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首页> 外文期刊>Nanotechnology >Convenient immobilization of Pt-Sn bimetallic catalysts on nitrogen-doped carbon nanotubes for direct alcohol electrocatalytic oxidation
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Convenient immobilization of Pt-Sn bimetallic catalysts on nitrogen-doped carbon nanotubes for direct alcohol electrocatalytic oxidation

机译：将Pt-Sn双金属催化剂方便地固定在氮掺杂的碳纳米管上以进行直接醇电催化氧化

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摘要

Pt-Sn alloy nanoparticles were conveniently immobilized on nitrogen-doped carbon nanotubes (NCNTs) through microwave-assisted ethylene glycol reduction. The nanoparticles have a narrow particle size distribution with the average particle size around 3nm as measured by transmission electron microscopy and x-ray diffraction. The binding energy of metallic Sn passively shifts due to the charge transfer from Sn to Pt, as revealed by x-ray photoelectron spectroscopy. In comparison with the commercial Pt/C catalyst, Pt/NCNT presents a clear increase in activity for alcohol electro-oxidation due to the improved support, while the bimetallic Pt-Sn/NCNT has even higher activity owing to the alloying of Pt with Sn. Both Pt-Sn/NCNT and Pt/NCNT catalysts exhibit competitive long-term stability to Pt/C catalyst. The low cost, simple preparation and superior electrocatalytic performance indicate the great potential of Pt-Sn/NCNT in direct alcohol fuel cells.
机译：Pt-Sn合金纳米颗粒可通过微波辅助的乙二醇还原反应方便地固定在氮掺杂的碳纳米管（NCNT）上。纳米颗粒具有窄的粒度分布，如通过透射电子显微镜和X射线衍射所测量的，其平均粒度为约3nm。 X射线光电子能谱显示，由于电荷从Sn转移到Pt，金属Sn的结合能被动转移。与商用Pt / C催化剂相比，Pt / NCNT由于载体的改进而明显提高了醇电氧化活性，而双金属Pt-Sn / NCNT由于Pt与Sn的合金化而具有更高的活性。 。 Pt-Sn / NCNT和Pt / NCNT催化剂都显示出与Pt / C催化剂竞争的长期稳定性。低成本，简单的制备和优异的电催化性能表明Pt-Sn / NCNT在直接酒精燃料电池中具有巨大的潜力。

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