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Issue 13, 2018
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Mesoporous-silica induced doped carbon nanotube growth from metal–organic frameworks

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Abstract

Carbon materials, with a controllable structure, derived from metal–organic frameworks (MOFs) have emerged as a new class of electrocatalysts in renewable energy devices. However, efficient conversion of MOFs to small diameter doped carbon nanotubes in inert gases at high temperatures (>600 °C) remains a significant challenge. In this study, we first report the growth of small diameter cobalt and nitrogen co-doped carbon nanotubes (Co/N-CNTs) from mesoporous silica (mSiO2)-coated Co-based MOFs (ZIF-67). The presence of a layer of mSiO2 outside the ZIF-67 nanocrystals prevents the Co nanocatalysts from quick aggregation, and significantly serves as a unique ‘sieve’ for inducing the catalytic growth of CNTs during pyrolysis. The obtained Co/N-CNTs, with ∼13 nm diameter evolved from the pristine MOF architecture, exhibit higher catalytic activity and stability for oxygen reduction than commercial Pt/C electrocatalysts in alkaline media. This novel strategy opens a new avenue for the synthesis of Co/N-CNTs with great promise for developing high performance and cheap electrocatalysts.

Graphical abstract: Mesoporous-silica induced doped carbon nanotube growth from metal–organic frameworks

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Publication details

The article was received on 06 Jan 2018, accepted on 22 Feb 2018 and first published on 22 Feb 2018


Article type: Paper
DOI: 10.1039/C8NR00137E
Citation: Nanoscale, 2018,10, 6147-6154
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    Mesoporous-silica induced doped carbon nanotube growth from metal–organic frameworks

    H. Zhou, D. He, A. I. Saana, J. Yang, Z. Wang, J. Zhang, Q. Liang, S. Yuan, J. Zhu and S. Mu, Nanoscale, 2018, 10, 6147
    DOI: 10.1039/C8NR00137E

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