Viscous State Effect on the Activity of Fe Nanocatalysts

Cervantes‐Sodi, Felipe; McNicholas, Thomas P.; Simmons, Jay G.; Liu, Jie; Csänyi, Gábor; Ferrari, Andrea C.; Curtarolo, Stefano

doi:10.1021/nn101883s

Cited by 31 publications

(18 citation statements)

References 56 publications

(139 reference statements)

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“…Many authors reported that the growth rate of nanotubes increases with decreasing the size of catalyst particles. This trend was observed in the synthesis processes using different catalysts: Ni, Co, Fe [181], Co [97], Ni [182–183] and Fe [184–185]. For example, the authors of [183] showed that the growth rate of nanotubes in the CVD synthesis using nickelocene as catalyst precursor and C 2 H 2 as carbon source increased by a factor of 3 while decreasing the size of Ni catalyst particles from 3.1 to 2.2 nm.…”

Section: Reviewmentioning

confidence: 72%

Investigation of growth dynamics of carbon nanotubes

Kharlamova¹

2017

Beilstein J. Nanotechnol.

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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

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Section: Reviewmentioning

confidence: 72%

Investigation of growth dynamics of carbon nanotubes

Kharlamova¹

2017

Beilstein J. Nanotechnol.

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“…Many growth models predict that the nanotube growth rate will either increase [343,344] or decrease [330] with diminishing size of the catalyst particle. For instance, the model proposed by Puretzky et al [330] stipulates that the larger diameter nanotubes should grow faster than the smaller diameter ones due to their higher surface area to circumference ratio.…”

Section: Growth Ratementioning

confidence: 99%

Current understanding of the growth of carbon nanotubes in catalytic chemical vapour deposition

Jourdain

Bichara

2013

Carbon

497

334

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Due to its higher degree of control and its scalability, catalytic chemical vapour deposition is now the prevailing synthesis method of carbon nanotubes. Catalytic chemical vapour deposition implies the catalytic conversion of a gaseous precursor into a solid material at the surface of reactive particles or of a continuous catalyst film acting as a template for the growing material. Significant progress has been made in the field of nanotube synthesis by this method although nanotube samples still generally suffer from a lack of structural control. This illustrates the fact that numerous aspects of the growth mechanism remain ill-understood. The first part of this review is dedicated to a summary of the general background useful for beginners in the field. This background relates to the carbon precursors, the catalyst nanoparticles, their interaction with carbonaceous compounds and their environment. The second part provides an updated review of the influence of the synthesis parameters on the features of nanotube samples: diameters, chirality, metal/semiconductor ratio, length, defect density and catalyst yield. The third part is devoted to important and still open questions, such as the mechanism of nanotube nucleation and the chiral selectivity, and to the hypotheses currently proposed to answer them

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“…2 of Ref. [58]), to study trends of solubility and size-dependent disorder-order transitions and segregation in nanocatalysts [21,[58][59][60] and nanocrystals [61,62].…”

Section: Discussionmentioning

confidence: 99%

Computational Materials Discovery Goes Platinum

Fornari¹

2013

Physics

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We report a comprehensive study of the binary systems of the platinum-group metals with the transition metals, using high-throughput first-principles calculations. These computations predict stability of new compounds in 28 binary systems where no compounds have been reported in the literature experimentally and a few dozen of as-yet unreported compounds in additional systems. Our calculations also identify stable structures at compound compositions that have been previously reported without detailed structural data and indicate that some experimentally reported compounds may actually be unstable at low temperatures. With these results, we construct enhanced structure maps for the binary alloys of platinum-group metals. These maps are much more complete, systematic, and predictive than those based on empirical results alone.

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Viscous State Effect on the Activity of Fe Nanocatalysts

Cited by 31 publications

References 56 publications

Investigation of growth dynamics of carbon nanotubes

Investigation of growth dynamics of carbon nanotubes

Current understanding of the growth of carbon nanotubes in catalytic chemical vapour deposition

Computational Materials Discovery Goes Platinum

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