lý: Medium: ED : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 256986
• Chủ đề: 1. 30 direct energy conversion; 2. Air; 3. Ascorbic acid; 4. Aspect ratio; 5. Atomic force microscopy; 6. Bromides; 7. Direct methanol fuel cells; 8. Electron microscopy; 9. Et al; 10. Gold; 11. Membranes

Tóm tắt

A series of bimetallic core-shell-alloy type Au-Pt nanomaterials with various morphologies, aspect ratios and compositions, were produced in a heterogenous epitaxial fashion. Gold nanoparticles with well-controlled particle size and shape, e.g. spheres, rods and cubes, were used as 'seeds' for platinum growth in the presence of a mild reducing agent, ascorbic acid and a cationic surfactant cethyltrimethyl ammonium bromide (CTAB). The reactions take place in air and water, and are quick, economical and amenable for scaling up. The synthesized nanocatalysts were characterized by electron microscopy techniques and energy dispersive X-ray analysis. Nafion membranes were embedded with the Au-Pt nanomaterials and analyzed by atomic force microscopy (AFM) and scanning electron microscopy (SEM) for their potential in direct methanol fuel cells applications.