During the visit, two parts of the study have been conducted; the first is kinetics study of AB2 alloy and the second is the kinetics study on the yttrium hydride as a rare earth material that is mostly studied as hydride materials due to the exceptional properties.
A queasy-isothermal experiment at a different temperature, i.e., 20,40,60, and 80°C, were conducted to study the mechanism of hydrogen desorption and absorption from AB2 alloys. The study of hydrogen absorption and desorption during gas charging and discharging is crucial for further improvement of the alloy for hydrogen storage application.
An example of result hydrogenation is presented in Figure 2 (above), and it can be seen the sample can be fully hydrogenated within 600 Seconds at 40°C. It also can be seen that hydrogenation can be fitted to nucleation and growth models. A result from three different temperatures can be used to obtain the activation energy of hydrogenation as shown in Figure 2 (below). Further study will be done to compare this result with other compositions to obtain the effect of chemical composition.
