Abstract
DURING recent studies of photo-adsorption on high area nickel oxide, decomposition of the oxide was observed at surprisingly low temperatures. Teichner1 first prepared this nickel oxide by decomposing Ni(OH)2 at 200° C for 2 h at a pressure of less than 10−5 mm mercury. It is yellow-green, with a surface area of approximately 100 m2g−1 and has a composition which is almost stoichiometric2. Both composition and area are little changed by further annealing under the same conditions, but on exposing the oxide to higher pressures of oxygen, it blackens instantly.
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References
Teichner, S. J., and Morrison, J. A., Trans. Farad. Soc., 51, 961 (1955).
Cotton, J. D., and Fensham, P. J., Trans. Farad. Soc., 59, 1444 (1963).
Imoto, T., Haramo, Y., and Nichi, Y., J. Chem. Soc. (Japan), 86, 694 (1965).
Fricke, R., Lehrmann, O., and Wolf, W., Z. Physik. Chemie (B), 37, 60 (1937).
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LARKINS, F., FENSHAM, P. Decomposition of Nickel Oxide. Nature 215, 1268–1269 (1967). https://doi.org/10.1038/2151268a0
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DOI: https://doi.org/10.1038/2151268a0
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