Novel Clathrate Materials for Hydrogen Storage: H<sub>2</sub> Store in N<sub>2</sub> Hydrate

Abstract

In recent years, solid clathrate gas hydrates are considered to be promising materials for hydrogen storage because they can trap molecular hydrogen within their cages formed by a hydrogen-bond water network. In this paper, we firstly synthesized the nitrogen hydrates, and then used these hydrates for hydrogen storage. The H2 storage potential in these hydrates is investigated by Raman spectrometry technique. The spectral properties show that the multiple H2 occupancies of large cages of N2 hydrates have been realized under mild condition (16 MPa and 255 K) when exposing N2 hydrates in pressurized H2 gas. The results suggest that nitrogen clathrate hydrates are prospective media for H2 storage and may help to design and produce new hydrogen storage materials.