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首页> 外文会议>ACS National Meeting Exposition >HIGHLY ACTIVE IRON AND NITROGEN DOPED CARBON CATALYST WITH HOLLOW CORE MESOPOROUS SHELL STRUCTURE TOWARD OXYGEN REDUCTION REACTION (ORR)
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HIGHLY ACTIVE IRON AND NITROGEN DOPED CARBON CATALYST WITH HOLLOW CORE MESOPOROUS SHELL STRUCTURE TOWARD OXYGEN REDUCTION REACTION (ORR)

机译：具有中空核心介孔的高活性铁和氮掺杂碳催化剂朝向氧还原反应（ORR）

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Proton-exchange membrane fuel cells (PEMFCs) have attracted much interest due to their high energy efficiency. To date, platinum (Pt) and Pt alloys are the most widely used cathode catalysts for ORR. However, Pt and Pt alloys have hampered the commercial applications of PEMFCs due to their high costs and scarcity. Low cost alternative electrochemical catalysts which exhibit high activity and durability for ORR should be developed. Among these, nonprecious metals, especially iron and cobalt, and nitrogen doped carbons have drawn much attention due to their excellent electrochemical activity toward ORR. Meanwhile, the morphologies and porous structures of these nitrogen doped carbons are rarely controllable. In order to introduce porous structure and increase the specific surface area, both of which are believed to promote the mass transport and accessibility of active sites for ORR, zeolitic imidazolate framework (ZIF), SBA-15 and silica colloid are used as hard template to prepare the ORR catalysts. Nevertheless, their enhancement of porosity and surface area are rather limited.
机译：由于其高能量效率，质子交换膜燃料电池（PEMFC）引起了很多兴趣。迄今为止，铂（Pt）和Pt合金是用于ORR的最广泛使用的阴极催化剂。然而，由于其高成本和稀缺性，Pt和Pt合金阻碍了PEMFC的商业应用。应开发出表现出高活性和耐久性的低成本替代电化学催化剂。其中，非匮乏的金属，尤其是铁和钴，并且由于它们对ORR的优异电化学活性而引起了氮掺杂的碳。同时，这些氮掺杂碳的形态和多孔结构很少可控。为了引入多孔结构并增加特定表面积，两者都被认为促进了ORR，沸石咪唑酯骨架（ZIF），SBA-15和二氧化硅胶体的活性位点的质量输送和可达性用作硬模板准备ORR催化剂。然而，它们的孔隙率和表面积增强是有限的。

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