H ₂ storage using Zr‐CMK ‐3 developed by a new synthesis method

Abstract

One of the biggest problems in using hydrogen as an alternative fuel is that its storage must be safe and portable. This work addresses a new direct synthesis technique used to obtain a novel mesoporous carbon (CMK-3) modified with zirconium oxide. This novel material shows promise for hydrogen adsorption and storage application for energy harvesting. Zirconium oxide (Zr-CMK-3) material is achieved through successful synthesis and characterized by XRD, SEM, Raman, BET, UV-Vis-DRS, XPS and TEM analyses. Zr-CMK-3 significantly improved H 2 storage performance (reaching at 77 K and 10 bar 4.6 wt%) compared to the pristine CMK-3. The novel material is favorable for H 2 uptake by using weak bonding (physisorption). A hydrogen uptake mechanistic approach is proposed and the role of the Zr +4 cation in hydrogen adsorption is discussed.

Influence of the Nitrogen Precursor in the Development of N-Functionalities in a Mesoporous Carbon Material and Its Effect on the Li–S Cells’ Electrochemistry

“…distinct reflection peaks of its amorphous graphitic structure are seen at 2θ = 25° and 45°, corresponding to the (002) and (011) planes respectively (ICSD 98-061-7290), which indicate the presence of the hexagonal ordered structure for CMK-3 carbon materials type [33]. Figure 2D shows the diffraction pattern for elemental sulfur, the observed peaks correspond to the orthorhombic sulfur phase.…”

“…The XRD patterns for the carbon materials before and after sulfur incorporation are presented in Figure 2C,D; elemental sulfur is included as a reference pattern. The XRD patterns for MCE, MCM, and MCH are comparatively displayed in Figure 2C; the two distinct reflection peaks of its amorphous graphitic structure are seen at 2θ = 25 • and 45 • , corresponding to the (002) and (011) planes respectively (ICSD 98-061-7290), which indicate the presence of the hexagonal ordered structure for CMK-3 carbon materials type [33]. Figure 2D shows the diffraction pattern for elemental sulfur, the observed peaks correspond to the orthorhombic sulfur phase.…”