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Metallo-supramolecular polymers engineered porous carbon frameworks encapsulated stable ultra-small nanoparticles: a general approach to construct highly dispersed catalysts

Abstract

The development of a general approach to fabricating stable ultra-small heterogeneous nanocatalysts has been intensively pursued. However, issues related to complex synthesis processes and structure stability have restricts their investigation and application. Here we report a facile organometallics conjunction strategy for the large-scale fabrication of porous carbon frameworks encapsulated highly dispersed sub-3 nm ultra-small nanoparticles (USMNPs@PCF). The methodology is based on the convenient aldol condensation reaction to manufacture the metallo-supramolecular polymer precursor, then a consequent annealing to forms the target nanocomposite. This technique was successfully applied to the preparation of varieties of USMNPs@PCF, including Fe, Co, Ni, Mo, Ru, Rh, Pd and Pt. As a representative application, the PCF encapsulated sub-3 nm Pd nanoparticles demonstrated remarkably durability and efficiency for chemoselective hydrogenation of nitroarenes to the corresponding anilines under ambient condition with low catalyst loading. All hydrogenation reactions can complete in 4 min with >99% conversion and >99% chemoselectivity. The turnover frequency (TOF) was up to 11400 h-1 for p-nitrophenol. This work provides a general, scalable and economical route to the manufacture of sub-3 nm and highly dispersed nanocomposites, which can be used in many other important fields, such as electrochemistry, energy science and environmental protection.

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Publication details

The article was received on 06 Jun 2018, accepted on 25 Jul 2018 and first published on 28 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA05369C
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Metallo-supramolecular polymers engineered porous carbon frameworks encapsulated stable ultra-small nanoparticles: a general approach to construct highly dispersed catalysts

    Y. Ai, M. He, F. Zhang, Y. Long, Y. Li, Q. Han, H. Sun, M. Ding and Q. Liang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA05369C

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