Growing Zigzag (16,0) Carbon Nanotubes with Structure-Defined Catalysts

Yang, Feng; Wang, Xiao; Zhang, Daqi; Qi, Kangcheng; Yang, Juan; Li, Zhiheng; Li, Meihui; Zhao, Xiaozhen; Bai, Xuedong; Li, Yan

doi:10.1021/jacs.5b04403

Cited by 124 publications

(156 citation statements)

References 38 publications

Supporting

Mentioning

146

Contrasting

Order By: Relevance

“…Thus, the use of catalyst promoters likely serves two roles, (1) to replenish the number of metal atoms lost to sublimation, and (2) to reduce the reduction temperature of procatalyst FeMoC into an ''active'' catalyst. Future work will study the catalyst pre-treatment influence on the resulting phase(s) of FeMoC's Fe-Mo catalyst system; akin to the work of Li et al [13][14][15] …”

Section: Discussionmentioning

confidence: 99%

“…Considering the problems in controlling the composition and size of binary metal oxide nanoparticles [12] single molecular precursors would be considered an ideal solution: given the unique composition and hence size of the final nanoparticle. Recently, Li et al used the molecular nanocluster Na 15 [Na 3 ,{Co(H 2 O) 4 (12,6), (14,4), and (16,0) CNTs in efficiencies of 92, 97, and 80% respectively [13][14][15]. They propose the high chiral selectivity arises from two key factors: 1) the excellent matching between the (n,m) nanotube chirality and the Miller (plane) indices of the l-phase W 6 Co 7 alloy, and 2) the stability of the high melting point alloy that maintains its well-defined structure under CVD conditions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Understanding the “Activation” of the Nanocluster [HxPMo12O40⊂H4Mo72Fe30(O2CMe)15O254(H2O)98-y(EtOH)y] for Low Temperature Growth of Carbon Nanotubes

Esquenazi

Barron

2018

J Clust Sci

View full text Add to dashboard Cite

(FeMoC), was the first molecular catalyst precursor (pro-catalyst) that promised controlled growth of carbon nanotubes (CNTs); however, temperatures in excess of * 900°C or the addition of excess iron were required as catalyst promoters for CNT growth. To understand these disappointing results the ''activation'' of FeMoC for CNT growth was studied by systematic investigation of H 2 gas concentration and growth temperature. The pathway for ''activation'' of FeMoC occurs through the sufficient reduction of both metal oxide components in the pro-catalyst. By ensuring pro-catalyst reduction prior to introduction of growth gases, we demonstrate for the first time, growth of CNTs at temperatures as low as 600°C without the use of catalyst promoters using the single molecular precursor, FeMoC. To understand the role of catalyst promoters used in prior work, thermogravimetric analysis experiments were performed. The addition of an iron catalyst promoter is observed to play two key roles in the ''activation'' of FeMoC: (1) to replenish sublimated metal atoms, and (2) to reduce the reduction temperature required for reduction of FeMoC into an ''active'' catalyst. These results caution the conditions employed in many earlier studies for CNT growth, and create new possibilities for molecular pro-catalysts.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Understanding the “Activation” of the Nanocluster [HxPMo12O40⊂H4Mo72Fe30(O2CMe)15O254(H2O)98-y(EtOH)y] for Low Temperature Growth of Carbon Nanotubes

Esquenazi

Barron

2018

J Clust Sci

View full text Add to dashboard Cite

show abstract

“…Since then, chirality selective growth of SWCNTs was succeeded on a number of different catalysts: CoMo [106–108], FeCo [109], FeRu [110], NiFe [111], Co [112–114], FeCu [115], Au [116], CoMn [117], Ni [118], Fe [119–120], CoPt [121], Co x Mg 1−x O [122], CoSO 4 [123], WCo alloy [124–125] and Mo 2 C [126]. SiO 2 or MgO were used as catalyst support.…”

Section: Reviewmentioning

confidence: 99%

“…The authors of [124–125] used WCo alloy particles with specific structure as template to realize the chirality-controlled growth of SWCNTs. In [124], the (12,6) tubes ( d = 1.28 nm) with an abundance higher than 92% were selectively synthesized using ethanol as carbon source.…”

Section: Reviewmentioning

confidence: 99%

Investigation of growth dynamics of carbon nanotubes

Kharlamova¹

2017

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

The synthesis of single-walled carbon nanotubes (SWCNTs) with defined properties is required for both fundamental investigations and practical applications. The revealing and thorough understanding of the growth mechanism of SWCNTs is the key to the synthesis of nanotubes with required properties. This paper reviews the current status of the research on the investigation of growth dynamics of carbon nanotubes. The review starts with the consideration of the peculiarities of the growth mechanism of carbon nanotubes. The physical and chemical states of the catalyst during the nanotube growth are discussed. The chirality selective growth of nanotubes is described. The main part of the review is dedicated to the analysis and systematization of the reported results on the investigation of growth dynamics of nanotubes. The studies on the revealing of the dependence of the growth rate of nanotubes on the synthesis parameters are reviewed. The correlation between the lifetime of catalyst and growth rate of nanotubes is discussed. The reports on the calculation of the activation energy of the nanotube growth are summarized. Finally, the growth properties of inner tubes inside SWCNTs are considered. 826

show abstract

“…[18] By such approaches, either electronic or surface properties of the tubes can be carefully tailored, which is a key point for materials applied in energy storage devices. Due to their unique electronic, mechanical and structural properties, and massive and controlled synthesis at low cost, [19][20][21] CNTs have captured immense attention in recent years for commercial availability. They are extremely promising for applications in massive fields such as electronics, catalysis, sensing, [22] and energy storage in particular.…”

Section: D Carbon Nanotubesmentioning

confidence: 99%

Carbon Nanomaterials in Different Dimensions for Electrochemical Energy Storage

2016

Advanced Energy Materials

Self Cite

252

109

View full text Add to dashboard Cite

In spite of an ongoing advancement, current popular EES systems including Li-ion batteries (LIBs), supercapacitors (SCs), and redox flow cells (RFCs) are limited by severe performance challenges of electrode materials in terms of low energy and power density as well as short durability. To mitigate the issues, carbon nanomaterials could be introduced to these EES systems, taking advantage of their unique geometry, excellent conductivity, large surface area, and intrinsic flexibility. Numerous carbon nanomaterial based EES systems, where carbon nanomaterials are adopted as either conducting additive or active electrode, have been developed and demonstrated appealing energy and power features. With the capability to enhance the structural and electrochemical properties of electrodes, carbon nanomaterials and their derivatives offer a wide range of possibilities to design advanced EES devices that can meet our growing energy and power demands in the future.A number of reviews have been published in the past few years on the application of carbon nanomaterials in EES. [5][6][7][8] However, this area is so active and new works accumulate very quickly. Therefore, it is helpful to update the new designs and outcomes. This progress report will summarize the most exciting recent (from the year 2010 onwards) advances in the application of carbon nanomaterials with different dimensions, i.e., 0D fullerene, 1D CNT, 2D graphene, and 3D assemblies of CNT and graphene, in EES systems, and highlight the new trends in the field. Besides the repetitively reviewed LIBs and SCs, this work will also deal with another important system, the RFC, which has been rejuvenated recently and is becoming increasingly vital for large scale energy storage. The recent EES applications of carbon nanomaterials will be discussed based on their dimensions. Structure and Properties of Various Nanostructured CarbonFullerenes, CNTs, and graphene all present conjugated π electron systems. The unique electronic configuration combined with geometric structure endows them with extraordinary properties, which make them superior to their competitors for specific applications such as EES. 0D FullerenesFullerene normally has a hollow sphere or ellipsoid shape. Specifically, C 60 has a cage-like fused-ring structure (truncated Carbon nanomaterials including fullerenes, carbon nanotubes, graphene, and their assemblies represent a unique type of materials in diverse formats and dimensions. They feature a large surface area, superior conductivity, fast charge transport, and intrinsic stability, which are essentially required for vari ous electrochemical energy storage (EES) systems such as Li-ion batteries, supercapacitors, and redox flow cells. The scaled-up and reliable production and assembly of carbon nanomaterials is a prerequisite for the development of carbon nanomaterial-based EES devices. In this progress report, the preparation of carbon nanostructures and the state-of-the-art applications of carbon nanomaterials with different dimensions in versatile EES...

show abstract

Growing Zigzag (16,0) Carbon Nanotubes with Structure-Defined Catalysts

Cited by 124 publications

References 38 publications

Understanding the “Activation” of the Nanocluster [HxPMo12O40⊂H4Mo72Fe30(O2CMe)15O254(H2O)98-y(EtOH)y] for Low Temperature Growth of Carbon Nanotubes

Understanding the “Activation” of the Nanocluster [HxPMo12O40⊂H4Mo72Fe30(O2CMe)15O254(H2O)98-y(EtOH)y] for Low Temperature Growth of Carbon Nanotubes

Investigation of growth dynamics of carbon nanotubes

Carbon Nanomaterials in Different Dimensions for Electrochemical Energy Storage

Contact Info

Product

Resources

About