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首页> 外文期刊>International Journal of Electrochemical Science >Nitrogen-doped Bimetallic Carbon Nanosheets as Efficient Electrocatalysts for Oxygen Reduction Reaction
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Nitrogen-doped Bimetallic Carbon Nanosheets as Efficient Electrocatalysts for Oxygen Reduction Reaction

机译：氮掺杂双金属碳纳米片作为氧还原反应的有效电催化剂

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摘要

The research and development of high activity, low cost and high stability non-noble metal oxygen reduction electrocatalyst is very important to promote the commercial development of fuel cell. In this paper, cheap sucrose and urea is used as the raw materials to preparation a multi-pore nitrogen-doped carbon nanosheet coated ferro and cobalt binary metal nanoparticle composite (GNCN-FeCo) by simple pyrolysis. The GNCN-FeCo showed better oxygen reduction reaction （ORR ）catalytic activity than commercial Pt/C in alkaline media, benefit from multi-pore structure and FeCo-Nx active center. GNCN-FeCo has the same onset potential as Pt/C and much better half-wave potential (positive about 70 mV compared to commercial Pt/C), and the reaction process is a 4-electron transfer process (n≈4); Moreover, its onest potential is quiet close to that of Pt/C catalyst in acidic medium, and its half-wave potential is only negative about 20 mV in comparison with Pt/C. Meanwhile, GNCN-FeCo displays excellent methanol resistance in 0.5 M H2SO4 and 0.1 M KOH. These results indicate that GNCN-FeCo may have the potential to replace the Pt/C catalyst as an efficient ORR catalyst.
机译：高活性，低成本和高稳定性非贵金属氧还原电催化剂的研究和开发对于促进燃料电池的商业发展非常重要。本文用简单的热解用作制备多孔氮掺杂碳纳米片涂覆的铁霉和钴二元金属纳米颗粒复合物（GNCN-FECO）的廉价蔗糖和尿素。 GNCN-FECO显示出比碱性介质的商业Pt / C更好的氧还原反应（ORR）催化活性，受益于多孔结构和FECO-NX Active Center。 GNCN-FECO与Pt / C的发病势相同，并且与商业Pt / c相比，阳性约70mV的阳性约70mV），反应过程是4-电子转移过程（n≈4）;此外，其在酸性培养基中的靠近Pt / C催化剂的最佳电位是安静的，并且其半波电位与Pt / c相比仅为20mV。同时，GNCN-FECO在0.5M H 2 SO 4和0.1M KOH中显示出优异的甲醇抗性。这些结果表明GNCN-FECO可能具有替代PT / C催化剂作为高效ORR催化剂的潜力。

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