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首页> 外文会议>2018年第79回応用物理学会秋季学術講演会講演予稿集 >Metal organic framework (MOF) derivedencapsulated N-doped graphene hybrid as efficient multifunctional catalyst
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Metal organic framework (MOF) derivedencapsulated N-doped graphene hybrid as efficient multifunctional catalyst

机译：金属有机骨架（MOF）衍生的N掺杂石墨烯杂化材料作为高效多功能催化剂

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Pt is know to be the state-of-the-art catalyst for oxygen reduction reaction (ORR) as well as for hydrogen evolution reaction (HER) which can also be used for the hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). Quest is on to find a suitable catalyst that can replace Pt to circumvent the problem associated with it. Here, wedemonsrateda facile and green strategy to fabricate a novel non-precious nanoalloyencapsulated in N-doped graphene layers (Co_xFe_(1-x)/N-G)by pyrolysisof metal organic framwork (MOF)and their catalytic activity towards ORR, HER and hydrogenation of 4-NP(Scheme 1). Intensive studies have been carried out to elucidate the role of alloying and N-doping. Interestingly, the activity is found to be dependent on the amount of Co in CoFe core and N doping in graphene layers for all catalytic activity. Similar onset potential with better current density as compared to the benchmark precious Pt/C catalyst in alkaline medium, have been achieved towards ORR activity. Theyalso show efficient and highly stable HER activity and very efficient and magentcially seperable catalyst towards hydrogenation of 4-NP to 4-AP. Overall,the non-precious nanostructurescan be exploited as multi-functional catalysts in fuel cells, hydrogen storage systems and waste water-treatment instead of the expensive Pt catalysts.
机译：铂是已知的用于氧还原反应（ORR）和用于氢气释放反应（HER）的最先进催化剂，也可用于将4-硝基苯酚（4-NP）加氢成4 -氨基苯酚（4-AP）。寻求寻找一种合适的催化剂来替代Pt来解决与之相关的问题。在这里，我们采用了一种简便而又绿色的策略，即通过金属有机框架（MOF）的热解及其对ORR，HER和加氢的催化活性，制备一种新型的非贵金属纳米包封在N掺杂石墨烯层（Co_xFe_（1-x）/ NG）中的非贵金属。 4-NP（方案1）。已经进行了深入的研究以阐明合金化和N掺杂的作用。有趣的是，发现对于所有催化活性，活性均取决于CoFe芯中Co的量和石墨烯层中的N掺杂。与碱性介质中的基准贵重Pt / C催化剂相比，在ORR活性方面具有相似的起始电势和更好的电流密度。它们还显示出有效和高度稳定的HER活性，以及​​非常有效和可分离的催化剂，可将4-NP氢化为4-AP。总体而言，可以将非贵重的纳米结构用作昂贵的Pt催化剂，用作燃料电池，储氢系统和废水处理中的多功能催化剂。

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    Barun Kumar Barman; Tadaaki Nagao; Karuna Kar Nanda;

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    Materials Research Centre, Indian Institute of Science (IISc), Bangalore, India,International Center for Materials Nanoarchitectonics (MANA), NationalInstitute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan,BARMAN.Kumarbarun@nims.go.jp;

    International Center for Materials Nanoarchitectonics (MANA), NationalInstitute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan,CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan;

    Materials Research Centre, Indian Institute of Science (IISc), Bangalore, India;

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