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Atomic scale investigations of catalyst and catalytic graphitization in a silicon and titanium doped graphite
Lin, QingYun; Feng, Zhihai; Liu, ZhanJun; Guo, QuanGui; Hu, ZiJun; He, LianLong; Ye, HengQiang; llhe@imr.ac.cn
2015
Source PublicationCARBON
ISSN0008-6223
Volume88Pages:252-261
AbstractThe catalysts and catalytic graphitization mechanisms in the graphite blocks doped by silicon (Si) and titanium (Ti) have been systematically investigated at the atomic scale by high-resolution transmission electron microscopy. Few silicon carbide (SiC) crystallites would be residual and coexisted with titanium carbide (TiC) crystallites with two forms due to the low-energy interface between them, inhibiting the escape of the SiC. Three kinds of residual TiC coexisted with the graphite, which correspond to two distinct catalytic mechanisms. Besides the well-acknowledged dissolution-precipitation mechanism for TiC catalytic graphitization, the TiC formation-decomposition mechanism has been experimentally validated for the first time. Extensive investigations on the interfaces between TiC and graphite crystallites reveal that the orientation of the (111) planes of TiC relative to the interface essentially influence the growth modes and basal plane stacking sequence of graphite, and the related model has been proposed to decode the precipitation mechanism of hexagonal and rhombohedral graphite. (c) 2015 Elsevier Ltd. All rights reserved.
description.department[lin, qingyun ; he, lianlong ; ye, hengqiang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [feng, zhihai ; hu, zijun] aerosp res inst mat & proc technol, natl key lab adv funct composite mat, beijing 100076, peoples r china ; [liu, zhanjun ; guo, quangui] chinese acad sci, inst coal chem, key lab carbon mat, taiyuan 030001, peoples r china
Funding OrganizationNational Program on Key Basic Research Project (973 Program) [2011CB605803, 2011CB605802, 2011CB605604]; National Natural Science Foundation of China [51102070, 50921004]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74647
Collection中国科学院金属研究所
Corresponding Authorllhe@imr.ac.cn
Recommended Citation
GB/T 7714
Lin, QingYun,Feng, Zhihai,Liu, ZhanJun,et al. Atomic scale investigations of catalyst and catalytic graphitization in a silicon and titanium doped graphite[J]. CARBON,2015,88:252-261.
APA Lin, QingYun.,Feng, Zhihai.,Liu, ZhanJun.,Guo, QuanGui.,Hu, ZiJun.,...&llhe@imr.ac.cn.(2015).Atomic scale investigations of catalyst and catalytic graphitization in a silicon and titanium doped graphite.CARBON,88,252-261.
MLA Lin, QingYun,et al."Atomic scale investigations of catalyst and catalytic graphitization in a silicon and titanium doped graphite".CARBON 88(2015):252-261.
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