Rh0.7Ru0.3-MoOx supported on carbon nanotubes boosts hydrogen generation from hydrazine borane at room temperature

Hydrazine borane (HB, N 2 H 4 BH 3 ) is gaining attention as a promising chemical hydrogen storage material due to its impressive hydrogen capacity (15.4 wt%) and stability under normal conditions. However, its dehydrogenation properties have remained unsatisfactory despite numerous efforts. In this study, we have successfully developed rhodium-ruthenium nanoparticles modified with MoO x and supported on carbon nanotubes (Rh 0.7 Ru 0.3 -MoO x /CNTS) using a facile co-reduction method. Surprisingly, the Rh 0.7 Ru 0.3 -MoO x /CNTS catalyst exhibits outstanding performance, surpassing all previously reported activities for HB dehydrogenation. It demonstrates a high turnover frequency (TOF) value of 4412 h −1  at 303 K, 100 % selective conversion of hydrogen, and excellent stability. Through XPS , TEM , BET, and XRD analysis , we have determined that the exceptional performance of Rh 0.7 Ru 0.3 -MoO x /CNTS can be attributed to the synergistic effect of CNTS and MoO x on the catalyst's electronic structure, crystal structure, and particle size. These results provide a solid foundation for the potential application of HB in hydrogen fuel cells.