The action of CeO<sub>2</sub> powders in natural rubber was studied. The effects of particle size, content and surface modification of CeO<sub>2</sub> powders o
Mm0.3Ml0.7Ni3.55Co0.75Mn0.4-Al0.3 alloy has high chemical activity and favorable plateaus pressure. Mg2Ni is in favor of high hydrogen storage capacity and low