Amorphization of intermetallic compounds by hydrogen absorption.

Hydrogen storage properties of Ml, _,Ca,Ni, pseudobinary intermetallic compounds

The hydrogen storage properties of the pseudobinary intermetallic compounds Ml, -.Ca,Ni, (where Ml is La-rich mischmetal and x varies from 0 to 0.9) were investigated over the temperature range of 25-80°C It was found in experiment that with increasing x in Ml,_,Ca,Ni, the incubation time for its first hydrogenation shortened, the first hydrogen absorption rate accelerated, the hysteresis lower...

Hydrogen in R2Fe17 intermetallic compounds: Structural, thermodynamic, and magnetic properties

X-ray absorption spectra and electronic structure of Haucke-phase-type intermetallic compounds

— The K X-ray absorption discontinuity of cobalt in the compounds of the RCo5 family (R = rare earth or yttrium) has been measured with a bent crystal spectrograph. It is observed that the main discontinuity shifts to the low energy side, with respect to that in pure cobalt indicating a flow of charge from R to Co. The plot between the observed shifts and the number of covalently bonded electro...

Studies of Modified Hydrogen Storage Intermetallic Compounds Used as Fuel Cell Anodes

The possibility of substituting Pt/C with the hydrogen storage alloy MlNi3.6Co0.85Al0.3Mn0.3 as the anode active material of a proton exchange membrane fuel cell system has been analyzed. The electrochemical properties indicate that a much more electrochemically active anode is obtained by impregnating the active material loaded anode in a Nafion proton conducting polymer. Such performance impr...

Prediction of stable insulating intermetallic compounds

We explore the stability of structure exhibiting hybridization gaps across a broad range of binary and ternary intermetallic compositions by means of band structure and total energy calculations. This search reveals previously unknown metal-based insulators, some with large gaps exceeding 1 eV, such as Al2Fe and Al4IrRe. We confirm large gaps using a hybrid density functional including exact ex...