Effects of different palladium content loading on the hydrogen storage capacity of double-walled carbon nanotubes

详细信息	查看全文 | 推荐本文 |

• 作者：Huimin Wu^a ; ^{whm267@gmail.com} ; David Wexler^b ; Huakun Liu^b
• 关键词：Double-walled carbon nanotube ; Hydrogen storage ; Spillover ; Adsorption ; Different content
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：April, 2012
• 卷：37
• 期：7
• 页码：5686-5690
• 文件大小：631 K

摘要

The effects of different amounts palladium loading on the hydrogen sorption characteristics of double-walled carbon nanotubes (DWCNTs) have been investigated. The physical properties of the pristine DWCNTs and Pd/DWCNTs were systematically characterized by聽X-ray diffraction, transmission electron microscopy, and Brunauer-Emmett-Teller surface area measurements. Pd nanoparticles were loaded on DWCNT surfaces for the dissociation of H₂ into atomic hydrogen, which spills over to the defect sites on the DWCNTs. When we use different Pd content, the particle size and dispersion will be聽different, which affects the hydrogen storage capacity of the DWCNTs. In this work, the hydrogen storage capacities were measured at ambient temperature and found to be 1.7, 1.85, 3.0, and 2.0聽wt%for pristine DWCNTS, 1.0聽wt%Pd/DWCNTs, 2.0聽wt%Pd/DWCNTs, and 3.0聽wt%Pd/DWCNTs, respectively. We found that the hydrogen storage capacity can be enhanced by loading with Pd nanoparticles and selecting a suitable content. Furthermore, the sorption can be attributed to the chemical reaction between the atomic hydrogen and the dangling bonds of the DWCNTs.