Abstract
Hydrogenation of 2-methyl-1,3-butadiene (isoprene) under helium flow in the absence of gaseous hydrogen is used to titrate reactive hydrogen species present in MoS 2 supported on γ-Al 2O 3 previously submitted to a H 2 treatment at various temperatures T R. MoS 2/γ-Al 2O 3 is found to be a hydrogen reservoir and the hydrogen storage depends on the temperature of treatment ( T R) of the solid under H 2, i.e., on the creation of anionic vacancies on the edges of the supported MoS 2 slabs. A similar result has been obtained on a powdered bulk MoS 2, which has been investigated by the same dynamic method, but the amount of titrated reactive hydrogen was much lower. Therefore, in the case of MoS 2/γ-Al 2O 3 the role of the support in the reactive hydrogen storage is illustrated and also explained by the creation of anionic vacancies in the oxide phase.
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