包裹在 N、S-掺杂介孔荚状碳纳米管中的高能 MOF 源 Fe3C 纳米粒子用于高效氧气还原反应

IF 5.8 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Nanoscale Pub Date : 2024-12-18 DOI:10.1039/D4NR04004J
Yang Liu, Xinde Duan, Fayuan Ge, Tingting Wu and Hegen Zheng
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引用次数: 0

摘要

合理设计高级氧还原反应(ORR)催化剂是提高能量转换装置性能的关键。然而,如何构建具有层次结构的微/介孔/大孔纳米结构,特别是介孔输运通道,以提高催化剂的催化性能仍然是一个巨大的挑战。本文利用高能金属有机骨架(EMOFs)在高温热解过程中产生大量气体的特性,制备了一种独特的四氮基EMOFs衍生电催化剂(表示为Fe3C@NSC-900),该催化剂由高度分散的Fe3C纳米颗粒和N, s共掺杂的介孔碳纳米管组成。介孔为主的核壳结构使Fe3C@NSC-900具有优异的催化活性和高效的传质性能。因此,最优Fe3C@NSC-900具有0.922 V的高半波电位,在0.1 M KOH下具有很高的稳定性,优于商业Pt/C和大多数报道的ORR催化剂。据我们所知,这项工作是四氮基EMOF衍生物在电催化ORR中的首次应用,并有望为EMOF在新一代催化剂设计中的潜力提供一些建设性的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Energetic MOF-derived Fe3C nanoparticles encased in N,S-codoped mesoporous pod-like carbon nanotubes for efficient oxygen reduction reaction†

Energetic MOF-derived Fe3C nanoparticles encased in N,S-codoped mesoporous pod-like carbon nanotubes for efficient oxygen reduction reaction†

The rational design of advanced oxygen reduction reaction (ORR) catalysts is essential to improve the performance of energy conversion devices. However, it remains a huge challenge to construct hierarchical micro-/meso-/macroporous nanostructures, especially mesoporous transport channels in catalysts, to enhance catalytic capability. Herein, motivated by the characteristics of energetic metal–organic frameworks (EMOFs) that produce an abundance of gases during high-temperature pyrolysis, we prepared a unique tetrazine-based EMOF-derived electrocatalyst (denoted as Fe3C@NSC-900) consisting of highly dispersed Fe3C nanoparticles and N,S-codoped mesoporous carbon nanotubes. The mesopore-dominated core–shell structure endows Fe3C@NSC-900 with excellent catalytic activity and efficient mass transfer. Thus, optimal Fe3C@NSC-900 demonstrates a high half-wave potential of 0.922 V and great stability in 0.1 M KOH, outperforming commercial Pt/C and most of the reported ORR catalysts. As far as we know, this work is the first application of a tetrazine-based EMOF derivative for the electrocatalytic ORR and is expected to offer some constructive insights into potential of EMOFs for new-generation catalyst design.

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来源期刊
Nanoscale
Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
12.10
自引率
3.00%
发文量
1628
审稿时长
1.6 months
期刊介绍: Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.
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