Carbon nanotubes cobalt

Yin H, Zhou Y, Xu J, Ai S, Cui L, Zhu L (2010) Amperometric biosensOT based on tyrosinase immobilized onto multiwalled carbon nanotubes-cobalt phthalocyanine-siUc fibroin film and its application to determine bisphenol A. Anal Chim Acta 659 144—150... 

Mugadza T, Nyokong T (2011) Electrochemical, microscopic and spectroscopic characterization of benzene diamine functionalized single walled carbon nanotube-cobalt (II) tetracarboxy-phthalocyanine conjugates. J Colloid Interf Sci 354 437-447... 

Ozoemena KI, Nkosi D, Pillay J (2008) Influence of solution pH on the electron transport of the self-assembled nanoarrays of single-walled carbon nanotube-cobalt tetra-aminophthalocyanine on gold electrodes electrocatalytic detection of epinephrine. 

Moraes FC, Mascaro LFl, Machado SAS, Brett CMA (2009) Direct electrochemical determination of carbaryl using a multi-walled carbon nanotube/cobalt phthalocyanine modified electrode. Talanta 79 1406-1411... 

Sun X, Li F, Shen G, Huang J, Wang X (2014) Aptasensor based on the synergistic contributions of chitosan-gold nanoparticles, graphene-gold nanoparticles and multi-walled carbon nanotubes-cobalt phthalocyanine nanocomposites ftn kanamycin detection. Analyst... 

Wang GX, Shen XP, Yao J, Wexler D, Ahn JH (2009) Hydrothermal synthesis of carbon nanotube/cobalt oxide core-shell one-dimensional nanocomposite and application as an anode material for lithium-ion batteries. Electrochem Commun 11(3) 546-549. doi 10.1016/j.elecom.2008.12.048... 

Key Words—Carbon, nanotubes, fiber, cobalt, catalysis, fullerenes, TEM. 

Figure 11.8 Formation of ordered nanoparticles of metal from diblock copolymer micelles, (a) Diblock copolymer (b) metal salt partition to centres of the polymer micelles (c) deposition of micelles at a surface (d) micelle removal and reduction of oxide to metal, (e) AFM image of carbon nanotubes and cobalt catalyst nanoparticles after growth (height scale, 5 nm scan size, lxl pm). [Part (e) reproduced from Ref. 47].

Delpeux S., Szostak K., Frackowiak E., Bonnamy S., Beguin F. High yield of pure multiwalled carbon nanotubes from the catalytic decomposition of acetylene on in-situ formed cobalt nanoparticles. J. Nanosc. Nanotech. 2002 2 481-4. 

Bethune, D.S., Kiang, C.H., De Vries, M.S., Gorman, G., Savoy, R. et al. (1993) Cobalt catalysed growth of carbon nanotubes with single-atomic-layer walls. Nature 363, 605-607. 

Guczi, L., Stefler, G., Geszti, O., Koppany, Zs., Molnar, E., Urban, M., and Kiricsi, I. 2006. CO hydrogenation over cobalt and iron catalysts supported over multiwall carbon nanotubes Effect of preparation. Journal of Catalysis 244 24—32. 

Tavasoli, A., Abbaslou, R. M. M., Trepanier, M., and Dalai, A. K. 2008. Fischer-Tropsch synthesis over cobalt catalyst supported on carbon nanotubes in a slurry reactor. Applied Catalysis A General 345 134-42. 

D. S. Bethune, C. H. Kiang, M. S. DeVries, G. Gorman, R. Savoy, J. Vazquez, R. Beyers, Cobalt-catalyzed growth of carbon nanotubes with single-atomic-layer walls, Nature, vol. 363,... 

Liang, Y., et al., Oxygen reduction electrocatalyst based on strongly coupled cobalt oxide nanocrystals and carbon nanotubes. Journal of the American Chemical Society, 2012.134(38) p. 15849-15857. 

Kuan-Xin, H., et ah, Electrodeposition of nickel and cobalt mixed oxide/carbon nanotube thin films and their charge storage properties. Journal of The Electrochemical Society, 2006. 153(8) p. A1568-A1574. 

Wang, M.-S. Bando, Y. Rodriguez-Manzo, J.A. Banhart, F. Golberg, D., Cobalt nanoparticle-assisted engineering of multi-wall carbon nanotubes. ACS Nano 2009,3 2632-2638. 

Recently, the efficacy of LDHs as catalyst precursors for the synthesis of carbon nanotubes via catalytic chemical vapor deposition of acetylene has been reported by Duan et al. [72]. Nanometer-sized cobalt particles were prepared by calcination and subsequent reduction of a single LDH precursor containing cobalt(II) and aluminum ions homogeneously dispersed at the atomic level. Multi-walled carbon nanotubes with uniform diameters were obtained. 

Wei L, Lee CW, Li L et al (2008) Assessment of (n, m) selectively enriched small diameter single-walled carbon nanotubes by density differentiation from cobalt-incorporated MCM-41 for macroelectronics. Chem Mater 20 7417-7424... 

All potentials vs. screen-printed Ag/AgCl pseudo-reference, except values marked with asterisk ( ), which are vs. Ag/3M AgCl double-junction reference electrode, and values marked with dagger CfO, which are vs. saturated calomel. Abbreviations CoPC cobalt phthalocyanine, SPCE screen-printed carbon electrode, GOD glucose oxidase, MWCNT multi-walled carbon nanotubes, NAD nicotinamide adenine dinucleotide, PQQ pyrroloquinoline quinone, FIA flow injection analysis. 

Co-MCM-41 catalyst in H2 at temperatures up to 993 K. It is this intermediate species that preserves the tetrahedral environment in the silica framework and provides the resistance to complete reduction to the metal in the presence of H2. The Co(II) species is resistant to reduction in pure CO the intermediate Co(I) species is more reactive in CO, likely forming cobalt carbonyl-like compounds with high mobility in the MCM-41. These mobile species are the precursors of the metal clusters that grow the carbon nanotubes. Controlling the rates of each step of this two-step reduction process is a key to controlling the sizes of the cobalt metal clusters formed in the cobalt MCM-41 catalysts. 

Figure 5.4 Micrographs of carbon structures generated over large (A) and small (B) cobalt nanoparticles. The large nanoparticles (more than 25 nm in diameter) give rise to the graphite shell over their surface, while the small particles (less than 25 nm in diameter approximately 10 nm in the sample under study) to fine carbon nanotubes with the external diameter equal approximately to the diameter of the Co° particle and wall thickness of approximately 3-5 nm [5].

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