Crystal structure and electrochemical
hydrogenation of HfRe2-xAlx phases
Chem.
Met. Alloys 16 (2021)
64-68
https://doi.org/10.30970/cma14.0428
Crystal structures of
the phases HfRe0.88(1)Al1.12(1) and HfRe0.26(1)Al1.74(1) (from the
solid solutions based on HfRe2 and HfAl2) were determined
from X-ray powder diffraction: structure type MgZn2, Pearson symbol hP12, space group P63/mmc, a = 5.2443(2), c = 8.5281(4) Å and a = 5.2545(3), c = 8.5660(4) Å,
respectively. The ability to electrochemical hydrogenation of samples from the
regions of existence of HfRe2-xAlx solid solutions was
established. It was determined that the largest discharge capacity (68 mA·h/g) is observed in the prototype battery with
an electrode based on the Hf30Re15Al55 alloy.
Projection of the crystal structure of the
phase HfRe0.88Al1.12 and
coordination polyhedra of the atoms.
Keywords
Hafnium / Rhenium / Aluminum
/ X-ray powder diffraction / Solid solution / Crystal structure /
Electrochemical hydrogenation