每周分享

麦克默瑞提克(上海）仪器有限公司

2015/11/26 15:44

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

今天给大家分享的是2015年5月份《Applied Catalysis A: General》上发表的一篇名为：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.

.该文章中材料表征采用的是美国麦克仪器ASAP 2460

详情可参考下面链接：

http://www.sciencedirect.com/science/article/pii/S0926860X15003270

阅读64次

关注

上一篇美国麦克仪器公司参展全国环境催化和环境材料学术会议

下一篇每周分享