1. Chemical Process & Energy Resources Institute (CPERI), Centre for Research and Technology Hellas (CERTH), Thessaloniki 57001, Greece
2. School of Science and Technology, International Hellenic University, Thessaloniki 57001, Greece
3. Steeper Energy Canada, Limited, Calgary, Alberta T2L 1Y8, Canada
4. Renewable, New Energies and Material Science Research Center Novara, 28100 Novara, Italy