Characterization of β-Ni(OH)2 by XPS

We report x‐ray photoemission spectra (XPS) of hydrated nickel hydroxide, α‐Ni(OH)2, with composition 3Ni(OH)2 2H2O as determined by thermogravimetry. XPS spectra were measured with the Physical Electronics Model 5400 x‐ray photoelectron spectrometer using unmonochromatized Mg Kα x rays at two pass energy settings corresponding to analyzer energy resolutions of 1.34 and 0.54 eV. We present the survey spectrum (binding energy range of 0–1100 eV) measured at an analyzer energy resolution of 1.34 eV. Multiplexes of the C, O, and Ni photoemission lines, valence band region, as well as the Ni LVV Auger line were measured at an analyzer energy resolution of 0.54 eV. The α‐Ni(OH)2 sample was prepared chemically by reacting Ni(NO3)2 with NaOH.