Mössbauer spectroscopic study of cobalt hexacyanoferrate nanoparticles: Effect of hydrogenation

This paper reports Mossbauer study of cobalt hexacyanoferrate (CoHCF) before and after hydrogenation. The CoHCF was synthesised by chemical precipitation method. The sample was characterized by using various techniques (XRD, TG, EDX and FTIR). The CoHCF paricles show fcc structure. The hydrogen storage property was measured at different temperature. The COHCF shows maximum 0.93 wt% hydrogen storage capacity at 223K. 57Fe Mossbauer spectroscopic study shows the effect of hydrogenation on the electronic structure in terms of electronic charge distribution and volume expansion. Isomer shift and quadrupole splitting values were found to be increased after hydrogenation.