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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Pt-Ru/Carbon Fiber Nanocomposites: Synthesis, Characterization, and Performance as Anode Catalysts of Direct Methanol Fuel Cells. A Search for Exceptional Performance
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Pt-Ru/Carbon Fiber Nanocomposites: Synthesis, Characterization, and Performance as Anode Catalysts of Direct Methanol Fuel Cells. A Search for Exceptional Performance

机译:Pt-Ru /碳纤维纳米复合材料:直接甲醇燃料电池的阳极催化剂的合成,表征和性能。追求卓越性能

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摘要

Six Pt-Ru/carbon fiber nanocomposites have been prepared by using a bimetallic precursor as a source of metal. Carbon fiber supports include singled-walled nanotubes, multiwalled nanotubes, or graphitic carbon nanofibers having either platelet, wide herringbone, or narrow tubular herringbone atomic structures. Preparative procedures have been optimized to enhance the performance of these nanocomposites as anode electrocatalysts in direct methanol fuel cells. Pt-Ru nanoparticles are the major metal-containing component of these nanocomposites along with variable amounts of Ru metal. A range of direct methanol fuel cell performance is observed with a Pt-Ruarrow tubular herringbone graphitic carbon nanofiber nanocomposite showing the highest performance. This performance is equivalent to that recorded for an unsupported Pt-Ru colloid at an anode catalyst loading of 2.7 mg total metal/cm~2, but 64% greater than that of the unsupported Pt-Ru colloid at a lower catalyst loading of 1.5 mg/cm~2.
机译:通过使用双金属前驱体作为金属源,已经制备了六种Pt-Ru /碳纤维纳米复合材料。碳纤维载体包括具有血小板,宽人字形或窄管状人字形原子结构的单壁纳米管,多壁纳米管或石墨碳纳米纤维。已经优化了制备程序,以增强这些纳米复合材料在直接甲醇燃料电池中作为阳极电催化剂的性能。 Pt-Ru纳米颗粒是这些纳米复合材料中主要的含金属组分,并且金属含量可变。观察到一系列直接甲醇燃料电池的性能,其中Pt-Ru /窄管人字形石墨碳纳米纤维纳米复合材料表现出最高的性能。该性能与阳极金属负载量为2.7 mg总金属/ cm〜2时无负载Pt-Ru胶体记录的性能相同,但在较低的催化剂负载量为1.5 mg时比无负载的Pt-Ru胶体记录的性能高64%。 /厘米〜2。

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