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Preparation of nickel nanoparticles and their catalytic activity in the cracking of methane
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10.1116/1.2885212
/content/avs/journal/jvsta/26/4/10.1116/1.2885212
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/26/4/10.1116/1.2885212
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Figures

Image of FIG. 1.
FIG. 1.

Cracking of methane catalyzed with nickel nanoparticles generated in situ from the thermal decomposition of nickel acetate tetrahydrate investigated by TGA, DTA, and QMS (evolution of hydrogen monitored by ). Methane concentration of 51% in argon, total gas flow of , and heating ramp .

Image of FIG. 2.
FIG. 2.

Metal nickel particles obtained from the thermal decomposition at a heating ramp of of pure up to in a flow of (a) Ar and (b) .

Image of FIG. 3.
FIG. 3.

Cracking of methane catalyzed with nickel nanoparticles generated in situ from the thermal decomposition of nickel acetate tetrahydrate investigated by TGA. Each sample was heated linearly from room temperature to at , varying methane concentration in argon as indicated in corresponding traces. Total gas flow of .

Image of FIG. 4.
FIG. 4.

Relationship between atomic ratio calculated from TGA for the residues collected at and methane concentration. Linear regressions of the curves are indicated in the figure.

Image of FIG. 5.
FIG. 5.

TEM images of carbon nanotubes obtained in the region of the temporary deactivation of the cracking reaction at , varying methane concentrations in argon: (a) 23%, (b) 31%, (c) 51%, and (d) 100%.

Image of FIG. 6.
FIG. 6.

Diameter distribution for carbon nanotubes obtained in the region of temporary deactivation at , varying methane concentrations in argon: (a) , (b) , and (c) .

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/content/avs/journal/jvsta/26/4/10.1116/1.2885212
2008-07-01
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Preparation of nickel nanoparticles and their catalytic activity in the cracking of methane
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/26/4/10.1116/1.2885212
10.1116/1.2885212
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