Porous Iron–Cobalt Alloy/Nitrogen‐Doped Carbon Cages Synthesized via Pyrolysis of Complex Metal–Organic Framework Hybrids for Oxygen Reduction,Advanced Functional Materials

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Porous Iron–Cobalt Alloy/Nitrogen‐Doped Carbon Cages Synthesized via Pyrolysis of Complex Metal–Organic Framework Hybrids for Oxygen Reduction
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2018-01-10 , DOI: 10.1002/adfm.201706738
Bu Yuan Guan ₁ , Yan Lu ₁ , Yong Wang ₂ , Minghong Wu ₂ , Xiong Wen David Lou ₁

Affiliation

Efficient and stable nonprecious metal electrocatalysts for oxygen reduction are of great significance in some important electrochemical energy storage and conversion systems. As a unique class of porous hybrid materials, metal–organic frameworks (MOFs) and their composites are recently considered as promising precursors to derive advanced functional materials with controlled structures and compositions. Here, an “MOF‐in‐MOF hybrid” confined pyrolysis strategy is developed for the synthesis of porous Fe–Co alloy/N‐doped carbon cages. A unique “MOF‐in‐MOF hybrid” architecture constructed from a Zn‐based MOF core and a Co‐based MOF hybrid shell encapsulated with FeOOH nanorods is first prepared, followed by a pyrolysis process to obtain a cage‐shaped hybrid material consisting of Fe–Co alloy nanocrystallites evenly distributed inside a porous N‐doped carbon microshell. Of note, this strategy can be extended to synthesize many other multifunctional “nanosubstrate‐in‐MOF hybrid” core–shelled structures. Benefiting from the structural and compositional advantages, the as‐derived hybrid cages exhibit superior electrocatalytic performance for the oxygen reduction reaction in alkaline solution. The present approach may provide some insight in design and synthesis of complex MOF hybrid structures and their derived functional materials for energy storage and conversion applications.

中文翻译：

通过复杂的金属-有机骨架杂化物的热解合成多孔的铁-钴合金/氮掺杂碳笼

在某些重要的电化学能量存储和转化系统中，用于氧还原的高效稳定的非贵金属电催化剂具有重要意义。作为一类独特的多孔杂化材料，金属有机骨架（MOF）及其复合材料最近被认为是有前途的前体，可以衍生出具有受控结构和成分的先进功能材料。在这里，开发了一种“ MOF-in-MOF混合”密闭热解策略，用于合成多孔Fe-Co合金/ N掺杂碳笼。首先准备了一种独特的“ MOF-in-MOF混合”架构，该架构是由基于FeOOH纳米棒封装的基于Zn的MOF核和基于Co的MOF混合壳构成的，然后进行热解工艺，得到笼形混合材料，该混合材料由均匀分布在掺氮碳微壳中的Fe-Co合金纳米微晶组成。值得注意的是，该策略可以扩展为合成许多其他多功能的“ MOF纳米基板杂化”核壳结构。得益于结构和组成方面的优势，衍生的混合笼对碱性溶液中的氧还原反应表现出优异的电催化性能。本方法可以为能量存储和转换应用的复杂MOF混合结构及其派生的功能材料的设计和合成提供一些见识。得益于结构和组成方面的优势，衍生的混合笼对碱性溶液中的氧还原反应表现出优异的电催化性能。本方法可以为能量存储和转换应用的复杂MOF混合结构及其派生的功能材料的设计和合成提供一些见识。得益于结构和组成上的优势，衍生的混合笼对碱性溶液中的氧还原反应表现出优异的电催化性能。本方法可以为能量存储和转换应用的复杂MOF混合结构及其派生的功能材料的设计和合成提供一些见识。

更新日期：2018-01-10

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