1. INSTM, UdR Alessandria, Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, I-15121Alessandria, Italy
2. Research & Technological Innovation, Centro Ricerche di San Donato Milanese, Eni SpA, Via Felice Maritano 26, 20097San Donato Milanese, Italy
3. Renewables, New Energies and Material Science Research Center, Eni SpA, Via Giacomo Fauser 4, 28100Novara, Italy