Raman Scattering and Infrared Absorption Investigation of Hydrogen Configuration State in Mechanically Milled Graphite under H₂Gas Atmosphere

Abstract

The hydrogen binding state in the mechanically milled graphite has been investigated by Raman scattering and infrared absorption. There is no C–H vibration signal in Raman scattering spectra, while, a C–H vibration signal has been clearly observed by infrared absorption. The dominant hydrogen configuration is C–H 2 and the contribution of C–H 3 slightly increases for a longer milling time. This result indicates the first experimental determination of the hydrogen state in the mechanically milled graphite under hydrogen gas atmosphere.