Beiträge zur Kenntnis der Oxydhydrate. XXIV. Das System Nickel(II)oxyd/Wasser

In Situ Laser Raman Spectroscopic Study of Anodic Corrosion Films on Nickel and Cobalt

“…As a further step towards film identification, Raman spectra were taken of standard samples of Ni(OH)2, Ni203, NiO, and NiO2. The first was synthesized following the procedure prescribed by Hfittig and Peter (15), and the product obtained confirmed by x-ray analysis to be Ni(OH)2. The Ni2Os, NiO, and NiO2 were purchased from Alfa-Ventron (Danvers, Massachusetts).…”

XPS study on Mg0.9−xTi0.1PdxNi (x=0.04, 0.06, 0.08, 0.1) hydrogen storage electrode alloys after charge–discharge cycles

“…(1) was also proposed by Liu et al [28] when they investigated the degradation mechanism of La-Mg-Ni-based metal hydride electrode La 0.7 Mg 0.3 Ni 3.4 Mn 0.1 . Hüttig and Peter [29] have actually shown that NiO is practically unconverted to Ni(OH) 2 at ordinary temperatures. Therefore, the hydration of NiO is not a possible way for the formation of Ni(OH) 2 .…”

The Stereochemistry and Valence States of Nickel.

“…The importance of these compounds as depolarizers in the iron-nickel accumulator has led to a considerable amount of work in order to determine their structures and the valence state of the nickel atom. It has been claimed by several workers that these higher oxides are stable only if hydrated and that no anhydrous oxide containing more oxygen than in NiO exists (91,115,189). G. F. Huttig and A. Peter (91) concluded from the similarity of behavior of the hydrated Ni2Os oxide and the compound Co203 • H20, when they are heated, that the nickel was tervalent.…”