Shukla, Vivek Han, Sung Ju Ha, Taejun Padhee, Satya Prakash Suh, Jin-Yoo Cho, Young Whan Lee, Young-Su 2024-09-19T02:00:21Z 2024-09-19T02:00:21Z 2024-09-19 2024-08 0363-907X https://pubs.kist.re.kr/handle/201004/150625 In the present study, we aimed to destabilize the Ti-Al system with nonmetallic oxygen. The synthesis of alpha-(Ti, Al)[O] starting from TiO2, Ti, and Al was carried out through the arc melting method, resulting in three different oxygen content levels, 3.4, 10, and 20 at%. The room temperature activation of alpha-(Ti, Al)[O] was not successful, and the activation was performed at 300 degrees C under 5 MPa H2 pressure. The structural changes after hydrogenation (maximum absorption capacity of 3.74 wt% hydrogen) arose from the transformation of alpha-(Ti, Al)[O] to cubic (Ti, Al)[O]Hx (c-(Ti, Al)[O]Hx); nonetheless, they recovered their original lattice parameters, which are meaningfully larger than those of alpha-Ti, after dehydrogenation. The hydrogen storage capacities for various alpha-(Ti, Al)[O] compositions generally decreased with increasing oxygen (3.4 and 10 at%) and aluminum content in the alloy. In contrast, for the compositions with a higher oxygen content of 20 at%, the hydrogen storage capacity slightly increased as the Al concentration increased: Ti0.790Al0.010O0.200 absorbed 2.91 wt% hydrogen, whereas Ti0.767Al0.033O0.200 absorbed 3.04 wt% hydrogen. The thermogravimetric analysis showed that samples with 20 at% O released hydrogen at lower temperatures even though the major phase after hydrogenation is c-(Ti, Al)[O]Hx regardless of the oxygen content. English John Wiley & Sons Inc. Optimizing Hydrogen Storage Pathways in Ti-Al Alloys through Controlled Oxygen Addition Article 10.1155/2024/2216181 1 International Journal of Energy Research, v.2024 International Journal of Energy Research 2024 Y scie scopus 001307252800002 2-s2.0-85203653008 Energy & Fuels Nuclear Science & Technology Energy & Fuels Nuclear Science & Technology Article TITANIUM ABSORPTION HYDRIDES DESORPTION PROPERTIES LATTICE-CONSTANTS