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Anchoring effect of Ni2+ in stabilizing reduced metallic particles for growing single-walled carbon nanotubes
He, MS; Wang, X; Zhang, LL; Wu, QR; Song, XJ; Chernov, AI; Fedotov, PV; Obraztsova, ED; Sainio, J; Jiang, H; Cui, HZ; Ding, F; Kauppinen, E; He, MS (reprint author), Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266590, Peoples R China.; Ding, F (reprint author), Inst Basic Sci, Ctr Multidimens Carbon Mat, UNIST Gil 50, Ulsan 44919, South Korea.
2018-03-01
发表期刊CARBON
ISSN0008-6223
卷号128页码:249-256
摘要The suitability of the Ni-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 degrees C, Ni-MgO pre-calcined at 600 degrees 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. (c) 2017 Elsevier Ltd. All rights reserved.; The suitability of the Ni-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 degrees C, Ni-MgO pre-calcined at 600 degrees 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. (c) 2017 Elsevier Ltd. All rights reserved.
部门归属[he, maoshuai ; wu, qianru ; song, xiaojie ; cui, hongzhi] shandong univ sci & technol, sch mat sci & engn, qingdao 266590, peoples r china ; [he, maoshuai ; wang, xiao ; ding, feng] inst basic sci, ctr multidimens carbon mat, unist gil 50, ulsan 44919, south korea ; [he, maoshuai] qingdao univ sci & technol, coll chem & mol engn, key lab ecochem engn, minist educ, qingdao 266042, peoples r china ; [zhang, lili] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [chernov, alexander i. ; fedotov, pavel v. ; obraztsova, elena d.] ras, am prokhorov gen phys inst, 38 vavilov st, moscow 119991, russia ; [chernov, alexander i.] natl res nucl univ, mephi moscow engn phys inst, kashirskoe hwy 31, moscow 115409, russia ; [sainio, jani ; jiang, hua ; kauppinen, esko] aalto univ, sch sci, dept appl phys, pob 15100, fi-00076 aalto, finland
关键词Selective Growth Chirality Distributions Bimetallic Catalyst Xps Spectra Co Separation Mo Nanoparticles Spectroscopy Diffraction
学科领域Chemistry, Physical ; Materials Science, Multidisciplinary
资助者Taishan scholarship of climbing plan [tspd20161006]; National High Technology Research and Development Program of China (863 Program) [2015AA034404]; Natural Science Foundation of Shandong Province of China [ZR2016EMM10]; Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents [2016RCJJ001]; CAS Pioneer Hundred Talent Program; Alexander von Humboldt Foundation; [RFBR-16-02-00979]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79476
专题中国科学院金属研究所
通讯作者He, MS (reprint author), Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266590, Peoples R China.; Ding, F (reprint author), Inst Basic Sci, Ctr Multidimens Carbon Mat, UNIST Gil 50, Ulsan 44919, South Korea.
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GB/T 7714
He, MS,Wang, X,Zhang, LL,et al. Anchoring effect of Ni2+ in stabilizing reduced metallic particles for growing single-walled carbon nanotubes[J]. CARBON,2018,128:249-256.
APA He, MS.,Wang, X.,Zhang, LL.,Wu, QR.,Song, XJ.,...&Ding, F .(2018).Anchoring effect of Ni2+ in stabilizing reduced metallic particles for growing single-walled carbon nanotubes.CARBON,128,249-256.
MLA He, MS,et al."Anchoring effect of Ni2+ in stabilizing reduced metallic particles for growing single-walled carbon nanotubes".CARBON 128(2018):249-256.
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