Partial phase diagrams of the Dy–Pt and Ho–Pt systems and electrocatalytic behaviour of the DyPt and HoPt phases

Electrodeposited Pd-Ni-Mo film as a cathode material for hydrogen evolution reaction

“…The HER at a Pd-Ni electrodeposited alloy electrode has been studied owing to its high HER activity by the combination effect [9] in expectation. Many scientists also made large efforts to search other novel materials for HER catalysis [10][11][12]. On one hand, it was reported that the noble metals are the most active materials for HER catalysis [13,14].…”

Electrocatalytic properties of Fe–R (R=rare earth metal) crystalline alloys as hydrogen electrodes in alkaline water electrolysis

“…These authors have reported that LaNi 5 and other combinations of rare earth metals and Co or Ni, are effective electrocatalysts for the HER. Recently, a beneficial effect of lanthanides on the electrocatalytic properties of nickel and platinum based alloys towards the HER in alkaline solution has been evidenced [13,14].…”

Phase Equilibria in the Fe–Ho–Pt Ternary System at 1173 K

“…[8,9] In the Ho-Pt binary system, the existence of nine intermetallics, namely HoPt 5 (SmPt 5 structure type), HoPt 3 (AuCu 3 structure type), HoPt 2 (Cu 2 Mg structure type), Ho 3 Pt 4 (Pu 3 Pd 4 structure type), HoPt (FeB structure type), Ho 5 Pt 4 (Sm 5 Ge 4 structure type), Ho 5 Pt 3 (Mn 5 Si 3 structure type), Ho 2 Pt (Co 2 Si structure type), and Ho 3 Pt (Fe 3 C structure type), were reported. [10][11][12][13] The Ho-Pt phase diagram was constructed largely based on the presumed similarity to the Er-Pt system. [10] Recently, a partial phase diagram of the Ho-Pt system in the composition range of 0-50 at.% Pt was reported.…”

“…[10] Recently, a partial phase diagram of the Ho-Pt system in the composition range of 0-50 at.% Pt was reported. [11] It showed that the compounds Ho 3 Pt, Ho 2 Pt, Ho 5 Pt 3 , and Ho 5 Pt 4 were formed by peritectic reactions at 1323, 1478, 1628, and 1693 K, respectively, and HoPt melts congruently at 1833 K. The Fe-Ho phase diagram depicts four intermediate phases, namely Fe 17 Ho 2 (Ni 17 Th 2 structure type), Fe 23 Ho 6 (Mn 23 Th 6 structure type), Fe 3 Ho (Be 3 Nb structure type), and Fe 2 Ho (Cu 2 Mg structure type). [14,15] Fe 17 Ho 2 and Fe 23 Ho 6 melted congruently at 1613 and 1605 K, and Fe 3 Ho and Fe 2 Ho were formed via peritectic reactions at 1566 and 1561 K. The crystallographic data on Fe-Pt, Ho-Pt, and Fe-Ho binary compounds are collected in Table 1.…”