Fig. 3: Structural characterizations of Ni/Yb2O3.
From: Bixbyite-type Ln2O3 as promoters of metallic Ni for alkaline electrocatalytic hydrogen evolution
a XRD patterns of Ni and Ni/Yb2O3 hybrids with various Ni:Yb molar ratios. b Crystallite sizes derived from XRD patterns with the Debye–Scherrer equation. The error bars show the standard derivation based on triplicate measurements. c Elemental mapping of Ni/Yb2O3 (scale bar: 100 nm). d, e HRTEM images of Ni/Yb2O3 (scale bar: 5 nm for d and 1 nm for e), and line scan of HRETM image. f Fast Fourier transform (FFT) pattern from (e). g Inverse FFT patterns corresponding to the regions of 2 and 3 in (e). h Schematic diagram of the structures corresponding to the regions of 2 and 3 in (e). The blue, magenta, and cyan spheres represent the Ni, O, and Yb atoms, respectively.
