Reconnaissance of the specific surface of vapour grown carbon micro and nanofibres as a main controller of the sorption of hydrogen |
| |
Authors: | A. Madroñ ero,A. Asenjo,M. Jaafar |
| |
Affiliation: | a CENIM (CSIC), Avda Gregorio del Amo 8, 28040 Madrid, Spain b ICMM (CSIC), Cantoblanco, 28049 Madrid, Spain c Department of Inorganic Chemistry, Universidad Nacional de Educación a Distancia, Madrid, Spain d CIEMAT, 04200 Tabernas, Almeria, Spain |
| |
Abstract: | The influence of the hydrogen content in several physical aspects of carbonaceous microfibres obtained from a mixture of hydrogen and hydrocarbon gas is examinated in this study. The hydrogen content is evaluated behalf a measurement of the fibres density. These changes of content depend on the manufacturing process and further treatments of the fibres. The surface energy is established after contact angle evaluation. There is not a clear relation between the surface energy and the porosity, which is a very relevant parameter in order to establish the hydrogen storage capacity of all materials.The fibres have been evaluated using Kelvin probe force microscopy (KPFM), which provides a map of the surface potential. These measurements suggest a relation between the surface potential and the hydrogen adsorbed in the surface of the fibres. |
| |
Keywords: | Atomic force microscopy Interface states Physical adsorption Surface energy Thermal desorption Carbon Hydrogen atom |
本文献已被 ScienceDirect 等数据库收录! |
|