每周分享：Synthesis of three-dimensional macro-porous networks of carbon nanotubes by chemical vapor deposition of methane on Co/Mo/Mg catalyst

今天給大家分享的是2015年5月份《Applied Catalysis A: General》上發(fā)表的一篇名為：Synthesis of three-dimensional macro-porous networks of carbon nanotubes by chemical vapor deposition of methane on Co/Mo/Mg catalyst

文章摘要如下：

Three-dimensional (3D) macro-porous structures composed by carbon nanotubes (CNTs) are synthesized by chemical vapor deposition (CVD) of methane at 1173 K and atmospheric pressure on Co/Mo/Mg catalyst. 3D-structures are due to formation ofinterconnected CNT bundles. Strong metal/support interaction, breaking of the metal particles and large difference between surface- and bulk-diffusion are at base of the “double-base” growth mechanism, proposed to account for their formation. The variation of CH₄ partial pressure (0.32–1.00 atm) reflects on changes in the products’ morphology and carbon yield. These changes result to be determined by the competition between effects (release of H₂ and spreading and diffusion of the carbon atoms over and into the catalyst) promoted by the CH₄ dissociation. At lower CH₄ partial pressure the rate of dissolution of the C atoms is faster than that of the Co/Mo dispersion and bundled CNTs prevailingly form; at higher CH₄ partial pressure the situation inverts and unbundled component of the 3D-structures increases.

.該文章中材料表征采用的是美國麥克儀器ASAP 2460

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