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Mesoporous-Silica Induced Doped Carbon Nanotubes Growth From Metal-Organic Frameworks


Carbon materials, with controllable structure, derived from metal-organic frameworks (MOFs) have been emerged as a new class of electrocatalysts in renewable energy devices. However, efficient conversion of MOF 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 medium. This novel strategy opens a new avenue for the synthesis of Co/N-CNTs with great promise for developing high performance and cheap electrocatalysts.

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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, Accepted Manuscript
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    Mesoporous-Silica Induced Doped Carbon Nanotubes 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, Accepted Manuscript , DOI: 10.1039/C8NR00137E

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