| Precise Identification of the Active Phase of Cobalt Catalyst for Carbon Nanotube Growth by In Situ Transmission Electron Microscopy | |
| Wang, Yang1,2; Qiu, Lu3,4; Zhang, Lili1; Tang, Dai-Ming6; Ma, Ruixue1,2; Wang, Yongzhao1,2; Zhang, Bingsen1; Ding, Feng3; Liu, Chang1; Cheng, Hui-Ming1,5 | |
| Corresponding Author | 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 | |
| Source Publication | ACS NANO
 |
| ISSN | 1936-0851 |
| Volume | 14Issue:12Pages:16823-16831 |
| Abstract | 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. |
| Keyword | carbon nanotube cobalt catalyst active phase growth mechanism environmental TEM |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| WOS Subject | Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000603308800046 |
| Publisher | AMER CHEMICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/158913 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, Lili; Tang, Dai-Ming; Ding, Feng; Liu, Chang |
| Affiliation | 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 |
| Recommended Citation 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. |
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