Hydrogen Storage and Nanoparticle Evolution in Benzodithiol‐3‐Thione–Silver Organic–Inorganic Hybrid Material

ABSTRACT [Ag(btt) 2 (NO 3 )] complex was synthesized using 1,2‐benzodithiol‐3‐thione (btt) as a ligand depending on one‐pot synthesis method. FTIR, 1 H‐NMR, elemental analysis, and molar conductivity were used to characterize the silver complex structure. The characterization results prove that btt ligand is attached to the silver center with mono‐dentate behavior through the exocyclic sulfur atom. The silver complex was utilized as a novel precursor for silver nanoparticles using ultrasound method on silver complex powder in 75 mL of deionized water and ultrasonication for 1 h at 90°C using an ultrasonic probe device with a power rating of 150 W. The solution underwent a noticeable color change to blackish‐red. UV–Vis spectrum, XRD pattern, and TEM underscore resulting silver nanoparticles with a diameter range of 47–105 nm, this result from the capping agent effect of btt ligand. The hydrogen storage behavior of [Ag(btt) 2 (NO 3 )] was investigated under different pressures (10–100 bar) at 223 K. The results showed maximum storage of 3.66 wt% at an equilibrium pressure of 88 bar within only 9 s. The kinetic studies were applied on the hydrogen uptake and the results prove that hydrogen storage follows the pseudo‐second‐order kinetic model, as it showed a strong correlation with a value of R 2 = 0.996 and K 2 = 0.117 wt% s −1 .