1. Hydrogen storage mission mode MNRE project unit; Hydrogen Energy Centre; Department of Physics; Banaras Hindu University; Varanasi 221005 India
2. CSIR-National Physical Laboratory; New Delhi 110012 India
3. International Association for Hydrogen Energy; 5794 SW 40 Street #303 Miami FL 33155 USA
4. Department of Physics; Central University of Tamil Nadu; Thiruvarur 610005 India