The structural and thermal characterization of new Cu-Arginate complex; experimental and simulated hydrogen adsorbstion properties

Abstract

The copper-arginate complex was synthesized and characterized by using FTIR, TG/DTA-DrTG, UV-Vis spectroscopy and elemental analysis methods. In addition, experimental and theoretical hydrogen storage capabilities were investigated. The unit cell of complex structure included that one mole CuII as centered cation and one mole of free NaI cation and one mole of NaSO4- as coordinated to arginine ligand and two moles of arginate ligands and one mole of aqua ligand as coordinated to NaSO4-. The CuII cation had square-pyramidal coordination sphere and the Na1 metal cation had trigonal coordination scheme. The other sodium metal cation (Na2) was implemented in the released position as counter ion of NaSO4-. It was found that the arginine complex, synthesized in this work have 0.533 m2/g BET surface area and 6.92E-3 wt. % hydrogen storage capacity at 77 K and 1 bar while simulated value was 3.27E-3 wt. % for the same conditions.