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

doi:10.1021/acsnano.0c05542

IMR OpenIR

	Precise Identification of the Active Phase of Cobalt Catalyst for Carbon Nanotube Growth by In Situ Transmission Electron Microscopy
	Wang, Yang 1,2; Qiu, Lu 3,4; Zhang, Lili 1; Tang, Dai-Ming 6; Ma, Ruixue 1,2; Wang, Yongzhao 1,2; Zhang, Bingsen 1; Ding, Feng 3; Liu, Chang 1; Cheng, Hui-Ming 1,5
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)
	2020-12-22
发表期刊	ACS NANO
ISSN	1936-0851
卷号	14 期号:12 页码:16823-16831
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.
关键词	carbon nanotube cobalt catalyst active phase growth mechanism environmental TEM
资助者	Ministry of Science and Technology of China ; National Natural Science Foundation of China ; JSPS KAKENHI ; Hundred Talents Program of Chinese Academy of Sciences
DOI	10.1021/acsnano.0c05542
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000603308800046
出版者	AMER CHEMICAL SOC
引用统计	被引频次：52[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/158913
专题	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.Chinese Acad Sci, Inst Met Res IMR, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China USTC, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Ulsan Natl Inst Sci & Technol, Sch Mat Sci & Engn, Ulsan 44919, South Korea 4.Inst Basic Sci, Ctr Multidimens Carbon Mat, Ulsan 44919, South Korea 5.Tsinghua Univ, Shenzhen Geim Graphene Ctr, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Peoples R China 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.