Directions Of Hydrogen Power Development In Tatarstan Republic Antonina Filimonova, Andrey Chichirov, Natalya Chichirova, Artem Filimonov and Alexandr Pechenkin E3S Web Conf., 288 (2021) 01074 Published online: 14 July 2021 DOI: 10.1051/e3sconf/202128801074