Mechanochemical synthesis of a TiFe nanocrystalline intermetallic compound and its mechanical alloying with third component

Substitutional effects in TiFe for hydrogen storage: a comprehensive review

“…[111,112] Following the geometric model, it increases the cell parameter of TiFe and decreases the plateau pressures. [113][114][115][116][117] However, a decrease of reversible capacity was observed and related to the enlarged solubility of hydrogen in the solid solution (α phase) at high Zr content. [113] Zr substitution leads to slopping plateaus, no variation in hysteresis and fast kinetics.…”

“…Beside, the addition of free Pd as nano-catalyst nanostructured with TiFe by milling has been reported in many studies to improve air resistance to poisoning and facile activation at room temperature [152][153][154][155][156]. Equally to Ni, the use of Pd Mechanochemical synthesis can introduce Copper (Cu, r Cu = 0.1278 nm) into TiFe, enlarging the cell parameter, thus reducing the first plateau pressure of the binary compound [117]. The combination of Cu substitution for Fe in TiFe and the addition of Fe 2 O 3 has a positive impact on activation process, that is promoted thanks to a more brittle TiFe matrix, an enhanced formation of active surface by cracking, and the lowering of the plateau pressure [127].…”

Hydrogen storage performance of the multi-principal-component CoFeMnTiVZr alloy in electrochemical and gas–solid reactions

“…16 Moreover, it has been reported that at any given temperature, the Cu 0.5 NiAlCoCrFeSi MPC alloy has better resistance to general corrosion in 0.5 M H 2 SO 4 than 304 stainless steel. 15 MPCs and intermetallic compounds (IMC) [51][52][53][54] modied by different alloying elements [55][56][57][58][59] have been investigated as hydrogen-storage alloys in our previous research. In the present work, a combination of structural investigations, volumetric, electrochemical, and calorimetric experimental techniques is employed to study the hydrogen-storage features of the MPC CoFeMnTiVZr alloy obtained by rapid solidication (arcmelting with subsequent melt spinning).…”

Deposition of polymer coating on metallic powder through ball milling: Application to hydrogen storage intermetallics

“…As a result, the first hydrogenation of TiFe requires a complicated activation procedure consisting in a multi-step high-temperature (400-450°C) degassing in vacuum and subsequent exposure to hydrogen at pressures of 3-5 MPa [15][16][17]. In order to eliminate surface contamination of TiFe and to simplify its activation an alloying with various doping components [16][17][18][19][20][21][22][23][24] or surface modification by hydrogen chemisorption catalysts (e.g. palladium [25]) was commonly used.…”