Work

Effects of Mo and Ti on monohydride stability and hydrogen storage capacity in BCC Nb–Mo–Ti alloys

Year: 2025

Type: article

Abstract: This study investigates the relationship between the monohydride and reversible hydrogen capacity of Nb–Mo and Nb–Mo–Ti alloys with a body-centered cubic (BCC) structure. Increasing the Mo content in the Nb–Mo alloys increases the plateau pressure and decreases the hydrogen content of monohydrides in the alloys. The increase in plateau pressure prevents sufficient hydrogen absorption over the hydrogen pressure range of the study (up to 9.8 MPa) at 40˚C. The plateau pressure decreased after adding Ti as a third element. Although adding Mo and Ti to Nb scarcely changes the maximum hydrogen capacities, it decreases the hydrogen content and the thermal stability of monohydrides. Accordingly, the reversible hydrogen capacities increase with increasing Mo and Ti contents in Nb–Mo–Ti alloys. At 40 ˚C, the maximum hydrogen capacity and reversible hydrogen capacity are 1.82 H/M and 1.08 H/M, respectively, in the Nb–25Mo–30Ti alloy.

Source: Materials Chemistry and Physics

DOI: 10.1016/j.matchemphys.2025.130829

Authors: Ryo Hirasawa, Siree Burapornpong, Kento Hirata, Atsunori Kamegawa

Institution: Muroran Institute of Technology

Language: English

Topic: Hydrogen Storage and Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,230