Anchoring effect of Ni2+ in stabilizing reduced metallic particles for growing single-walled carbon nanotubes

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Anchoring effect of Ni2+ in stabilizing reduced metallic particles for growing single-walled carbon nanotubes. / He, Maoshuai; Wang, Xiao; Zhang, Lili; Wu, Qianru; Song, Xiaojie; Chernov, Alexander I.; Fedotov, Pavel V.; Obraztsova, Elena D.; Sainio, Jani; Jiang, Hua; Cui, Hongzhi; Ding, Feng; Kauppinen, Esko.

In: Carbon, Vol. 128, 01.03.2018, p. 249-256.

Research output: Contribution to journalArticleScientificpeer-review

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He, M, Wang, X, Zhang, L, Wu, Q, Song, X, Chernov, AI, Fedotov, PV, Obraztsova, ED, Sainio, J, Jiang, H, Cui, H, Ding, F & Kauppinen, E 2018, 'Anchoring effect of Ni2+ in stabilizing reduced metallic particles for growing single-walled carbon nanotubes' Carbon, vol. 128, pp. 249-256. https://doi.org/10.1016/j.carbon.2017.11.093

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He, Maoshuai ; Wang, Xiao ; Zhang, Lili ; Wu, Qianru ; Song, Xiaojie ; Chernov, Alexander I. ; Fedotov, Pavel V. ; Obraztsova, Elena D. ; Sainio, Jani ; Jiang, Hua ; Cui, Hongzhi ; Ding, Feng ; Kauppinen, Esko. / Anchoring effect of Ni2+ in stabilizing reduced metallic particles for growing single-walled carbon nanotubes. In: Carbon. 2018 ; Vol. 128. pp. 249-256.

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@article{ea798a75fc6a4cbd9029fbcbbf5e9d1a,
title = "Anchoring effect of Ni2+ in stabilizing reduced metallic particles for growing single-walled carbon nanotubes",
abstract = "The suitability of the Ni[sbnd]MgO catalyst as a catalyst in chiral-selective growth of single-walled carbon nanotubes (SWNTs) by chemical vapor deposition has been assessed. It reveals that catalyst calcination temperature plays an important role in affecting the catalyst performances. Using CO as the carbon precursor and a chemical vapor deposition reaction temperature of 600 °C, Ni[sbnd]MgO pre-calcined at 600 °C demonstrates the best performances in catalyzing the growth of SWNTs with predominant (6, 5) species. Systematic characterizations on catalysts calcinated at different temperatures indicate that Ni2+ ions diffuse towards the interior of MgO matrix upon annealing. DFT-based calculations reveal that the binding energy between Ni2+ and adjacent Ni(0) is larger than that between Mg2+ and Ni (0), while Ni2+ situated deep inside MgO has weak interactions with surface Ni atoms. This work highlights the importance of subsurface Ni2+ in anchoring reduced surface Ni atom, which inhibits the aggregation of Ni particles and therefore, facilitates the growth of SWNTs with a narrow chirality distribution.",
keywords = "Anchoring effect, Catalyst, Chirality selective, Reduction temperature, Single-walled carbon nanotube, Solid solution",
author = "Maoshuai He and Xiao Wang and Lili Zhang and Qianru Wu and Xiaojie Song and Chernov, {Alexander I.} and Fedotov, {Pavel V.} and Obraztsova, {Elena D.} and Jani Sainio and Hua Jiang and Hongzhi Cui and Feng Ding and Esko Kauppinen",
year = "2018",
month = "3",
day = "1",
doi = "10.1016/j.carbon.2017.11.093",
language = "English",
volume = "128",
pages = "249--256",
journal = "Carbon",
issn = "0008-6223",

}

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TY - JOUR

T1 - Anchoring effect of Ni2+ in stabilizing reduced metallic particles for growing single-walled carbon nanotubes

AU - He, Maoshuai

AU - Wang, Xiao

AU - Zhang, Lili

AU - Wu, Qianru

AU - Song, Xiaojie

AU - Chernov, Alexander I.

AU - Fedotov, Pavel V.

AU - Obraztsova, Elena D.

AU - Sainio, Jani

AU - Jiang, Hua

AU - Cui, Hongzhi

AU - Ding, Feng

AU - Kauppinen, Esko

PY - 2018/3/1

Y1 - 2018/3/1

N2 - The suitability of the Ni[sbnd]MgO catalyst as a catalyst in chiral-selective growth of single-walled carbon nanotubes (SWNTs) by chemical vapor deposition has been assessed. It reveals that catalyst calcination temperature plays an important role in affecting the catalyst performances. Using CO as the carbon precursor and a chemical vapor deposition reaction temperature of 600 °C, Ni[sbnd]MgO pre-calcined at 600 °C demonstrates the best performances in catalyzing the growth of SWNTs with predominant (6, 5) species. Systematic characterizations on catalysts calcinated at different temperatures indicate that Ni2+ ions diffuse towards the interior of MgO matrix upon annealing. DFT-based calculations reveal that the binding energy between Ni2+ and adjacent Ni(0) is larger than that between Mg2+ and Ni (0), while Ni2+ situated deep inside MgO has weak interactions with surface Ni atoms. This work highlights the importance of subsurface Ni2+ in anchoring reduced surface Ni atom, which inhibits the aggregation of Ni particles and therefore, facilitates the growth of SWNTs with a narrow chirality distribution.

AB - The suitability of the Ni[sbnd]MgO catalyst as a catalyst in chiral-selective growth of single-walled carbon nanotubes (SWNTs) by chemical vapor deposition has been assessed. It reveals that catalyst calcination temperature plays an important role in affecting the catalyst performances. Using CO as the carbon precursor and a chemical vapor deposition reaction temperature of 600 °C, Ni[sbnd]MgO pre-calcined at 600 °C demonstrates the best performances in catalyzing the growth of SWNTs with predominant (6, 5) species. Systematic characterizations on catalysts calcinated at different temperatures indicate that Ni2+ ions diffuse towards the interior of MgO matrix upon annealing. DFT-based calculations reveal that the binding energy between Ni2+ and adjacent Ni(0) is larger than that between Mg2+ and Ni (0), while Ni2+ situated deep inside MgO has weak interactions with surface Ni atoms. This work highlights the importance of subsurface Ni2+ in anchoring reduced surface Ni atom, which inhibits the aggregation of Ni particles and therefore, facilitates the growth of SWNTs with a narrow chirality distribution.

KW - Anchoring effect

KW - Catalyst

KW - Chirality selective

KW - Reduction temperature

KW - Single-walled carbon nanotube

KW - Solid solution

UR - http://www.scopus.com/inward/record.url?scp=85036461188&partnerID=8YFLogxK

U2 - 10.1016/j.carbon.2017.11.093

DO - 10.1016/j.carbon.2017.11.093

M3 - Article

VL - 128

SP - 249

EP - 256

JO - Carbon

JF - Carbon

SN - 0008-6223

ER -

ID: 16608943