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Precise Identification of the Active Phase of Cobalt Catalyst for Carbon Nanotube Growth by In Situ Transmission Electron Microscopy

文献类型：期刊论文

作者Wang, Yang2,3; Qiu, Lu4,5; Zhang, Lili2; Tang, Dai-Ming6; Ma, Ruixue2,3; Wang, Yongzhao2,3; Zhang, Bingsen2; Ding, Feng4; Liu, Chang2; Cheng, Hui-Ming1,2
刊名ACS NANO
出版日期2020-12-22
卷号14期号:12页码:16823-16831
ISSN号1936-0851
关键词carbon nanotube cobalt catalyst active phase growth mechanism environmental TEM
DOI10.1021/acsnano.0c05542
通讯作者Zhang, Lili(zhangll@imr.ac.cn) ; Tang, Dai-Ming(tang.daiming@nims.go.jp) ; Ding, Feng(f.ding@unist.ac.kr) ; Liu, Chang(cliu@imr.ac.cn)
英文摘要Revealing the active phase and structure of catalyst nanoparticles (NPs) is crucial for understanding the growth mechanism and realizing the controlled synthesis of carbon nanotubes (CNTs). However, due to the high temperature and complex environment during CNT growth, precise identification of the active catalytic phase remains a great challenge. We investigated the phase evolution of cobalt (Co) catalyst NPs during the incubation, nucleation, and growth stages of CNTs under near-atmospheric pressure using an in situ close-cell environmental transmission electron microscope (ETEM). Strict statistical analysis of the electron diffractograms was performed to accurately identify the phases of the catalyst NPs. It was found that the NPs belong to an orthorhombic Co3C phase that remained unchanged during CNT growth, with errors in lattice spacing <5% and in angle <2 degrees, despite changes in their morphology and orientation. Theoretical calculations further confirm that Co3C is the thermodynamically preferred phase during CNT growth, with the supply of carbon atoms through the surface and NP-CNT interfacial diffusion.
资助项目Ministry of Science and Technology of China[2016YFA0200101] ; National Natural Science Foundation of China[51522210] ; National Natural Science Foundation of China[51972311] ; National Natural Science Foundation of China[51625203] ; JSPS KAKENHI[JP20K05281] ; JSPS KAKENHI[JP25820336] ; Hundred Talents Program of Chinese Academy of Sciences
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science
语种英语
出版者AMER CHEMICAL SOC
WOS记录号WOS:000603308800046
资助机构Ministry of Science and Technology of China ; National Natural Science Foundation of China ; JSPS KAKENHI ; Hundred Talents Program of Chinese Academy of Sciences
源URL[http://ir.imr.ac.cn/handle/321006/158912]  
专题金属研究所_中国科学院金属研究所
通讯作者Zhang, Lili; Tang, Dai-Ming; Ding, Feng; Liu, Chang
作者单位1.Tsinghua Univ, Shenzhen Geim Graphene Ctr, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Peoples R China
2.Chinese Acad Sci, Inst Met Res IMR, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
3.Univ Sci & Technol China USTC, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
4.Ulsan Natl Inst Sci & Technol, Sch Mat Sci & Engn, Ulsan 44919, South Korea
5.Inst Basic Sci, Ctr Multidimens Carbon Mat, Ulsan 44919, South Korea
6.Natl Inst Mat Sci NIMS, Int Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 3050044, Japan
推荐引用方式
GB/T 7714		 Wang, Yang,Qiu, Lu,Zhang, Lili,et al. Precise Identification of the Active Phase of Cobalt Catalyst for Carbon Nanotube Growth by In Situ Transmission Electron Microscopy[J]. ACS NANO,2020,14(12):16823-16831.
APA Wang, Yang.,Qiu, Lu.,Zhang, Lili.,Tang, Dai-Ming.,Ma, Ruixue.,...&Cheng, Hui-Ming.(2020).Precise Identification of the Active Phase of Cobalt Catalyst for Carbon Nanotube Growth by In Situ Transmission Electron Microscopy.ACS NANO,14(12),16823-16831.
MLA Wang, Yang,et al."Precise Identification of the Active Phase of Cobalt Catalyst for Carbon Nanotube Growth by In Situ Transmission Electron Microscopy".ACS NANO 14.12(2020):16823-16831.

入库方式： OAI收割

来源：金属研究所

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