Preparation and properties of hydrogen storage materials of porous carbon composite diatom skeleton

Using a diatom treated with acid as the base skeleton, and introduced furfuryl alcohol into diatom skeleton was in-situ polymerized, followed by carbonizing, alkali activation, and a series novel hydrogen storage materials of porous carbon composite diatom skeleton (A-PCDS) were prepared. The effect of composites prepared with different concentrations of acid treatment diatomaceous earth on the hydrogen storage properties was investigated. The results showed that the use of suitable concentrations of acid treatment was beneficial to the hydrogen storage properties of the final synthesized materials. The 4 M acid-treated final samples showed stronger hydrogen storage performance relative to the 0.5 M acid-treated final samples, and the hydrogen storage capacity was increased from 3.25 wt% (77K, 5 MPa) to 4.21 wt% (77K, 5 MPa). This results will be of great value for the application and development of high-performance and low-cost hydrogen storage materials, which can be prepared in large quantities.