A layered porous Ni structure contributes to superior low-temperature performance of hydrogen storage alloys

Promoting Catalytic Performance of Metal Hydrides for Reversible Hydrogen Storage in N-ethylcarbazole by Electronic Structure and Hydrogen Chemical Potential Tuning

“…Interestingly, the Al 2p peak at 72.9 eV is absent in all LaNi 5– x Al x samples (Figure S3), which is attributed to leaching of the surface Al in the acid-washing step after molten salt synthesis. Quantitative analysis indicates that the Ni/La ratio obtained from XPS is also higher than the bulk value obtained from ICP-OES, indicating that the postsynthetic acid washing yields a Ni-rich surface, which is in agreement with previous surface modification studies on LaNi 5 -type hydrogen storage alloys. ,, …”

“…Quantitative analysis indicates that the Ni/La ratio obtained from XPS is also higher than the bulk value obtained from ICP-OES, indicating that the postsynthetic acid washing yields a Ni-rich surface, which is in agreement with previous surface modification studies on LaNi 5 -type hydrogen storage alloys. 13,27,28 Using a KCl-LiCl mixture of molten salt is crucial to obtain LaNi 5−x Al x nanoparticles at moderate temperature. When applying the KCl molten salt in LaNi 5 nanoparticles synthesis 13 to prepare LaNi 5−x Al x , AlNi 3 alloy is easily generated (Figure S4a).…”

Kinetics and mechanism effects of 2D carbon supports in hydrogen spillover composites

“…It is known from eqn (1) that under the same discharge current density i d , the kinetic factors such as the particle radius, diffusion coefficient, exchange current density, and electrode polarization overpotential all impact the HRD value. 41,42 Here, to further confirm the effect of different carbon supports on the dynamics of the composites, we performed linear sweep voltammetry, electrochemical impedance spectroscopy (EIS), and potentiostatic step techniques. Fig.…”