Nickel/metal hydride batteries using rare-earth hydrogen storage …
Fine particles of a hydrogen storage alloy (LaNi 3.8 Co 0.5 Mn 0.4 Al 0.3) were microencapsulated with a thin film of nickel of about 0.6 μm thickness.The microencapsulated alloy powders were used as an anode material in a sealed nickel/metal hydride battery.
Study on Hydrogen in Mixed Gas Separated by Rare Earth Hydrogen Storage ...
AB 5-type rare-earth nickel (RE-Ni) based hydrogen storage alloys and AB 3-type La-Mg-Ni based hydrogen storage alloys were prepared by vacuum medium-frequency induction melting in argon atmosphere dustrial offgas was simulated by the mixed gas including H 2, N 2 and CH 4.The purity of hydrogen separated by rare-earth …
A large proportion of the fossil-fuel-derived hydrogen is currently stored in synthetic chemicals such as NH 3, CH 3 OH and cycloalkanes. These economically viable chemicals are excellent...
Insight into anomalous hydrogen adsorption on rare earth metal ...
1 Introduction The study of hydrogen interaction with metal atoms has been the core theme for diverse research disciplines, such as finding new materials for hydrogen storage, 1–3 hydrogen evolution catalysis, 4,5 corrosion control, 6–8 chemical synthesis, 9,10 hydrogen-induced cracking, 11 etc. Hydrogen is a ubiquitous element in the universe and the …
A rare earth hydride supported ruthenium catalyst for the …
Hydrogenation of N-heterocycles is of great significance for their wide range of applications such as building blocks in drug and agrochemical syntheses and liquid organic hydrogen carriers (LOHCs).Pursuing a better hydrogenation performance and stereoselectivity, we successfully developed a rare earth hydride supported ruthenium catalyst Ru/YH 3 for …
Metal Hydrides used for Hydrogen Storage | SpringerLink
This chapter discusses about metal hydride technologies for on-board reversible hydrogen storage applications. The metal hydrides such as intermetallic alloys and solid solutions have interstitial vacancies where atomic hydrogen is absorbed via an exothermic reaction; however, by endothermic path, the metal hydride desorbs the …
Critical materials for the energy transition: Rare earth …
6 | CRITICAL MATERIALS FOR THE ENERGY TRANSITION: RARE EARTH ELEMENTS EXECUTIVE SUMMARY The rare earths are of a group of 17 chemical elements, several of which are critical for the energy transition. Neodymium, praseodymium, dysprosium and terbium are key to the production of the permanent magnets
Several rare-earth metal borohydrides with complex structures covering a wide range of cation ... Q. Liquid organic and inorganic chemical hydrides for high-capacity hydrogen storage. Energy ...
Magnesium-based hydrogen storage compounds: A review
1. Introduction. Future energy requests urgently desire substitutes for the present energy technologies that are relied chiefly on fossil fuels [1].Hydrogen is a promising and broadly expected selection as an alternative energy feedstock [[2], [3], [4]].The primary technical components of the hydrogen energy system cover the …
Development of Ti–V–Cr–Mn–Mo–Ce high-entropy alloys for high …
The V-based body-centered cubic (BCC)-type hydrogen storage alloys have attracted significant attention due to their high theoretical hydrogen storage capacity of 3.80 wt%. However, their practical application faces challenges related to low dehydriding capacity and poor activation performance. To overcome these challenges, a BCC-type …
HYDROGEN ABSORPTION IN RARE EARTH INTERMETALLIC COMPOUNDS
Several years ago rare earth compounds of the hexagonal CaCu 5 type of structure have attracted much attention because of their very favourable hydrogen absorption characteristics. Especially for the compounds LaNi 5 the hydrogen sorption at moderate pressures was found to be large and to proceed at a high rate.[2] Whereas it …
Diversification of interfaces triggered hydrogen storage properties ...
Solid-state hydrogen storage provides a more secure and efficient choice than maintaining hydrogen in liquid-state or high-pressure compressed gas-state since the hydrogen is storaged in a material by physical adsorption or chemical adsorption [1, 2].Metal hydrides exhibit convincing hydrogen storage abilities because of their …
Hydrogen solubility in rare earth based hydrogen storage alloys
The rare earth based AB 5 type alloys have been extensively studied [2], [3], [4].Metal substitution is straightforward to vary the hydrogen storage properties. So far the effect of substitution of A and B-sites by metal elements on the hydrogen storage properties has been experimentally well determined.
Hence, we propose that HEAs can be used as a new class of alloy for hydrogen storage that does not involve any rare-earth metals. Additional Information How to cite this article : Sahlberg, M. et al .
The effect of rare earth (Y, Ce, La, Sc) doping on hydrogen storage properties of Mg 2 Ni (0 1 0) surface are systematically investigated by first principles calculation. The results show that substitutional doping of Ce to Mg atoms significantly reduces the H diffusion barrier by 0.32 eV and the H 2 desorption barrier by 1.0 eV, …
Rare earth-Mg-Ni-based alloys with superlattice structure for ...
The rapid development of Ni-MH batteries urgently needs advanced hydrogen storage alloys as negative electrodes. Rare earth-Mg-Ni-based (R-Mg-Ni-based) hydrogen storage alloys with superlattice structures possess high capacity, good electrochemical properties, moderate hydrogen equilibrium pressure and environment …
Excellent kinetics and effective hydrogen storage capacity at low ...
Furthermore, the gaseous hydrogen storage properties of superlattice rare-earth hydrogen storage alloy working at low temperature were investigated in this work. 2. Experimental2.1. Preparation of the composite. The hydrogen storage alloy La 0.6 Gd 0.15 Mg 0.25 Ni 3.45 was prepared by non-consumable vacuum furnace. Evacuated 3 …
Microstructure and hydrogen storage properties of the Mg
Rare earth elements have excellent catalytic effects on improving hydrogen storage properties of the Mg2Ni-based alloys. This study used a small amount of Y to …
Comprehensive improvement of AB2 hydrogen storage alloy: …
Rare earth substitution enhances the activation, absorption/desorption properties of hydrogen storage alloys, a crucial research area. Despite the extensive variety of A-site elements in multicomponent alloys, there remains a scarcity of reports on how to enhance the hydrogen storage capacity of alloys by substituting different …
Hydrogen storage in a rare-earth perovskite-type oxide La
Recently, rare-earth perovskite-type oxides with the general formula ABO3 (A rare earth element, B transition metal, O oxygen) are regarded as promising materials for Ni/oxide batteries due to their hydrogen storage ability. In the present study, the hydrogen storage properties of the rare-earth perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 …
Vanadium-based alloy for hydrogen storage: a review
The energy crisis and environmental damage aroused from the fast consumption of fossil fuel have emerged as a big concern for modern society [].Hydrogen has been widely considered as a promising energy carrier due to the high energy density (142 MJ·kg −1), high abundance and eco-friendly energy conversion to supply power …
