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首页> 外文期刊>Advanced Functional Materials >Zn-MOF-74 Derived N-Doped Mesoporous Carbon as pH-Universal Electrocatalyst for Oxygen Reduction Reaction
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Zn-MOF-74 Derived N-Doped Mesoporous Carbon as pH-Universal Electrocatalyst for Oxygen Reduction Reaction

机译：Zn-MOF-74衍生的N掺杂介孔碳作为pH通用的氧还原反应电催化剂

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摘要

It is of increasing importance to explore new low-cost and high-activity electrocatalysts for oxygen reduction reaction (ORR), which have had a substantial impact across a diverse range of energy conversion system, including various fuel cell and metal-air batteries. Although engineering carbon nanostructures have been widely explored as a candidate class of Pt-based ORR electrocatalysts owing to their proved high activity, outstanding stability, and ease of use, there still remains a daunting challenge to develop high activity metal-free electrocatalysts in pH-universal electrolyte system. Here, a reliable and controllable route amenable to prepare nitrogen-doped porous carbon (NPC) with high yields and exceptional quality is described. The as-prepared NPC shows advantages of high activity, high durability, and methanol-tolerant as an efficient pH-universal electrocatalyst for ORR, showing comparable or even better activity as compared with the commercial Pt/C catalysts not only in alkaline media but also in acidic and neutral electrolyte. Systematic electrochemical studies, combining with density functional theory calculation, demonstrate the unique nitrogen-doping species and favorable pores in the as-designed NPC synergistically contribute to the significantly improved catalytic activity in pH-universal medium. The present work potentially presents an important breakthrough in developing ORR electrocatalysts for various fuel cells.
机译：探索用于氧气还原反应（ORR）的新型低成本，高活性电催化剂越来越重要，该催化剂已在包括各种燃料电池和金属空气电池在内的各种能源转换系统中产生了重大影响。尽管工程碳纳米结构因其高活性，出色的稳定性和易用性而被广泛用作Pt基ORR电催化剂的候选类别，但在pH-条件下开发高活性无金属电催化剂仍然是一项艰巨的挑战。通用电解质系统。在此，描述了一种可靠且可控制的路线，该路线适合于以高收率和优异的质量制备掺氮多孔碳（NPC）。制备的NPC具有高活性，高耐久性和耐甲醇性的优点，可作为ORR的高效pH通用电催化剂，不仅在碱性介质中，而且与市售Pt / C催化剂相比，都具有可比甚至更好的活性。在酸性和中性电解液中。系统的电化学研究与密度泛函理论计算相结合，证明了设计的NPC中独特的氮掺杂物质和有利的孔协同作用，有助于显着提高pH通用介质中的催化活性。本工作潜在地提出了在开发用于各种燃料电池的ORR电催化剂方面的重要突破。

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  • 来源
    《Advanced Functional Materials》 |2017年第14期|1606190.1-1606190.8|共8页
  • 作者

    Ye Lin; Chai Guoliang; Wen Zhenhai;

  • 作者单位

    Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China|Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, Fuzhou 350002, Fujian, Peoples R China;

    Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China;

    Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China|Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, Fuzhou 350002, Fujian, Peoples R China;

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